TY  - JOUR
AU  - Validžić, Ivana Lj.
AU  - Popović, Maja
AU  - Potočnik, Jelena
AU  - Graf, Christina
AU  - Joschko, Maximilian
AU  - Kuznetsova, Yulia A.
AU  - Zatsepin, Dmitry A.
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10750
AB  - Amorphous, non-doped, and copper- and selenium-doped Sb2S3 nanoparticles were synthesized by a hot-injection method. Zinc-doped Sb2S3 nanoparticles were prepared for the first time using the same approach. Electron microscopy revealed that spherical nanoparticles of 1–4 nanometers aggregated into larger spherical clusters. Introducing dopants into the Sb2S3 structure neither influenced the samples’ spherical morphology nor their sizes. The presence of the dopants (Cu, Se, or Zn) was confirmed by energy dispersive X-ray (EDX) and, in the case of Zn, also by inductively coupled plasma-mass spectrometry (ICP-MS). The X-ray powder diffraction (XRPD) patterns of the non-doped and doped samples imply an amorphous structure. Crystalline Zn-doped Sb2S3 revealed defined peaks from only the Sb2S3 phase, indicating successful doping. Diffuse reflectance spectroscopy (DRS) revealed high optical bandgap energies (2.03–2.12 eV) compared to the values (1.6–1.7 eV) for large non-doped and doped particles obtained at 240 °C, which might be attributed to a quantum size effect. X-ray photoelectron spectroscopy (XPS) revealed a phase without any impurities for the undoped and characteristic peaks for copper, selenium, and zinc Auger for the doped samples. XPS valence band confirm for the Zn-doped particles a shift towards lower binding energy compared to the non-doped samples, indicating successful doping. Photoluminescence (PL) measurements show that embedding Zn into the Sb2S3 host lattice suppresses the wide luminescence band related to intrinsic vacancy defects. Narrow peaks at 1.7–2.4 eV were found to be associated with singlet excitons. The energy dependence of the light emission on the synthesized nanoparticles’ size suggests quantum confinement. © 2023, The Author(s), under exclusive licence to Springer Nature B.V.
T2  - Journal of Nanoparticle Research
T1  - Amorphous non-doped and Se-, Cu-, and Zn-doped Sb2S3 nanoparticles prepared by a hot-injection method: bandgap tuning and possible observation of the quantum size effect
VL  - 25
IS  - 3
SP  - 48
DO  - 10.1007/s11051-023-05695-5
ER  - 

@article{
author = "Validžić, Ivana Lj. and Popović, Maja and Potočnik, Jelena and Graf, Christina and Joschko, Maximilian and Kuznetsova, Yulia A. and Zatsepin, Dmitry A.",
year = "2023",
abstract = "Amorphous, non-doped, and copper- and selenium-doped Sb2S3 nanoparticles were synthesized by a hot-injection method. Zinc-doped Sb2S3 nanoparticles were prepared for the first time using the same approach. Electron microscopy revealed that spherical nanoparticles of 1–4 nanometers aggregated into larger spherical clusters. Introducing dopants into the Sb2S3 structure neither influenced the samples’ spherical morphology nor their sizes. The presence of the dopants (Cu, Se, or Zn) was confirmed by energy dispersive X-ray (EDX) and, in the case of Zn, also by inductively coupled plasma-mass spectrometry (ICP-MS). The X-ray powder diffraction (XRPD) patterns of the non-doped and doped samples imply an amorphous structure. Crystalline Zn-doped Sb2S3 revealed defined peaks from only the Sb2S3 phase, indicating successful doping. Diffuse reflectance spectroscopy (DRS) revealed high optical bandgap energies (2.03–2.12 eV) compared to the values (1.6–1.7 eV) for large non-doped and doped particles obtained at 240 °C, which might be attributed to a quantum size effect. X-ray photoelectron spectroscopy (XPS) revealed a phase without any impurities for the undoped and characteristic peaks for copper, selenium, and zinc Auger for the doped samples. XPS valence band confirm for the Zn-doped particles a shift towards lower binding energy compared to the non-doped samples, indicating successful doping. Photoluminescence (PL) measurements show that embedding Zn into the Sb2S3 host lattice suppresses the wide luminescence band related to intrinsic vacancy defects. Narrow peaks at 1.7–2.4 eV were found to be associated with singlet excitons. The energy dependence of the light emission on the synthesized nanoparticles’ size suggests quantum confinement. © 2023, The Author(s), under exclusive licence to Springer Nature B.V.",
journal = "Journal of Nanoparticle Research",
title = "Amorphous non-doped and Se-, Cu-, and Zn-doped Sb2S3 nanoparticles prepared by a hot-injection method: bandgap tuning and possible observation of the quantum size effect",
volume = "25",
number = "3",
pages = "48",
doi = "10.1007/s11051-023-05695-5"
}

Validžić, I. Lj., Popović, M., Potočnik, J., Graf, C., Joschko, M., Kuznetsova, Y. A.,& Zatsepin, D. A.. (2023). Amorphous non-doped and Se-, Cu-, and Zn-doped Sb2S3 nanoparticles prepared by a hot-injection method: bandgap tuning and possible observation of the quantum size effect. in Journal of Nanoparticle Research, 25(3), 48.
https://doi.org/10.1007/s11051-023-05695-5

Validžić IL, Popović M, Potočnik J, Graf C, Joschko M, Kuznetsova YA, Zatsepin DA. Amorphous non-doped and Se-, Cu-, and Zn-doped Sb2S3 nanoparticles prepared by a hot-injection method: bandgap tuning and possible observation of the quantum size effect. in Journal of Nanoparticle Research. 2023;25(3):48.
doi:10.1007/s11051-023-05695-5 .

Validžić, Ivana Lj., Popović, Maja, Potočnik, Jelena, Graf, Christina, Joschko, Maximilian, Kuznetsova, Yulia A., Zatsepin, Dmitry A., "Amorphous non-doped and Se-, Cu-, and Zn-doped Sb2S3 nanoparticles prepared by a hot-injection method: bandgap tuning and possible observation of the quantum size effect" in Journal of Nanoparticle Research, 25, no. 3 (2023):48,
https://doi.org/10.1007/s11051-023-05695-5 . .

TY  - JOUR
AU  - Lupšić, Katarina
AU  - Validžić, Ivana Lj.
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12394
AB  - The basic function of the water flow lens (WFL) system is to cool, decrease, and increase light intensity with inevitable spectral oscillations, but in reality, that manipulation helps to better understand the possible additional optical and light effects and, thus, the nature of light itself, in the hopes of making significant progress toward the use of solar energy. According to the published research on a variety of solar devices, including commercial monocrystalline and amorphous Si-solar cells, differently designed Sb2S3-based solar cells made of synthesized undoped and doped semiconductors, and dye-sensitized solar cells (Dyesol/Greatcell Solar DSL 30 NRD-T) with varying sensitizers and cosensitizers, photovoltaic performance using the WFL system can show significant improvements in all tested conditions. Based on all previous results on different solar devices, many potential explanations for demonstrating common extra-light effects for an increase in the performance of solar cells are experimentally compared and discussed. The theoretical history of the nature of light is reviewed, and our findings are commented on along with new disclosure.
T2  - Energy Technology
T1  - Additional Lighting Effects for Photovoltaic Improvements in the Performance of Solar Cells
DO  - 10.1002/ente.202300721
ER  - 

@article{
author = "Lupšić, Katarina and Validžić, Ivana Lj.",
year = "2023",
abstract = "The basic function of the water flow lens (WFL) system is to cool, decrease, and increase light intensity with inevitable spectral oscillations, but in reality, that manipulation helps to better understand the possible additional optical and light effects and, thus, the nature of light itself, in the hopes of making significant progress toward the use of solar energy. According to the published research on a variety of solar devices, including commercial monocrystalline and amorphous Si-solar cells, differently designed Sb2S3-based solar cells made of synthesized undoped and doped semiconductors, and dye-sensitized solar cells (Dyesol/Greatcell Solar DSL 30 NRD-T) with varying sensitizers and cosensitizers, photovoltaic performance using the WFL system can show significant improvements in all tested conditions. Based on all previous results on different solar devices, many potential explanations for demonstrating common extra-light effects for an increase in the performance of solar cells are experimentally compared and discussed. The theoretical history of the nature of light is reviewed, and our findings are commented on along with new disclosure.",
journal = "Energy Technology",
title = "Additional Lighting Effects for Photovoltaic Improvements in the Performance of Solar Cells",
doi = "10.1002/ente.202300721"
}

Lupšić, K.,& Validžić, I. Lj.. (2023). Additional Lighting Effects for Photovoltaic Improvements in the Performance of Solar Cells. in Energy Technology.
https://doi.org/10.1002/ente.202300721

Lupšić K, Validžić IL. Additional Lighting Effects for Photovoltaic Improvements in the Performance of Solar Cells. in Energy Technology. 2023;.
doi:10.1002/ente.202300721 .

Lupšić, Katarina, Validžić, Ivana Lj., "Additional Lighting Effects for Photovoltaic Improvements in the Performance of Solar Cells" in Energy Technology (2023),
https://doi.org/10.1002/ente.202300721 . .

TY  - JOUR
AU  - Lojpur, Vesna
AU  - Joschko, Maximilian
AU  - Graf, Christina
AU  - Radmilović, Nadežda
AU  - Novaković, Mirjana M.
AU  - Validžić, Ivana Lj.
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9955
AB  - Amorphous non-doped, iodine- and tin-doped Sb2S3 nanoparticles were prepared via the hot-injection method. HRTEM of amorphous undoped and doped samples revealed the formation of spherical nanoparticles of 20–50 nm diameter aggregated into clusters in the size of 100–200 nm. EDX analysis indicated the presence of desired elements in all observed samples. The bandgaps of non-doped and doped samples were determined from the reflectance spectra, and variations of the bandgaps, even small ones, are insufficient indications of doping. These uncertainties are further clarified by investigating crystalline undoped and doped samples in addition to the amorphous ones. XRPD results of the amorphous samples confirmed the amorphous structure, while Le Bail refinements of the crystalline samples show well-defined peaks from only the Sb2S3 phase, indicating a successful doping process. XPS measurements revealed that the phase of the undoped sample is free of impurities and that 3 d peaks of iodine and tin in the doped samples are present. The XPS valence bands shifted towards higher (I) or lower (Sn) binding energies compared to the undoped samples for both amorphous and crystalline samples, which is an additional support that incorporation of dopant ions in the Sb2S3 lattice took place.
T2  - Materials Science in Semiconductor Processing
T1  - Structural, morphological, optical, and electronic properties of amorphous non-doped and I and Sn doped Sb2S3 nanoparticles
VL  - 137
SP  - 106196
DO  - 10.1016/j.mssp.2021.106196
ER  - 

@article{
author = "Lojpur, Vesna and Joschko, Maximilian and Graf, Christina and Radmilović, Nadežda and Novaković, Mirjana M. and Validžić, Ivana Lj.",
year = "2022",
abstract = "Amorphous non-doped, iodine- and tin-doped Sb2S3 nanoparticles were prepared via the hot-injection method. HRTEM of amorphous undoped and doped samples revealed the formation of spherical nanoparticles of 20–50 nm diameter aggregated into clusters in the size of 100–200 nm. EDX analysis indicated the presence of desired elements in all observed samples. The bandgaps of non-doped and doped samples were determined from the reflectance spectra, and variations of the bandgaps, even small ones, are insufficient indications of doping. These uncertainties are further clarified by investigating crystalline undoped and doped samples in addition to the amorphous ones. XRPD results of the amorphous samples confirmed the amorphous structure, while Le Bail refinements of the crystalline samples show well-defined peaks from only the Sb2S3 phase, indicating a successful doping process. XPS measurements revealed that the phase of the undoped sample is free of impurities and that 3 d peaks of iodine and tin in the doped samples are present. The XPS valence bands shifted towards higher (I) or lower (Sn) binding energies compared to the undoped samples for both amorphous and crystalline samples, which is an additional support that incorporation of dopant ions in the Sb2S3 lattice took place.",
journal = "Materials Science in Semiconductor Processing",
title = "Structural, morphological, optical, and electronic properties of amorphous non-doped and I and Sn doped Sb2S3 nanoparticles",
volume = "137",
pages = "106196",
doi = "10.1016/j.mssp.2021.106196"
}

Lojpur, V., Joschko, M., Graf, C., Radmilović, N., Novaković, M. M.,& Validžić, I. Lj.. (2022). Structural, morphological, optical, and electronic properties of amorphous non-doped and I and Sn doped Sb2S3 nanoparticles. in Materials Science in Semiconductor Processing, 137, 106196.
https://doi.org/10.1016/j.mssp.2021.106196

Lojpur V, Joschko M, Graf C, Radmilović N, Novaković MM, Validžić IL. Structural, morphological, optical, and electronic properties of amorphous non-doped and I and Sn doped Sb2S3 nanoparticles. in Materials Science in Semiconductor Processing. 2022;137:106196.
doi:10.1016/j.mssp.2021.106196 .

Lojpur, Vesna, Joschko, Maximilian, Graf, Christina, Radmilović, Nadežda, Novaković, Mirjana M., Validžić, Ivana Lj., "Structural, morphological, optical, and electronic properties of amorphous non-doped and I and Sn doped Sb2S3 nanoparticles" in Materials Science in Semiconductor Processing, 137 (2022):106196,
https://doi.org/10.1016/j.mssp.2021.106196 . .

TY  - JOUR
AU  - Validžić, Ivana Lj.
AU  - Lojpur, Vesna
AU  - Mitrić, Miodrag
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10395
AB  - The operating characteristics of a commercial monocrystalline and amorphous Si-solar cell for outdoor and indoor applications with and without the use of the water flow lens (WFL) system are explored and reported. The cells are tested in indoor conditions with halogen and tungsten lamps, and additionally, in outdoor sun radiation. Changes in the spectra, investigation of the influence of higher and lower lighting, and indirect cooling of the solar cell are possibilities in the application of the used WFL system. After achieving the highest level of development and improvement for the Si-solar cell, as well as approaching theoretical maximum efficiency, it is obvious that efficiency gains can be made by better understanding additional light effects. Measurements made on monocrystalline Si-solar cells revealed that in the “focal point position” where intensity increases (above standard testing conditions [STC]), independently of indoor or outdoor lighting, huge improvements in ISC and VOC were observed. It was found that the ratios of the short-circuit current (ISC) and the input light energy (Pinput) are 5.2 and 24.8 for artificial light and 4.9 and 17.6 for outdoor light, without and with the use of the WFL system, respectively. The same trend after applying the WFL system was observed for the amorphous Si cell, except those oscillations were more pronounced at lower light intensities (far lower than STC), as expected. The ratios of ISC and Pinput are in the range of 5.1–5.3 and 10.5–26.5 without and with the use of the WFL system.
T2  - Environmental Progress and Sustainable Energy
T1  - The influence of the water flow lens system on the operating characteristics of monocrystalline and amorphous Si-solar cells for outdoor and indoor use: The photovoltaic improvement
SP  - e13967
DO  - 10.1002/ep.13967
ER  - 

@article{
author = "Validžić, Ivana Lj. and Lojpur, Vesna and Mitrić, Miodrag",
year = "2022",
abstract = "The operating characteristics of a commercial monocrystalline and amorphous Si-solar cell for outdoor and indoor applications with and without the use of the water flow lens (WFL) system are explored and reported. The cells are tested in indoor conditions with halogen and tungsten lamps, and additionally, in outdoor sun radiation. Changes in the spectra, investigation of the influence of higher and lower lighting, and indirect cooling of the solar cell are possibilities in the application of the used WFL system. After achieving the highest level of development and improvement for the Si-solar cell, as well as approaching theoretical maximum efficiency, it is obvious that efficiency gains can be made by better understanding additional light effects. Measurements made on monocrystalline Si-solar cells revealed that in the “focal point position” where intensity increases (above standard testing conditions [STC]), independently of indoor or outdoor lighting, huge improvements in ISC and VOC were observed. It was found that the ratios of the short-circuit current (ISC) and the input light energy (Pinput) are 5.2 and 24.8 for artificial light and 4.9 and 17.6 for outdoor light, without and with the use of the WFL system, respectively. The same trend after applying the WFL system was observed for the amorphous Si cell, except those oscillations were more pronounced at lower light intensities (far lower than STC), as expected. The ratios of ISC and Pinput are in the range of 5.1–5.3 and 10.5–26.5 without and with the use of the WFL system.",
journal = "Environmental Progress and Sustainable Energy",
title = "The influence of the water flow lens system on the operating characteristics of monocrystalline and amorphous Si-solar cells for outdoor and indoor use: The photovoltaic improvement",
pages = "e13967",
doi = "10.1002/ep.13967"
}

Validžić, I. Lj., Lojpur, V.,& Mitrić, M.. (2022). The influence of the water flow lens system on the operating characteristics of monocrystalline and amorphous Si-solar cells for outdoor and indoor use: The photovoltaic improvement. in Environmental Progress and Sustainable Energy, e13967.
https://doi.org/10.1002/ep.13967

Validžić IL, Lojpur V, Mitrić M. The influence of the water flow lens system on the operating characteristics of monocrystalline and amorphous Si-solar cells for outdoor and indoor use: The photovoltaic improvement. in Environmental Progress and Sustainable Energy. 2022;:e13967.
doi:10.1002/ep.13967 .

Validžić, Ivana Lj., Lojpur, Vesna, Mitrić, Miodrag, "The influence of the water flow lens system on the operating characteristics of monocrystalline and amorphous Si-solar cells for outdoor and indoor use: The photovoltaic improvement" in Environmental Progress and Sustainable Energy (2022):e13967,
https://doi.org/10.1002/ep.13967 . .

TY  - JOUR
AU  - Stamenković, Tijana
AU  - Bundaleski, Nenad
AU  - Barudžija, Tanja
AU  - Validžić, Ivana Lj.
AU  - Lojpur, Vesna
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9894
AB  - X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) measurements are used for investigating incorporation of iodine and tin into the stibnite (Sb2S3) lattice, as well as for determining surface composition and structure, respectively. The XRD analysis revealed the visible presence of a single phase, that of pure orthorhombic Sb2S3 structure. XPS survey spectra confirmed the presence of expected elements (Sb, S, Sn and I) at the surface of corresponding samples. Since the bonding identification was hindered by non-uniform charging of samples during acquiring the photoelectron spectra, a novel approach for the analysis of high resolution spectra was proposed and successfully implemented. XPS results showed that surface composition of the non-doped sample coincides with that of the bulk, while doping strongly affects surface of the samples. Sn-doped sample appears to be prone to surface oxidation. The presence of Sb2S3, Sb2O3, SnS2 and Sn(0) phases at the surface was revealed. Strong segregation of antimony was observed in the I-doped Sb2S3 sample. Iodine is also present at the surface in the form of the SbI3 phase, while the detected sulphur signal most probably corresponds to S atoms from unaltered deeper layers.
T2  - Applied Surface Science
T1  - XPS study of iodine and tin doped Sb2S3 nanostructures affected by non-uniform charging
VL  - 567
SP  - 150822
DO  - 10.1016/j.apsusc.2021.150822
ER  - 

@article{
author = "Stamenković, Tijana and Bundaleski, Nenad and Barudžija, Tanja and Validžić, Ivana Lj. and Lojpur, Vesna",
year = "2021",
abstract = "X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) measurements are used for investigating incorporation of iodine and tin into the stibnite (Sb2S3) lattice, as well as for determining surface composition and structure, respectively. The XRD analysis revealed the visible presence of a single phase, that of pure orthorhombic Sb2S3 structure. XPS survey spectra confirmed the presence of expected elements (Sb, S, Sn and I) at the surface of corresponding samples. Since the bonding identification was hindered by non-uniform charging of samples during acquiring the photoelectron spectra, a novel approach for the analysis of high resolution spectra was proposed and successfully implemented. XPS results showed that surface composition of the non-doped sample coincides with that of the bulk, while doping strongly affects surface of the samples. Sn-doped sample appears to be prone to surface oxidation. The presence of Sb2S3, Sb2O3, SnS2 and Sn(0) phases at the surface was revealed. Strong segregation of antimony was observed in the I-doped Sb2S3 sample. Iodine is also present at the surface in the form of the SbI3 phase, while the detected sulphur signal most probably corresponds to S atoms from unaltered deeper layers.",
journal = "Applied Surface Science",
title = "XPS study of iodine and tin doped Sb2S3 nanostructures affected by non-uniform charging",
volume = "567",
pages = "150822",
doi = "10.1016/j.apsusc.2021.150822"
}

Stamenković, T., Bundaleski, N., Barudžija, T., Validžić, I. Lj.,& Lojpur, V.. (2021). XPS study of iodine and tin doped Sb2S3 nanostructures affected by non-uniform charging. in Applied Surface Science, 567, 150822.
https://doi.org/10.1016/j.apsusc.2021.150822

Stamenković T, Bundaleski N, Barudžija T, Validžić IL, Lojpur V. XPS study of iodine and tin doped Sb2S3 nanostructures affected by non-uniform charging. in Applied Surface Science. 2021;567:150822.
doi:10.1016/j.apsusc.2021.150822 .

Stamenković, Tijana, Bundaleski, Nenad, Barudžija, Tanja, Validžić, Ivana Lj., Lojpur, Vesna, "XPS study of iodine and tin doped Sb2S3 nanostructures affected by non-uniform charging" in Applied Surface Science, 567 (2021):150822,
https://doi.org/10.1016/j.apsusc.2021.150822 . .

TY  - CONF
AU  - Lojpur, Vesna
AU  - Validžić, Ivana Lj.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10780
AB  - Here, the behavior of different types of solar cells at a low light intensity, measured with and without using the water flow lens (WFL) system is investigated. This system enables the cooling of the surface of the solar cell/modules/panels, indirectly cooling the surrounding, and allows investigating of the influence of higher or lower intensities of the light with the inevitable change in the spectrum. All of these effects are very important and can greatly contribute to the better photovoltaic performance of the observed cells. In this study, laboratory-made and commercial solar cells were studied at 5 % sun and (or) 35 % sun using a tungsten and halogen lamp, respectively. Comparing the obtained results performed when the WFL system is used and left out, it was confirmed that the WFL system facilitates obtaining better photovoltaic properties for all investigated solar cells.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : 9th Serbian Ceramic Society Conference : program and the book of abstracts; September 20-21, 2021; Belgrade
T1  - Influence of the water flow lens system on performances of the different laboratory made Sb2S3-based and commercial solar cells
SP  - 37
UR  - https://hdl.handle.net/21.15107/rcub_vinar_10780
ER  - 

@conference{
author = "Lojpur, Vesna and Validžić, Ivana Lj.",
year = "2021",
abstract = "Here, the behavior of different types of solar cells at a low light intensity, measured with and without using the water flow lens (WFL) system is investigated. This system enables the cooling of the surface of the solar cell/modules/panels, indirectly cooling the surrounding, and allows investigating of the influence of higher or lower intensities of the light with the inevitable change in the spectrum. All of these effects are very important and can greatly contribute to the better photovoltaic performance of the observed cells. In this study, laboratory-made and commercial solar cells were studied at 5 % sun and (or) 35 % sun using a tungsten and halogen lamp, respectively. Comparing the obtained results performed when the WFL system is used and left out, it was confirmed that the WFL system facilitates obtaining better photovoltaic properties for all investigated solar cells.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : 9th Serbian Ceramic Society Conference : program and the book of abstracts; September 20-21, 2021; Belgrade",
title = "Influence of the water flow lens system on performances of the different laboratory made Sb2S3-based and commercial solar cells",
pages = "37",
url = "https://hdl.handle.net/21.15107/rcub_vinar_10780"
}

Lojpur, V.,& Validžić, I. Lj.. (2021). Influence of the water flow lens system on performances of the different laboratory made Sb2S3-based and commercial solar cells. in Advanced Ceramics and Application : 9th Serbian Ceramic Society Conference : program and the book of abstracts; September 20-21, 2021; Belgrade
Belgrade : Serbian Ceramic Society., 37.
https://hdl.handle.net/21.15107/rcub_vinar_10780

Lojpur V, Validžić IL. Influence of the water flow lens system on performances of the different laboratory made Sb2S3-based and commercial solar cells. in Advanced Ceramics and Application : 9th Serbian Ceramic Society Conference : program and the book of abstracts; September 20-21, 2021; Belgrade. 2021;:37.
https://hdl.handle.net/21.15107/rcub_vinar_10780 .

Lojpur, Vesna, Validžić, Ivana Lj., "Influence of the water flow lens system on performances of the different laboratory made Sb2S3-based and commercial solar cells" in Advanced Ceramics and Application : 9th Serbian Ceramic Society Conference : program and the book of abstracts; September 20-21, 2021; Belgrade (2021):37,
https://hdl.handle.net/21.15107/rcub_vinar_10780 .

TY  - CONF
AU  - Stamenković, Tijana
AU  - Rakočević, Lazar
AU  - Barudžija, Tanja
AU  - Validžić, Ivana Lj.
AU  - Lojpur, Vesna
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10810
AB  - X-ray photoelectron spectroscopy (XPS) measurements were used for analyzing the incorporation of iodine (I) and tin (Sn) into the stibnite (Sb2 S3 ) lattice obtained via the hot- injection method. The X-ray diffraction (XRD) technique revealed the visible presence of one phase, the pure orthorhombic structure of Sb 2 S3 with the Pnma group. Scanning electron microscopy (SEM) showed long columnar structures with length of few nanometers and diameter of about 150 nm.The incorporation of I and Sn into Sb 2 S3 was verified by comparing the XPS spectra of the non-doped Sb2 S3 and iodine and tin-doped samples, by the distinctive appearance of characteristic 3d peaks of iodine and tin. As well, the relative amounts of I and Sn dopants were determined from the I 3d5/2 and Sn 3d 5/2 , respectively. The obtained, lesser than expected, amount of dopants is likely due to a possible weakening of I and Sn signals. Shifting of the valence band towards higher (I-doped Sb2S3 ) or lower (Sn-doped Sb2 S3 ) energies, related to the non-doped sample, also confirmed the successful incorporation of dopant atoms in the Sb2 S3 lattice.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : 9th Serbian Ceramic Society Conference : program and the book of abstracts; September 20-21, 2021; Belgrade
T1  - Study of iodine (n) and tin (p) doped Sb2S3 nanoparticles by detail X-ray photoelectron spectroscopy
SP  - 68
UR  - https://hdl.handle.net/21.15107/rcub_vinar_10810
ER  - 

@conference{
author = "Stamenković, Tijana and Rakočević, Lazar and Barudžija, Tanja and Validžić, Ivana Lj. and Lojpur, Vesna",
year = "2021",
abstract = "X-ray photoelectron spectroscopy (XPS) measurements were used for analyzing the incorporation of iodine (I) and tin (Sn) into the stibnite (Sb2 S3 ) lattice obtained via the hot- injection method. The X-ray diffraction (XRD) technique revealed the visible presence of one phase, the pure orthorhombic structure of Sb 2 S3 with the Pnma group. Scanning electron microscopy (SEM) showed long columnar structures with length of few nanometers and diameter of about 150 nm.The incorporation of I and Sn into Sb 2 S3 was verified by comparing the XPS spectra of the non-doped Sb2 S3 and iodine and tin-doped samples, by the distinctive appearance of characteristic 3d peaks of iodine and tin. As well, the relative amounts of I and Sn dopants were determined from the I 3d5/2 and Sn 3d 5/2 , respectively. The obtained, lesser than expected, amount of dopants is likely due to a possible weakening of I and Sn signals. Shifting of the valence band towards higher (I-doped Sb2S3 ) or lower (Sn-doped Sb2 S3 ) energies, related to the non-doped sample, also confirmed the successful incorporation of dopant atoms in the Sb2 S3 lattice.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : 9th Serbian Ceramic Society Conference : program and the book of abstracts; September 20-21, 2021; Belgrade",
title = "Study of iodine (n) and tin (p) doped Sb2S3 nanoparticles by detail X-ray photoelectron spectroscopy",
pages = "68",
url = "https://hdl.handle.net/21.15107/rcub_vinar_10810"
}

Stamenković, T., Rakočević, L., Barudžija, T., Validžić, I. Lj.,& Lojpur, V.. (2021). Study of iodine (n) and tin (p) doped Sb2S3 nanoparticles by detail X-ray photoelectron spectroscopy. in Advanced Ceramics and Application : 9th Serbian Ceramic Society Conference : program and the book of abstracts; September 20-21, 2021; Belgrade
Belgrade : Serbian Ceramic Society., 68.
https://hdl.handle.net/21.15107/rcub_vinar_10810

Stamenković T, Rakočević L, Barudžija T, Validžić IL, Lojpur V. Study of iodine (n) and tin (p) doped Sb2S3 nanoparticles by detail X-ray photoelectron spectroscopy. in Advanced Ceramics and Application : 9th Serbian Ceramic Society Conference : program and the book of abstracts; September 20-21, 2021; Belgrade. 2021;:68.
https://hdl.handle.net/21.15107/rcub_vinar_10810 .

Stamenković, Tijana, Rakočević, Lazar, Barudžija, Tanja, Validžić, Ivana Lj., Lojpur, Vesna, "Study of iodine (n) and tin (p) doped Sb2S3 nanoparticles by detail X-ray photoelectron spectroscopy" in Advanced Ceramics and Application : 9th Serbian Ceramic Society Conference : program and the book of abstracts; September 20-21, 2021; Belgrade (2021):68,
https://hdl.handle.net/21.15107/rcub_vinar_10810 .

TY  - JOUR
AU  - Lojpur, Vesna
AU  - Validžić, Ivana Lj.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8467
AB  - Recently, dye-sensitized solar cells demonstrated a superior performance under ambient light conditions. In this study, the influence on dye-sensitized solar cell performances was investigated under different light sources, light intensity, spectra, and water flow lens (WFL) system. Three types of light sources (xenon, halogen, and tungsten) with various spectral distributions (spectra) were used. Dyes-sensitized solar cells with varied sensitizers and co-sensitizers were tested depending on the light sources. Higher efficiency was obtained under irradiance of tungsten and halogen lamp in comparison to the xenon lamp, specifically at lower light intensities. Additionally, a new way of spectral adjustment was demonstrated. The use of a WFL system changes the distribution of spectra and remarkably influence for better performances of solar cells and efficiency values up to 30%. The results revealed that at lower light intensity, the influence of spectra was dominant and by changing spectral distribution various values of efficiency can be obtained. Also, a great influence on solar cells characteristics had a light source used for measurements. IEEE
T2  - IEEE Journal of Photovoltaics
T1  - Influence of Different Light Sources, Light Intensities, and Water Flow Lens (WFL) System on Dye-Sensitized Solar Cell Performances
VL  - 9
IS  - 2
SP  - 492
EP  - 498
DO  - 10.1109/JPHOTOV.2018.2887040
ER  - 

@article{
author = "Lojpur, Vesna and Validžić, Ivana Lj.",
year = "2019",
abstract = "Recently, dye-sensitized solar cells demonstrated a superior performance under ambient light conditions. In this study, the influence on dye-sensitized solar cell performances was investigated under different light sources, light intensity, spectra, and water flow lens (WFL) system. Three types of light sources (xenon, halogen, and tungsten) with various spectral distributions (spectra) were used. Dyes-sensitized solar cells with varied sensitizers and co-sensitizers were tested depending on the light sources. Higher efficiency was obtained under irradiance of tungsten and halogen lamp in comparison to the xenon lamp, specifically at lower light intensities. Additionally, a new way of spectral adjustment was demonstrated. The use of a WFL system changes the distribution of spectra and remarkably influence for better performances of solar cells and efficiency values up to 30%. The results revealed that at lower light intensity, the influence of spectra was dominant and by changing spectral distribution various values of efficiency can be obtained. Also, a great influence on solar cells characteristics had a light source used for measurements. IEEE",
journal = "IEEE Journal of Photovoltaics",
title = "Influence of Different Light Sources, Light Intensities, and Water Flow Lens (WFL) System on Dye-Sensitized Solar Cell Performances",
volume = "9",
number = "2",
pages = "492-498",
doi = "10.1109/JPHOTOV.2018.2887040"
}

Lojpur, V.,& Validžić, I. Lj.. (2019). Influence of Different Light Sources, Light Intensities, and Water Flow Lens (WFL) System on Dye-Sensitized Solar Cell Performances. in IEEE Journal of Photovoltaics, 9(2), 492-498.
https://doi.org/10.1109/JPHOTOV.2018.2887040

Lojpur V, Validžić IL. Influence of Different Light Sources, Light Intensities, and Water Flow Lens (WFL) System on Dye-Sensitized Solar Cell Performances. in IEEE Journal of Photovoltaics. 2019;9(2):492-498.
doi:10.1109/JPHOTOV.2018.2887040 .

Lojpur, Vesna, Validžić, Ivana Lj., "Influence of Different Light Sources, Light Intensities, and Water Flow Lens (WFL) System on Dye-Sensitized Solar Cell Performances" in IEEE Journal of Photovoltaics, 9, no. 2 (2019):492-498,
https://doi.org/10.1109/JPHOTOV.2018.2887040 . .

TY  - JOUR
AU  - Lojpur, Vesna
AU  - Mitrić, Miodrag
AU  - Validžić, Ivana Lj.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8556
AB  - The performances of a photovoltaic system based on high-efficiency commercial monocrystalline Si solar cell associated with the water flow lens (WFL) system are investigated. This system enables the cooling of the surface of the cell, indirectly cooling the surrounding, and, on the other hand, it allows us to investigate, depending on the position of the cell and the WFL system, the influence of larger and smaller intensities of the light with the inevitable change in the spectrum. All of these effects are very important and can greatly contribute to the better photovoltaic performance of the used cells. Indoor characterization at higher and lower light intensities is performed using both different spectra and intensity of the light. The obtained results show that at low/lower light intensity, spectra are more dominant than the intensity of light itself and that the used WFL system always improves the photovoltaic response leading to a higher efficiency of the tested solar cell. It was found that the ratios of the short circuit current (I sc ) and the input light energy (P input ) are 4.42 and 8.96 without and with the use of the WFL system in the measurements, respectively. The same Si solar cell is also tested in outdoor condition, but this time using the WFL system to concentrate sunlight to produce a larger amount of power and water flow for cooling the surface of the solar cell. Again, a higher efficiency (an increase from 25.7% to 33.5%) by using the WFL system was obtained. © 2019 John Wiley & Sons, Ltd.
T2  - International Journal of Energy Research
T1  - The improved photovoltaic response of commercial monocrystalline Si solar cell under natural and artificial light by using water flow lens (WFL) system
VL  - 43
IS  - 8
SP  - 3507
EP  - 3515
DO  - 10.1002/er.4491
ER  - 

@article{
author = "Lojpur, Vesna and Mitrić, Miodrag and Validžić, Ivana Lj.",
year = "2019",
abstract = "The performances of a photovoltaic system based on high-efficiency commercial monocrystalline Si solar cell associated with the water flow lens (WFL) system are investigated. This system enables the cooling of the surface of the cell, indirectly cooling the surrounding, and, on the other hand, it allows us to investigate, depending on the position of the cell and the WFL system, the influence of larger and smaller intensities of the light with the inevitable change in the spectrum. All of these effects are very important and can greatly contribute to the better photovoltaic performance of the used cells. Indoor characterization at higher and lower light intensities is performed using both different spectra and intensity of the light. The obtained results show that at low/lower light intensity, spectra are more dominant than the intensity of light itself and that the used WFL system always improves the photovoltaic response leading to a higher efficiency of the tested solar cell. It was found that the ratios of the short circuit current (I sc ) and the input light energy (P input ) are 4.42 and 8.96 without and with the use of the WFL system in the measurements, respectively. The same Si solar cell is also tested in outdoor condition, but this time using the WFL system to concentrate sunlight to produce a larger amount of power and water flow for cooling the surface of the solar cell. Again, a higher efficiency (an increase from 25.7% to 33.5%) by using the WFL system was obtained. © 2019 John Wiley & Sons, Ltd.",
journal = "International Journal of Energy Research",
title = "The improved photovoltaic response of commercial monocrystalline Si solar cell under natural and artificial light by using water flow lens (WFL) system",
volume = "43",
number = "8",
pages = "3507-3515",
doi = "10.1002/er.4491"
}

Lojpur, V., Mitrić, M.,& Validžić, I. Lj.. (2019). The improved photovoltaic response of commercial monocrystalline Si solar cell under natural and artificial light by using water flow lens (WFL) system. in International Journal of Energy Research, 43(8), 3507-3515.
https://doi.org/10.1002/er.4491

Lojpur V, Mitrić M, Validžić IL. The improved photovoltaic response of commercial monocrystalline Si solar cell under natural and artificial light by using water flow lens (WFL) system. in International Journal of Energy Research. 2019;43(8):3507-3515.
doi:10.1002/er.4491 .

Lojpur, Vesna, Mitrić, Miodrag, Validžić, Ivana Lj., "The improved photovoltaic response of commercial monocrystalline Si solar cell under natural and artificial light by using water flow lens (WFL) system" in International Journal of Energy Research, 43, no. 8 (2019):3507-3515,
https://doi.org/10.1002/er.4491 . .

TY  - JOUR
AU  - Lojpur, Vesna
AU  - Krstić, Jelena
AU  - Kačarević-Popović, Zorica M.
AU  - Mitrić, Miodrag
AU  - Rakočević, Zlatko Lj.
AU  - Validžić, Ivana Lj.
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1915
AB  - We present here a novel solar cell made of ITO/composite p-doped Sb2S3 + P3HT + PANI + TiO2/amorphous Sb2S3+P3HT+PANI+TiO2/n-doped Sb2S3 + P3HT + PANI + TiO2/solid carrier/aluminum as counter electrode. With spraying technique, the layers were deposited and the thickness of films was 1m. A new solid carrier of electrolyte was a blend consisted of chitosan (low MW), polyethylene glycol and electrolyte. X-ray diffraction was recorded to confirm the amorphous nature of the blend. Information about the surface appearance and roughness of a solid carrier dry and soaked in the electrolyte was given by atomic force microscopy. The solar cell was examined at very low and low light intensity (5% and 35% of sun, respectively), and at standard test conditions (100% of sun) using different light sources. The whole cell surface was 7.5cm(2) while the illuminated part was 3cm(2). Obtained results expressed for the illuminated surface showed the highest efficiency of 23.1% at 5% of sun while the efficiency of the cell was 2.9% at 35% of sun and only 0.75% at intensity of 100% of sun.
T2  - International Journal of Energy Research
T1  - Efficient and novel Sb2S3 based solar cells with chitosan/poly(ethylene glycol)/electrolyte blend
VL  - 42
IS  - 2
SP  - 843
EP  - 852
DO  - 10.1002/er.3899
ER  - 

@article{
author = "Lojpur, Vesna and Krstić, Jelena and Kačarević-Popović, Zorica M. and Mitrić, Miodrag and Rakočević, Zlatko Lj. and Validžić, Ivana Lj.",
year = "2018",
abstract = "We present here a novel solar cell made of ITO/composite p-doped Sb2S3 + P3HT + PANI + TiO2/amorphous Sb2S3+P3HT+PANI+TiO2/n-doped Sb2S3 + P3HT + PANI + TiO2/solid carrier/aluminum as counter electrode. With spraying technique, the layers were deposited and the thickness of films was 1m. A new solid carrier of electrolyte was a blend consisted of chitosan (low MW), polyethylene glycol and electrolyte. X-ray diffraction was recorded to confirm the amorphous nature of the blend. Information about the surface appearance and roughness of a solid carrier dry and soaked in the electrolyte was given by atomic force microscopy. The solar cell was examined at very low and low light intensity (5% and 35% of sun, respectively), and at standard test conditions (100% of sun) using different light sources. The whole cell surface was 7.5cm(2) while the illuminated part was 3cm(2). Obtained results expressed for the illuminated surface showed the highest efficiency of 23.1% at 5% of sun while the efficiency of the cell was 2.9% at 35% of sun and only 0.75% at intensity of 100% of sun.",
journal = "International Journal of Energy Research",
title = "Efficient and novel Sb2S3 based solar cells with chitosan/poly(ethylene glycol)/electrolyte blend",
volume = "42",
number = "2",
pages = "843-852",
doi = "10.1002/er.3899"
}

Lojpur, V., Krstić, J., Kačarević-Popović, Z. M., Mitrić, M., Rakočević, Z. Lj.,& Validžić, I. Lj.. (2018). Efficient and novel Sb2S3 based solar cells with chitosan/poly(ethylene glycol)/electrolyte blend. in International Journal of Energy Research, 42(2), 843-852.
https://doi.org/10.1002/er.3899

Lojpur V, Krstić J, Kačarević-Popović ZM, Mitrić M, Rakočević ZL, Validžić IL. Efficient and novel Sb2S3 based solar cells with chitosan/poly(ethylene glycol)/electrolyte blend. in International Journal of Energy Research. 2018;42(2):843-852.
doi:10.1002/er.3899 .

Lojpur, Vesna, Krstić, Jelena, Kačarević-Popović, Zorica M., Mitrić, Miodrag, Rakočević, Zlatko Lj., Validžić, Ivana Lj., "Efficient and novel Sb2S3 based solar cells with chitosan/poly(ethylene glycol)/electrolyte blend" in International Journal of Energy Research, 42, no. 2 (2018):843-852,
https://doi.org/10.1002/er.3899 . .

TY  - JOUR
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7577
AB  - We report here an optic/lens system that we used so far, for cooling the surface of solar cells, the reduction of light intensity and the change of light distribution that reaches the surface of the solar cell. The objective was to improve photovoltaic characteristics under very low light illumination, as well as to understand the connection between light, optic/lens and photovoltaic behavior for Sb2S3 thin-film solar cells. Et was found that for all so far designed thin-film solar cells made and based on the synthesized Sb2S3, optics/lens system causes an Increase in open circuit voltage (V-oc) and short circuit current (I-sc) and thus the efficiencies of made solar devices. Values of energy gaps for the thin-films made devices were in the range from 1.4 to 2 eV. Improvements of the photovoltaic response of the designed devices are found to be better at the lower light intensity (S% sun), than at higher intensities of light. For the same intensity of light used optic/lens improves the efficiency of the devices, by changing the light distribution. Other processes that are related to the optics/lens system, leading to an increase in I-sc and V-oc and consequently to an increase in efficiencies of the designed devices, are investigated. (C) 2017 Elsevier Ltd. All rights reserved.
T2  - Optics and Laser Technology
T1  - The role of low light intensity: A step towards understanding the connection between light, optic/lens and photovoltaic behavior for Sb2S3 thin-film solar cells
VL  - 101
SP  - 425
EP  - 432
DO  - 10.1016/j.optlastec.2017.11.045
ER  - 

@article{
year = "2018",
abstract = "We report here an optic/lens system that we used so far, for cooling the surface of solar cells, the reduction of light intensity and the change of light distribution that reaches the surface of the solar cell. The objective was to improve photovoltaic characteristics under very low light illumination, as well as to understand the connection between light, optic/lens and photovoltaic behavior for Sb2S3 thin-film solar cells. Et was found that for all so far designed thin-film solar cells made and based on the synthesized Sb2S3, optics/lens system causes an Increase in open circuit voltage (V-oc) and short circuit current (I-sc) and thus the efficiencies of made solar devices. Values of energy gaps for the thin-films made devices were in the range from 1.4 to 2 eV. Improvements of the photovoltaic response of the designed devices are found to be better at the lower light intensity (S% sun), than at higher intensities of light. For the same intensity of light used optic/lens improves the efficiency of the devices, by changing the light distribution. Other processes that are related to the optics/lens system, leading to an increase in I-sc and V-oc and consequently to an increase in efficiencies of the designed devices, are investigated. (C) 2017 Elsevier Ltd. All rights reserved.",
journal = "Optics and Laser Technology",
title = "The role of low light intensity: A step towards understanding the connection between light, optic/lens and photovoltaic behavior for Sb2S3 thin-film solar cells",
volume = "101",
pages = "425-432",
doi = "10.1016/j.optlastec.2017.11.045"
}

(2018). The role of low light intensity: A step towards understanding the connection between light, optic/lens and photovoltaic behavior for Sb2S3 thin-film solar cells. in Optics and Laser Technology, 101, 425-432.
https://doi.org/10.1016/j.optlastec.2017.11.045

The role of low light intensity: A step towards understanding the connection between light, optic/lens and photovoltaic behavior for Sb2S3 thin-film solar cells. in Optics and Laser Technology. 2018;101:425-432.
doi:10.1016/j.optlastec.2017.11.045 .

"The role of low light intensity: A step towards understanding the connection between light, optic/lens and photovoltaic behavior for Sb2S3 thin-film solar cells" in Optics and Laser Technology, 101 (2018):425-432,
https://doi.org/10.1016/j.optlastec.2017.11.045 . .

TY  - JOUR
AU  - Validžić, Ivana Lj.
AU  - Popović, Maja
AU  - Lojpur, Vesna
AU  - Bundaleski, Nenad
AU  - Rakočević, Zlatko Lj.
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7646
AB  - The effect of incorporating copper (Cu) and selenium (Se) ions into stibnite (Sb2S3) lattice was investigated using x-ray photoelectron spectroscopy (XPS). The incorporation of Cu and Se ions was verified by comparing the XPS spectra of the undoped (amorphous Sb2S3), doped (p and n-doped) and pure Se and Cu-acetate powders. The main photoelectron Cu 2p(1/2) (951.8 eV) and Cu 2p(3/2) (932.1 eV) lines derived from the Cu-doped and Cu-acetate powder samples were clearly observed, whereas in the undoped sample, none of the characteristic lines of Cu were detected. The Se Auger line (138.6 eV), the only line of Se which does not coincide with the lines of Sb and S, was successfully detected in an Se-doped XPS sample and the spectrum of pure Se, while Se in the undoped sample was not found. Further, the XPS measurements revealed the relative amounts of Cu and Se in antimony sulfide, as well as the oxidation state of copper incorporated into the matrix.
T2  - Journal of Electronic Materials
T1  - Confirmation of Incorporation of Cu and Se Ions in Applied p- and n-Type-Doped Sb2S3 by Photoemission Spectroscopy
VL  - 47
IS  - 4
SP  - 2402
EP  - 2410
DO  - 10.1007/s11664-018-6072-5
ER  - 

@article{
author = "Validžić, Ivana Lj. and Popović, Maja and Lojpur, Vesna and Bundaleski, Nenad and Rakočević, Zlatko Lj.",
year = "2018",
abstract = "The effect of incorporating copper (Cu) and selenium (Se) ions into stibnite (Sb2S3) lattice was investigated using x-ray photoelectron spectroscopy (XPS). The incorporation of Cu and Se ions was verified by comparing the XPS spectra of the undoped (amorphous Sb2S3), doped (p and n-doped) and pure Se and Cu-acetate powders. The main photoelectron Cu 2p(1/2) (951.8 eV) and Cu 2p(3/2) (932.1 eV) lines derived from the Cu-doped and Cu-acetate powder samples were clearly observed, whereas in the undoped sample, none of the characteristic lines of Cu were detected. The Se Auger line (138.6 eV), the only line of Se which does not coincide with the lines of Sb and S, was successfully detected in an Se-doped XPS sample and the spectrum of pure Se, while Se in the undoped sample was not found. Further, the XPS measurements revealed the relative amounts of Cu and Se in antimony sulfide, as well as the oxidation state of copper incorporated into the matrix.",
journal = "Journal of Electronic Materials",
title = "Confirmation of Incorporation of Cu and Se Ions in Applied p- and n-Type-Doped Sb2S3 by Photoemission Spectroscopy",
volume = "47",
number = "4",
pages = "2402-2410",
doi = "10.1007/s11664-018-6072-5"
}

Validžić, I. Lj., Popović, M., Lojpur, V., Bundaleski, N.,& Rakočević, Z. Lj.. (2018). Confirmation of Incorporation of Cu and Se Ions in Applied p- and n-Type-Doped Sb2S3 by Photoemission Spectroscopy. in Journal of Electronic Materials, 47(4), 2402-2410.
https://doi.org/10.1007/s11664-018-6072-5

Validžić IL, Popović M, Lojpur V, Bundaleski N, Rakočević ZL. Confirmation of Incorporation of Cu and Se Ions in Applied p- and n-Type-Doped Sb2S3 by Photoemission Spectroscopy. in Journal of Electronic Materials. 2018;47(4):2402-2410.
doi:10.1007/s11664-018-6072-5 .

Validžić, Ivana Lj., Popović, Maja, Lojpur, Vesna, Bundaleski, Nenad, Rakočević, Zlatko Lj., "Confirmation of Incorporation of Cu and Se Ions in Applied p- and n-Type-Doped Sb2S3 by Photoemission Spectroscopy" in Journal of Electronic Materials, 47, no. 4 (2018):2402-2410,
https://doi.org/10.1007/s11664-018-6072-5 . .

TY  - JOUR
AU  - Lojpur, Vesna
AU  - Krstić, Jelena
AU  - Kačarević-Popović, Zorica M.
AU  - Filipović, Nenad
AU  - Validžić, Ivana Lj.
PY  - 2018
UR  - http://link.springer.com/10.1007/s10311-017-0702-7
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7737
AB  - Producing green and efficient energy sources is a major challenge. As a consequence, the use of photovoltaic devices for conversion of light into electricity is growing worldwide. A lot of effort had been invested to create high-efficient solar cells, but their durability, stability, flexibility and efficiency at low light intensities are still unexplored. Here, we built a flexible solar cell made of p-doped, amorphized a-undoped and n-doped Sb2S3 solid carrier loaded with electrolyte. Indium tin oxide glass was the working electrode, and aluminium was the counter electrode. Every (p-a-n) flexible Sb2S3/solid carrier layers were obtained using a cheap casting/solvent evaporation technique, from a blend consisted of chitosan, polyethylene glycol and electrolyte containing 0.5 M potassium iodide and 0.05 M iodine, and corresponding synthesized amorphized a-undoped and p and n-doped Sb2S3 semiconductor. Results show that flexible Sb2S3 solar cell possesses good stability and efficiency of about 10% at 5% sun. Overall, our findings demonstrate for the first time that flexible solar cell can be made and used for low light intensity applications.
T2  - Environmental Chemistry Letters
T1  - Flexible and high-efficiency Sb2S3/solid carrier solar cell at low light intensity
VL  - 16
IS  - 2
SP  - 659
EP  - 664
DO  - 10.1007/s10311-017-0702-7
ER  - 

@article{
author = "Lojpur, Vesna and Krstić, Jelena and Kačarević-Popović, Zorica M. and Filipović, Nenad and Validžić, Ivana Lj.",
year = "2018",
abstract = "Producing green and efficient energy sources is a major challenge. As a consequence, the use of photovoltaic devices for conversion of light into electricity is growing worldwide. A lot of effort had been invested to create high-efficient solar cells, but their durability, stability, flexibility and efficiency at low light intensities are still unexplored. Here, we built a flexible solar cell made of p-doped, amorphized a-undoped and n-doped Sb2S3 solid carrier loaded with electrolyte. Indium tin oxide glass was the working electrode, and aluminium was the counter electrode. Every (p-a-n) flexible Sb2S3/solid carrier layers were obtained using a cheap casting/solvent evaporation technique, from a blend consisted of chitosan, polyethylene glycol and electrolyte containing 0.5 M potassium iodide and 0.05 M iodine, and corresponding synthesized amorphized a-undoped and p and n-doped Sb2S3 semiconductor. Results show that flexible Sb2S3 solar cell possesses good stability and efficiency of about 10% at 5% sun. Overall, our findings demonstrate for the first time that flexible solar cell can be made and used for low light intensity applications.",
journal = "Environmental Chemistry Letters",
title = "Flexible and high-efficiency Sb2S3/solid carrier solar cell at low light intensity",
volume = "16",
number = "2",
pages = "659-664",
doi = "10.1007/s10311-017-0702-7"
}

Lojpur, V., Krstić, J., Kačarević-Popović, Z. M., Filipović, N.,& Validžić, I. Lj.. (2018). Flexible and high-efficiency Sb2S3/solid carrier solar cell at low light intensity. in Environmental Chemistry Letters, 16(2), 659-664.
https://doi.org/10.1007/s10311-017-0702-7

Lojpur V, Krstić J, Kačarević-Popović ZM, Filipović N, Validžić IL. Flexible and high-efficiency Sb2S3/solid carrier solar cell at low light intensity. in Environmental Chemistry Letters. 2018;16(2):659-664.
doi:10.1007/s10311-017-0702-7 .

Lojpur, Vesna, Krstić, Jelena, Kačarević-Popović, Zorica M., Filipović, Nenad, Validžić, Ivana Lj., "Flexible and high-efficiency Sb2S3/solid carrier solar cell at low light intensity" in Environmental Chemistry Letters, 16, no. 2 (2018):659-664,
https://doi.org/10.1007/s10311-017-0702-7 . .

TY  - JOUR
AU  - Lojpur, Vesna
AU  - Mitrić, Miodrag
AU  - Kačarević-Popović, Zorica M.
AU  - Radosavljević, Aleksandra
AU  - Rakočević, Zlatko Lj.
AU  - Validžić, Ivana Lj.
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1810
AB  - We report here on an inexpensive, solid and stable solar cell designed and made entirely of synthesized materials, Sb2S3/ hypericin (dye) thin film on ITO-coaled glass (working electrode), aluminum (counter electrode), and PVA matrix (solid carrier) loaded, with electrolyte (0.5M KI+ 0.05M I-2). The fact, that the cell is inexpensive, hut also stable and. solid, with efficiency of around 1.3%/cm(2) at a very low light intensity of only 5% sun, makes it particularly suitable for indoor applications. At higher light, intensities of 25 and 55% sun, however, the cell exhibits lower efficiency, around 0.3 and 0.07%/cm(2), respectively. Development of low-cost cell technology combined with understanding of low light utilization and, setting of standard conditions should be some of the future directions the research in this area should, follow. Therefore, in this work, we tried to give sufficient reasons for establishing standard conditions related to low light, intensity. (C) 2017 American Institute of Chemical Engineers.
T2  - Environmental Progress and Sustainable Energy
T1  - The Role of Low Light Intensity: A Cheap, Stable, and Solidly Efficient Amorphous Sb2S3 Powder/Hypericin Composite/PVA Matrix Loaded with Electrolyte Solar Cell
VL  - 36
IS  - 5
SP  - 1507
EP  - 1516
DO  - 10.1002/ep.12597
ER  - 

@article{
author = "Lojpur, Vesna and Mitrić, Miodrag and Kačarević-Popović, Zorica M. and Radosavljević, Aleksandra and Rakočević, Zlatko Lj. and Validžić, Ivana Lj.",
year = "2017",
abstract = "We report here on an inexpensive, solid and stable solar cell designed and made entirely of synthesized materials, Sb2S3/ hypericin (dye) thin film on ITO-coaled glass (working electrode), aluminum (counter electrode), and PVA matrix (solid carrier) loaded, with electrolyte (0.5M KI+ 0.05M I-2). The fact, that the cell is inexpensive, hut also stable and. solid, with efficiency of around 1.3%/cm(2) at a very low light intensity of only 5% sun, makes it particularly suitable for indoor applications. At higher light, intensities of 25 and 55% sun, however, the cell exhibits lower efficiency, around 0.3 and 0.07%/cm(2), respectively. Development of low-cost cell technology combined with understanding of low light utilization and, setting of standard conditions should be some of the future directions the research in this area should, follow. Therefore, in this work, we tried to give sufficient reasons for establishing standard conditions related to low light, intensity. (C) 2017 American Institute of Chemical Engineers.",
journal = "Environmental Progress and Sustainable Energy",
title = "The Role of Low Light Intensity: A Cheap, Stable, and Solidly Efficient Amorphous Sb2S3 Powder/Hypericin Composite/PVA Matrix Loaded with Electrolyte Solar Cell",
volume = "36",
number = "5",
pages = "1507-1516",
doi = "10.1002/ep.12597"
}

Lojpur, V., Mitrić, M., Kačarević-Popović, Z. M., Radosavljević, A., Rakočević, Z. Lj.,& Validžić, I. Lj.. (2017). The Role of Low Light Intensity: A Cheap, Stable, and Solidly Efficient Amorphous Sb2S3 Powder/Hypericin Composite/PVA Matrix Loaded with Electrolyte Solar Cell. in Environmental Progress and Sustainable Energy, 36(5), 1507-1516.
https://doi.org/10.1002/ep.12597

Lojpur V, Mitrić M, Kačarević-Popović ZM, Radosavljević A, Rakočević ZL, Validžić IL. The Role of Low Light Intensity: A Cheap, Stable, and Solidly Efficient Amorphous Sb2S3 Powder/Hypericin Composite/PVA Matrix Loaded with Electrolyte Solar Cell. in Environmental Progress and Sustainable Energy. 2017;36(5):1507-1516.
doi:10.1002/ep.12597 .

Lojpur, Vesna, Mitrić, Miodrag, Kačarević-Popović, Zorica M., Radosavljević, Aleksandra, Rakočević, Zlatko Lj., Validžić, Ivana Lj., "The Role of Low Light Intensity: A Cheap, Stable, and Solidly Efficient Amorphous Sb2S3 Powder/Hypericin Composite/PVA Matrix Loaded with Electrolyte Solar Cell" in Environmental Progress and Sustainable Energy, 36, no. 5 (2017):1507-1516,
https://doi.org/10.1002/ep.12597 . .

TY  - JOUR
AU  - Lojpur, Vesna
AU  - Tasić, Nikola B.
AU  - Validžić, Ivana Lj.
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1388
AB  - The focus of this paper was on the different behaviors in current-voltage measurements of fabricated solar cells due to variations in scan rates (the slowest 10 mV s(-1), medium 50 mV s(-1), and the fastest 100 mV s(-1)). Three different undoped and doped antimony sulfide (Sb2S3)-based hybrids solar cells were examined under standard test conditions (1 sun) as follows: indium tin oxide glass/amorphous Sb2S3-polyaniline/TiO2/polyaniline/electrolyte/aluminum; indium tin oxide glass/p-doped Sb2S3-polyaniline/amorphous Sb2S3-polyaniline/n-doped Sb2S3-polyaniline/polyaniline/electrolyte/aluminum; and indium tin oxide glass/p-doped Sb2S3-polyaniline/aSb(2)S(3)-polyaniline/n-doped Sb2S3-polyaniline/TiO2/polyaniline/electrolyte/aluminum. Different current-voltage curves changing from inverse exponential, linear to exponential ones with different rates of measurement scans at 1 sun were recorded. The obtained results also show basic cell characteristics such as fill factor, short-circuit current, efficiency, series, and shunt resistances. The highest efficiencies of all three cells were obtained at the slowest scan rate, while values of the shunt and series resistances are in agreement with the shape of the curves. On the other hand, one example of measurement at lower light intensity (55% of sun) was given, indicating more stable cell performances and the exponential shape of current-voltage curves at all scan rates.
T2  - Journal of Applied Electrochemistry
T1  - Different behaviors in current-voltage measurements of undoped and doped Sb2S3-based solar cells
VL  - 47
IS  - 1
SP  - 117
EP  - 124
DO  - 10.1007/s10800-016-1025-2
ER  - 

@article{
author = "Lojpur, Vesna and Tasić, Nikola B. and Validžić, Ivana Lj.",
year = "2017",
abstract = "The focus of this paper was on the different behaviors in current-voltage measurements of fabricated solar cells due to variations in scan rates (the slowest 10 mV s(-1), medium 50 mV s(-1), and the fastest 100 mV s(-1)). Three different undoped and doped antimony sulfide (Sb2S3)-based hybrids solar cells were examined under standard test conditions (1 sun) as follows: indium tin oxide glass/amorphous Sb2S3-polyaniline/TiO2/polyaniline/electrolyte/aluminum; indium tin oxide glass/p-doped Sb2S3-polyaniline/amorphous Sb2S3-polyaniline/n-doped Sb2S3-polyaniline/polyaniline/electrolyte/aluminum; and indium tin oxide glass/p-doped Sb2S3-polyaniline/aSb(2)S(3)-polyaniline/n-doped Sb2S3-polyaniline/TiO2/polyaniline/electrolyte/aluminum. Different current-voltage curves changing from inverse exponential, linear to exponential ones with different rates of measurement scans at 1 sun were recorded. The obtained results also show basic cell characteristics such as fill factor, short-circuit current, efficiency, series, and shunt resistances. The highest efficiencies of all three cells were obtained at the slowest scan rate, while values of the shunt and series resistances are in agreement with the shape of the curves. On the other hand, one example of measurement at lower light intensity (55% of sun) was given, indicating more stable cell performances and the exponential shape of current-voltage curves at all scan rates.",
journal = "Journal of Applied Electrochemistry",
title = "Different behaviors in current-voltage measurements of undoped and doped Sb2S3-based solar cells",
volume = "47",
number = "1",
pages = "117-124",
doi = "10.1007/s10800-016-1025-2"
}

Lojpur, V., Tasić, N. B.,& Validžić, I. Lj.. (2017). Different behaviors in current-voltage measurements of undoped and doped Sb2S3-based solar cells. in Journal of Applied Electrochemistry, 47(1), 117-124.
https://doi.org/10.1007/s10800-016-1025-2

Lojpur V, Tasić NB, Validžić IL. Different behaviors in current-voltage measurements of undoped and doped Sb2S3-based solar cells. in Journal of Applied Electrochemistry. 2017;47(1):117-124.
doi:10.1007/s10800-016-1025-2 .

Lojpur, Vesna, Tasić, Nikola B., Validžić, Ivana Lj., "Different behaviors in current-voltage measurements of undoped and doped Sb2S3-based solar cells" in Journal of Applied Electrochemistry, 47, no. 1 (2017):117-124,
https://doi.org/10.1007/s10800-016-1025-2 . .

TY  - JOUR
AU  - Janošević, Valentina
AU  - Mitrić, Miodrag
AU  - Bundaleski, Nenad
AU  - Rakočević, Zlatko Lj.
AU  - Validžić, Ivana Lj.
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1002
AB  - Cu-doped (as p-doped) and Se-doped (as n-doped) Sb2S3 were synthesized from undoped Sb2S3 using a newly developed technique, simple colloidal synthesis method. X-ray diffraction measurements detected no peaks related to any of the Cu and Se compounds in Cu and Se-doped samples. Energy dispersive X-ray analysis, however, confirmed the presence of Cu and Se ions in the doped samples. Diffuse reflectance spectroscopy revealed the optical band gap energy changes because of doping effect, as reported for both the p-type and the n-type material. The valence-band X-ray photoelectron spectroscopy data showed a significant shift in the valence band to higher (Se-doped; +0.53eV) and a shift to lower (Cu-doped; -0.41eV) binding energy, respectively, when compared with the undoped sample. We report here on an inexpensive solar cell designed and made entirely of a synthesized material (indium tin oxide/p-doped Sb2S3+polyaniline (PANI)/amorphous/undoped Sb2S3+PANI/n-doped Sb2S3+PANI/PANI/electrolyte (0.5M KI+0.05M I-2)/Al). The cell has a high efficiency of 8% to 9% at a very low light intensity of only 5% sun, which makes it particularly suitable for indoor applications. As found, the cell performance at the intensity of 5% sun is governed by high shunt resistance (R-SH) only, which satisfies standard testing conditions. At higher light intensities (25% sun), however, the cell exhibits lower but not insignificant efficiency (around 2%) governed by both the series (R-S) and the R-SH. Minimal permeability in the UV region (up to 375nm) and its almost constant value in the visible and the NIR region at low light intensity of 5% sun could be the reasons for higher cell efficiency. Copyright (c) 2015 John Wiley and Sons, Ltd.
T2  - Progress in Photovoltaics
T1  - High-efficiency Sb2S3-based hybrid solar cell at low light intensity: cell made of synthesized Cu and Se-doped Sb2S3
VL  - 24
IS  - 5
SP  - 704
EP  - 715
DO  - 10.1002/pip.2724
ER  - 

@article{
author = "Janošević, Valentina and Mitrić, Miodrag and Bundaleski, Nenad and Rakočević, Zlatko Lj. and Validžić, Ivana Lj.",
year = "2016",
abstract = "Cu-doped (as p-doped) and Se-doped (as n-doped) Sb2S3 were synthesized from undoped Sb2S3 using a newly developed technique, simple colloidal synthesis method. X-ray diffraction measurements detected no peaks related to any of the Cu and Se compounds in Cu and Se-doped samples. Energy dispersive X-ray analysis, however, confirmed the presence of Cu and Se ions in the doped samples. Diffuse reflectance spectroscopy revealed the optical band gap energy changes because of doping effect, as reported for both the p-type and the n-type material. The valence-band X-ray photoelectron spectroscopy data showed a significant shift in the valence band to higher (Se-doped; +0.53eV) and a shift to lower (Cu-doped; -0.41eV) binding energy, respectively, when compared with the undoped sample. We report here on an inexpensive solar cell designed and made entirely of a synthesized material (indium tin oxide/p-doped Sb2S3+polyaniline (PANI)/amorphous/undoped Sb2S3+PANI/n-doped Sb2S3+PANI/PANI/electrolyte (0.5M KI+0.05M I-2)/Al). The cell has a high efficiency of 8% to 9% at a very low light intensity of only 5% sun, which makes it particularly suitable for indoor applications. As found, the cell performance at the intensity of 5% sun is governed by high shunt resistance (R-SH) only, which satisfies standard testing conditions. At higher light intensities (25% sun), however, the cell exhibits lower but not insignificant efficiency (around 2%) governed by both the series (R-S) and the R-SH. Minimal permeability in the UV region (up to 375nm) and its almost constant value in the visible and the NIR region at low light intensity of 5% sun could be the reasons for higher cell efficiency. Copyright (c) 2015 John Wiley and Sons, Ltd.",
journal = "Progress in Photovoltaics",
title = "High-efficiency Sb2S3-based hybrid solar cell at low light intensity: cell made of synthesized Cu and Se-doped Sb2S3",
volume = "24",
number = "5",
pages = "704-715",
doi = "10.1002/pip.2724"
}

Janošević, V., Mitrić, M., Bundaleski, N., Rakočević, Z. Lj.,& Validžić, I. Lj.. (2016). High-efficiency Sb2S3-based hybrid solar cell at low light intensity: cell made of synthesized Cu and Se-doped Sb2S3. in Progress in Photovoltaics, 24(5), 704-715.
https://doi.org/10.1002/pip.2724

Janošević V, Mitrić M, Bundaleski N, Rakočević ZL, Validžić IL. High-efficiency Sb2S3-based hybrid solar cell at low light intensity: cell made of synthesized Cu and Se-doped Sb2S3. in Progress in Photovoltaics. 2016;24(5):704-715.
doi:10.1002/pip.2724 .

Janošević, Valentina, Mitrić, Miodrag, Bundaleski, Nenad, Rakočević, Zlatko Lj., Validžić, Ivana Lj., "High-efficiency Sb2S3-based hybrid solar cell at low light intensity: cell made of synthesized Cu and Se-doped Sb2S3" in Progress in Photovoltaics, 24, no. 5 (2016):704-715,
https://doi.org/10.1002/pip.2724 . .

TY  - JOUR
AU  - Janošević, Valentina
AU  - Mitrić, Miodrag
AU  - Savić, Jasmina
AU  - Validžić, Ivana Lj.
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/957
AB  - One of the intermediate steps in the organo-colloidal synthesis of crystalline Sb2S3 is a synthesis of spherical amorphous Sb2S3. In order to prove that the synthesized semiconductor can be considered an absorbing material for a solar device, the electronic and photovoltage properties of the amorphized and polycrystalline Sb2S3 thin films deposited by synthesized amorphous nanoparticles were studied. Optical studies revealed that the direct band gap energy was 1.65 eV and, two direct allowed transition of 1.57 and 1.91 eV for polycrystalline and amorphized thin films, respectively. The PL spectra of Sb2S3 showed an emission peak at 1.65 eV for both films. In order to obtain current-voltage (I-V) characteristics, two cells based on the Sb2S3 thin films as both an absorbing material and an electrolyte were designed and made. The observed Sb2S3 thin films, with a thickness of around 10 mu m, are of p-type. The exponential growth of the I-V curves reveals that the cells can work as a generator of electricity. (C) The Minerals, Metals and Materials Society and ASM International 2015
PB  - Springer
T2  - Metallurgical and Materials Transactions. A: Physical Metallurgy and Materials Science
T1  - Structural, Optical, and Electrical Properties of Applied Amorphized and Polycrystalline Sb2S3 Thin Films
VL  - 47A
IS  - 3
SP  - 1460
EP  - 1468
DO  - 10.1007/s11661-015-3282-9
ER  - 

@article{
author = "Janošević, Valentina and Mitrić, Miodrag and Savić, Jasmina and Validžić, Ivana Lj.",
year = "2016",
abstract = "One of the intermediate steps in the organo-colloidal synthesis of crystalline Sb2S3 is a synthesis of spherical amorphous Sb2S3. In order to prove that the synthesized semiconductor can be considered an absorbing material for a solar device, the electronic and photovoltage properties of the amorphized and polycrystalline Sb2S3 thin films deposited by synthesized amorphous nanoparticles were studied. Optical studies revealed that the direct band gap energy was 1.65 eV and, two direct allowed transition of 1.57 and 1.91 eV for polycrystalline and amorphized thin films, respectively. The PL spectra of Sb2S3 showed an emission peak at 1.65 eV for both films. In order to obtain current-voltage (I-V) characteristics, two cells based on the Sb2S3 thin films as both an absorbing material and an electrolyte were designed and made. The observed Sb2S3 thin films, with a thickness of around 10 mu m, are of p-type. The exponential growth of the I-V curves reveals that the cells can work as a generator of electricity. (C) The Minerals, Metals and Materials Society and ASM International 2015",
publisher = "Springer",
journal = "Metallurgical and Materials Transactions. A: Physical Metallurgy and Materials Science",
title = "Structural, Optical, and Electrical Properties of Applied Amorphized and Polycrystalline Sb2S3 Thin Films",
volume = "47A",
number = "3",
pages = "1460-1468",
doi = "10.1007/s11661-015-3282-9"
}

Janošević, V., Mitrić, M., Savić, J.,& Validžić, I. Lj.. (2016). Structural, Optical, and Electrical Properties of Applied Amorphized and Polycrystalline Sb2S3 Thin Films. in Metallurgical and Materials Transactions. A: Physical Metallurgy and Materials Science
Springer., 47A(3), 1460-1468.
https://doi.org/10.1007/s11661-015-3282-9

Janošević V, Mitrić M, Savić J, Validžić IL. Structural, Optical, and Electrical Properties of Applied Amorphized and Polycrystalline Sb2S3 Thin Films. in Metallurgical and Materials Transactions. A: Physical Metallurgy and Materials Science. 2016;47A(3):1460-1468.
doi:10.1007/s11661-015-3282-9 .

Janošević, Valentina, Mitrić, Miodrag, Savić, Jasmina, Validžić, Ivana Lj., "Structural, Optical, and Electrical Properties of Applied Amorphized and Polycrystalline Sb2S3 Thin Films" in Metallurgical and Materials Transactions. A: Physical Metallurgy and Materials Science, 47A, no. 3 (2016):1460-1468,
https://doi.org/10.1007/s11661-015-3282-9 . .

TY  - JOUR
AU  - Janošević, Valentina
AU  - Mitrić, Miodrag
AU  - Ležaić Janošević, Aleksandra 
AU  - Validžić, Ivana Lj.
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/967
AB  - We report here on an inexpensive solar cell made entirely of a synthesized material (indium tin oxide/amorphous Sb2S3 + polyaniline composite/TiO2/electrolyte). The cell has a solid efficiency of around 2.5% at very low light intensity of only 5% sun, which makes it particularly suitable for indoor applications. As found, the cell performance at intensity of 5% sun is governed by high shunt resistance only. At higher light intensities (25% sun), however, the cell has lower efficiency (around 0.8%), governed by both series and shunt resistance. An initial decrease in the fill factor with the light intensity decrease is not sufficient to cause reduction in the cell efficiency, due to slight variations in voltage and current. A minimal permeability in the ultraviolet (UV) region and its almost constant value in the visible and near-infrared regions at low light intensity of 5% sun could be the reason for higher cell efficiency.
T2  - IEEE Journal of Photovoltaics
T1  - Weak Light Performance of Synthesized Amorphous Sb2S3-Based Hybrid Solar Cell
VL  - 6
IS  - 2
SP  - 473
EP  - 479
DO  - 10.1109/JPHOTOV.2015.2501731
ER  - 

@article{
author = "Janošević, Valentina and Mitrić, Miodrag and Ležaić Janošević, Aleksandra  and Validžić, Ivana Lj.",
year = "2016",
abstract = "We report here on an inexpensive solar cell made entirely of a synthesized material (indium tin oxide/amorphous Sb2S3 + polyaniline composite/TiO2/electrolyte). The cell has a solid efficiency of around 2.5% at very low light intensity of only 5% sun, which makes it particularly suitable for indoor applications. As found, the cell performance at intensity of 5% sun is governed by high shunt resistance only. At higher light intensities (25% sun), however, the cell has lower efficiency (around 0.8%), governed by both series and shunt resistance. An initial decrease in the fill factor with the light intensity decrease is not sufficient to cause reduction in the cell efficiency, due to slight variations in voltage and current. A minimal permeability in the ultraviolet (UV) region and its almost constant value in the visible and near-infrared regions at low light intensity of 5% sun could be the reason for higher cell efficiency.",
journal = "IEEE Journal of Photovoltaics",
title = "Weak Light Performance of Synthesized Amorphous Sb2S3-Based Hybrid Solar Cell",
volume = "6",
number = "2",
pages = "473-479",
doi = "10.1109/JPHOTOV.2015.2501731"
}

Janošević, V., Mitrić, M., Ležaić Janošević, A.,& Validžić, I. Lj.. (2016). Weak Light Performance of Synthesized Amorphous Sb2S3-Based Hybrid Solar Cell. in IEEE Journal of Photovoltaics, 6(2), 473-479.
https://doi.org/10.1109/JPHOTOV.2015.2501731

Janošević V, Mitrić M, Ležaić Janošević A, Validžić IL. Weak Light Performance of Synthesized Amorphous Sb2S3-Based Hybrid Solar Cell. in IEEE Journal of Photovoltaics. 2016;6(2):473-479.
doi:10.1109/JPHOTOV.2015.2501731 .

Janošević, Valentina, Mitrić, Miodrag, Ležaić Janošević, Aleksandra , Validžić, Ivana Lj., "Weak Light Performance of Synthesized Amorphous Sb2S3-Based Hybrid Solar Cell" in IEEE Journal of Photovoltaics, 6, no. 2 (2016):473-479,
https://doi.org/10.1109/JPHOTOV.2015.2501731 . .

TY  - JOUR
AU  - Validžić, Ivana Lj.
AU  - Janošević, Valentina
AU  - Mitrić, Miodrag
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/987
AB  - Recently, we have reported the synthesis and optical and electronic properties of Sb2S3 nanowires with small band gap. In order to prove that the synthesized nanowires can be considered as a candidate material for solar cells and in order to obtain I-V characteristics, two very simple cells based on synthesized Sb2S3 nanowires/natural dye composite were fabricated. Exponential growth of the I-V curves after illumination revealed that the cells could work as electricity generators. A better current response was observed for the cell made of synthesized powder with smaller band gap. The efficiency of the cells is quite low, but this was an attempt to create a solar cell in order to better understand the properties of the synthesized Sb2S3 semiconductor and the processes that occur in the cell. (c) 2015 American Institute of Chemical Engineers Environ Prog, 35: 512-516, 2016
T2  - Environmental Progress and Sustainable Energy
T1  - Characterization and current-voltage characteristics of solar cells based on the composite of synthesized Sb2S3 powder with small band gap and natural dye
VL  - 35
IS  - 2
SP  - 512
EP  - 516
DO  - 10.1002/ep.12221
ER  - 

@article{
author = "Validžić, Ivana Lj. and Janošević, Valentina and Mitrić, Miodrag",
year = "2016",
abstract = "Recently, we have reported the synthesis and optical and electronic properties of Sb2S3 nanowires with small band gap. In order to prove that the synthesized nanowires can be considered as a candidate material for solar cells and in order to obtain I-V characteristics, two very simple cells based on synthesized Sb2S3 nanowires/natural dye composite were fabricated. Exponential growth of the I-V curves after illumination revealed that the cells could work as electricity generators. A better current response was observed for the cell made of synthesized powder with smaller band gap. The efficiency of the cells is quite low, but this was an attempt to create a solar cell in order to better understand the properties of the synthesized Sb2S3 semiconductor and the processes that occur in the cell. (c) 2015 American Institute of Chemical Engineers Environ Prog, 35: 512-516, 2016",
journal = "Environmental Progress and Sustainable Energy",
title = "Characterization and current-voltage characteristics of solar cells based on the composite of synthesized Sb2S3 powder with small band gap and natural dye",
volume = "35",
number = "2",
pages = "512-516",
doi = "10.1002/ep.12221"
}

Validžić, I. Lj., Janošević, V.,& Mitrić, M.. (2016). Characterization and current-voltage characteristics of solar cells based on the composite of synthesized Sb2S3 powder with small band gap and natural dye. in Environmental Progress and Sustainable Energy, 35(2), 512-516.
https://doi.org/10.1002/ep.12221

Validžić IL, Janošević V, Mitrić M. Characterization and current-voltage characteristics of solar cells based on the composite of synthesized Sb2S3 powder with small band gap and natural dye. in Environmental Progress and Sustainable Energy. 2016;35(2):512-516.
doi:10.1002/ep.12221 .

Validžić, Ivana Lj., Janošević, Valentina, Mitrić, Miodrag, "Characterization and current-voltage characteristics of solar cells based on the composite of synthesized Sb2S3 powder with small band gap and natural dye" in Environmental Progress and Sustainable Energy, 35, no. 2 (2016):512-516,
https://doi.org/10.1002/ep.12221 . .

TY  - CONF
AU  - Janošević, Valentina
AU  - Mitrić, Miodrag
AU  - Validžić, Ivana Lj.
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10893
AB  - Cu-doped (as p-doped) and Se-doped (as n-doped) Sb2S3 were synthesized from undoped Sb2S3 using a newly developed technique, simple colloidal synthesis method. X-ray diffraction measurements detected no peaks related to any of the Cu and Se compounds in Cu and Se doped samples. Energy dispersive x-ray analysis, however, confirmed the presence of Cu and Se ions in the doped samples. Diffuse reflectance spectroscopy revealed the optical band gap energy changes due to doping effect, as reported for both the p-type and the n-type material. The valence-band X-ray photoelectron spectroscopy data showed a significant shift in the valence band to higher (Se-doped; +0.53 eV), and a shift to lower (Cu-doped; -0.41 eV) binding energy respectively, when compared to the undoped sample. We report here on an inexpensive solar cell designed and made entirely of a synthesized material (ITO/p-doped Sb2S3 + PANI/amorphous/undoped Sb2S3 + PANI/n-doped Sb2S3 + PANI/ PANI / electrolyte (0.5 M KI + 0.05 M I2)/Al). The cell has a high efficiency of 8-9 % at a very low light intensity of only 5% sun, which makes it particularly suitable for indoor applications. As found, the cell performance at the intensity of 5 % sun is governed by high shunt resistance (RSH) only, which satisfies standard testing conditions (STC). At higher light intensities (25 % sun), however, the cell exhibits lower but not insignificant efficiency (around 2 %) governed by both the series (RS) and the shunt resistance (RSH). Minimal permeability in the UV region (up to 375 nm) and its almost constant value in the visible and the NIR region at low light intensity of 5% sun could be the reason for higher cell efficiency
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : 4th Serbian Ceramic Society Conference : program and the book of abstracts; September 21-23, 2015; Belgrade
T1  - High efficiency Sb2S3-based hybrid solar cell at low light intensity: cell made of synthesized Cu and Se doped Sb2S3
SP  - 52
UR  - https://hdl.handle.net/21.15107/rcub_vinar_10893
ER  - 

@conference{
author = "Janošević, Valentina and Mitrić, Miodrag and Validžić, Ivana Lj.",
year = "2015",
abstract = "Cu-doped (as p-doped) and Se-doped (as n-doped) Sb2S3 were synthesized from undoped Sb2S3 using a newly developed technique, simple colloidal synthesis method. X-ray diffraction measurements detected no peaks related to any of the Cu and Se compounds in Cu and Se doped samples. Energy dispersive x-ray analysis, however, confirmed the presence of Cu and Se ions in the doped samples. Diffuse reflectance spectroscopy revealed the optical band gap energy changes due to doping effect, as reported for both the p-type and the n-type material. The valence-band X-ray photoelectron spectroscopy data showed a significant shift in the valence band to higher (Se-doped; +0.53 eV), and a shift to lower (Cu-doped; -0.41 eV) binding energy respectively, when compared to the undoped sample. We report here on an inexpensive solar cell designed and made entirely of a synthesized material (ITO/p-doped Sb2S3 + PANI/amorphous/undoped Sb2S3 + PANI/n-doped Sb2S3 + PANI/ PANI / electrolyte (0.5 M KI + 0.05 M I2)/Al). The cell has a high efficiency of 8-9 % at a very low light intensity of only 5% sun, which makes it particularly suitable for indoor applications. As found, the cell performance at the intensity of 5 % sun is governed by high shunt resistance (RSH) only, which satisfies standard testing conditions (STC). At higher light intensities (25 % sun), however, the cell exhibits lower but not insignificant efficiency (around 2 %) governed by both the series (RS) and the shunt resistance (RSH). Minimal permeability in the UV region (up to 375 nm) and its almost constant value in the visible and the NIR region at low light intensity of 5% sun could be the reason for higher cell efficiency",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : 4th Serbian Ceramic Society Conference : program and the book of abstracts; September 21-23, 2015; Belgrade",
title = "High efficiency Sb2S3-based hybrid solar cell at low light intensity: cell made of synthesized Cu and Se doped Sb2S3",
pages = "52",
url = "https://hdl.handle.net/21.15107/rcub_vinar_10893"
}

Janošević, V., Mitrić, M.,& Validžić, I. Lj.. (2015). High efficiency Sb2S3-based hybrid solar cell at low light intensity: cell made of synthesized Cu and Se doped Sb2S3. in Advanced Ceramics and Application : 4th Serbian Ceramic Society Conference : program and the book of abstracts; September 21-23, 2015; Belgrade
Belgrade : Serbian Ceramic Society., 52.
https://hdl.handle.net/21.15107/rcub_vinar_10893

Janošević V, Mitrić M, Validžić IL. High efficiency Sb2S3-based hybrid solar cell at low light intensity: cell made of synthesized Cu and Se doped Sb2S3. in Advanced Ceramics and Application : 4th Serbian Ceramic Society Conference : program and the book of abstracts; September 21-23, 2015; Belgrade. 2015;:52.
https://hdl.handle.net/21.15107/rcub_vinar_10893 .

Janošević, Valentina, Mitrić, Miodrag, Validžić, Ivana Lj., "High efficiency Sb2S3-based hybrid solar cell at low light intensity: cell made of synthesized Cu and Se doped Sb2S3" in Advanced Ceramics and Application : 4th Serbian Ceramic Society Conference : program and the book of abstracts; September 21-23, 2015; Belgrade (2015):52,
https://hdl.handle.net/21.15107/rcub_vinar_10893 .

TY  - CONF
AU  - Validžić, Ivana Lj.
AU  - Janošević, Valentina
AU  - Mitrić, Miodrag
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10894
AB  - Recently, we have reported the synthesis and optical and electronic properties of Sb2S3 nanowires with small band gap. In order to prove that the synthesized nanowires can be considered as a candidate material for solar cells and in order to obtain I-V characteristics, two very simple cells based on synthesized Sb2S3 nanowires/natural dye composite were fabricated. Exponential growth of the I-V curves after illumination revealed that the cells could work as electricity generators. A better current response was observed for the cell made of synthesized powder with smaller band gap. The efficiency of the cells is quite low, but this was an attempt to create a solar cell in order to better understand the properties of the synthesized Sb2S3 semiconductor and the processes that occur in the cell.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : 4th Serbian Ceramic Society Conference : program and the book of abstracts; September 21-23, 2015; Belgrade
T1  - Characterization and current-voltage characteristics of solar cells based on the composite of synthesized Sb2S3 powder with small band gap and natural dye
SP  - 73
EP  - 74
UR  - https://hdl.handle.net/21.15107/rcub_vinar_10894
ER  - 

@conference{
author = "Validžić, Ivana Lj. and Janošević, Valentina and Mitrić, Miodrag",
year = "2015",
abstract = "Recently, we have reported the synthesis and optical and electronic properties of Sb2S3 nanowires with small band gap. In order to prove that the synthesized nanowires can be considered as a candidate material for solar cells and in order to obtain I-V characteristics, two very simple cells based on synthesized Sb2S3 nanowires/natural dye composite were fabricated. Exponential growth of the I-V curves after illumination revealed that the cells could work as electricity generators. A better current response was observed for the cell made of synthesized powder with smaller band gap. The efficiency of the cells is quite low, but this was an attempt to create a solar cell in order to better understand the properties of the synthesized Sb2S3 semiconductor and the processes that occur in the cell.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : 4th Serbian Ceramic Society Conference : program and the book of abstracts; September 21-23, 2015; Belgrade",
title = "Characterization and current-voltage characteristics of solar cells based on the composite of synthesized Sb2S3 powder with small band gap and natural dye",
pages = "73-74",
url = "https://hdl.handle.net/21.15107/rcub_vinar_10894"
}

Validžić, I. Lj., Janošević, V.,& Mitrić, M.. (2015). Characterization and current-voltage characteristics of solar cells based on the composite of synthesized Sb2S3 powder with small band gap and natural dye. in Advanced Ceramics and Application : 4th Serbian Ceramic Society Conference : program and the book of abstracts; September 21-23, 2015; Belgrade
Belgrade : Serbian Ceramic Society., 73-74.
https://hdl.handle.net/21.15107/rcub_vinar_10894

Validžić IL, Janošević V, Mitrić M. Characterization and current-voltage characteristics of solar cells based on the composite of synthesized Sb2S3 powder with small band gap and natural dye. in Advanced Ceramics and Application : 4th Serbian Ceramic Society Conference : program and the book of abstracts; September 21-23, 2015; Belgrade. 2015;:73-74.
https://hdl.handle.net/21.15107/rcub_vinar_10894 .

Validžić, Ivana Lj., Janošević, Valentina, Mitrić, Miodrag, "Characterization and current-voltage characteristics of solar cells based on the composite of synthesized Sb2S3 powder with small band gap and natural dye" in Advanced Ceramics and Application : 4th Serbian Ceramic Society Conference : program and the book of abstracts; September 21-23, 2015; Belgrade (2015):73-74,
https://hdl.handle.net/21.15107/rcub_vinar_10894 .

TY  - JOUR
AU  - Validžić, Ivana Lj.
AU  - Mitrić, Miodrag
AU  - Ahrenkiel, Scott Phillip
AU  - Čomor, Mirjana
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/620
AB  - We report the synthesis of zinc oxide (ZnO) nano-leaves and nano-rods under high and extremely high alkaline experimental conditions, via a simple and low-temperature method. By performing transmission electron microscopy it is found that the nano-leaves and nano-rods grow along the (001) direction. Anisotropic, i.e., hkl-dependent line-shape broadening is observed in ZnO powder diffraction patterns. Rietveld analysis using Fullprof with model for handling the anisotropic size-like broadening is performed on these diffraction patterns. The refinement showed that ZnO powders belong to the hexagonal ZnS structure type with space group P63mc, and confirmed that the nano-leaves and nano-rods are oriented along the (001) direction. Results of visualization in 3D of the average crystallite shape obtained from refinement of spherical harmonics coefficients showed elongated shapes in the both samples, exhibiting a slight twisting for nano-leaves. Diffuse reflectance measurements reveal that the optical band-gap energies found for the ZnO nano-leaves and nano-rods is somewhat smaller than a wide-direct band gap of 3.37 eV. We argued that well defined and strong photoluminescence (PL) bands in the visible part that belong to the defects may influence the observed displacement of a ultraviolet (UV) near-band-edge emission, and which is related with obtained slightly lower band-gap energies than the established band gap of bulk ZnO. We discuss processes behind the multicolor UV/violet/blue/green/yellow emission band in PL spectra. (C) The Minerals, Metals and Materials Society and ASM International 2015
T2  - Metallurgical and Materials Transactions. A: Physical Metallurgy and Materials Science
T1  - Microstructural Analysis and the Multicolor UV/Violet/Blue/Green/Yellow PL Observed from the Synthesized ZnO Nano-leaves and Nano-rods
VL  - 46A
IS  - 8
SP  - 3679
EP  - 3686
DO  - 10.1007/s11661-015-2961-x
ER  - 

@article{
author = "Validžić, Ivana Lj. and Mitrić, Miodrag and Ahrenkiel, Scott Phillip and Čomor, Mirjana",
year = "2015",
abstract = "We report the synthesis of zinc oxide (ZnO) nano-leaves and nano-rods under high and extremely high alkaline experimental conditions, via a simple and low-temperature method. By performing transmission electron microscopy it is found that the nano-leaves and nano-rods grow along the (001) direction. Anisotropic, i.e., hkl-dependent line-shape broadening is observed in ZnO powder diffraction patterns. Rietveld analysis using Fullprof with model for handling the anisotropic size-like broadening is performed on these diffraction patterns. The refinement showed that ZnO powders belong to the hexagonal ZnS structure type with space group P63mc, and confirmed that the nano-leaves and nano-rods are oriented along the (001) direction. Results of visualization in 3D of the average crystallite shape obtained from refinement of spherical harmonics coefficients showed elongated shapes in the both samples, exhibiting a slight twisting for nano-leaves. Diffuse reflectance measurements reveal that the optical band-gap energies found for the ZnO nano-leaves and nano-rods is somewhat smaller than a wide-direct band gap of 3.37 eV. We argued that well defined and strong photoluminescence (PL) bands in the visible part that belong to the defects may influence the observed displacement of a ultraviolet (UV) near-band-edge emission, and which is related with obtained slightly lower band-gap energies than the established band gap of bulk ZnO. We discuss processes behind the multicolor UV/violet/blue/green/yellow emission band in PL spectra. (C) The Minerals, Metals and Materials Society and ASM International 2015",
journal = "Metallurgical and Materials Transactions. A: Physical Metallurgy and Materials Science",
title = "Microstructural Analysis and the Multicolor UV/Violet/Blue/Green/Yellow PL Observed from the Synthesized ZnO Nano-leaves and Nano-rods",
volume = "46A",
number = "8",
pages = "3679-3686",
doi = "10.1007/s11661-015-2961-x"
}

Validžić, I. Lj., Mitrić, M., Ahrenkiel, S. P.,& Čomor, M.. (2015). Microstructural Analysis and the Multicolor UV/Violet/Blue/Green/Yellow PL Observed from the Synthesized ZnO Nano-leaves and Nano-rods. in Metallurgical and Materials Transactions. A: Physical Metallurgy and Materials Science, 46A(8), 3679-3686.
https://doi.org/10.1007/s11661-015-2961-x

Validžić IL, Mitrić M, Ahrenkiel SP, Čomor M. Microstructural Analysis and the Multicolor UV/Violet/Blue/Green/Yellow PL Observed from the Synthesized ZnO Nano-leaves and Nano-rods. in Metallurgical and Materials Transactions. A: Physical Metallurgy and Materials Science. 2015;46A(8):3679-3686.
doi:10.1007/s11661-015-2961-x .

Validžić, Ivana Lj., Mitrić, Miodrag, Ahrenkiel, Scott Phillip, Čomor, Mirjana, "Microstructural Analysis and the Multicolor UV/Violet/Blue/Green/Yellow PL Observed from the Synthesized ZnO Nano-leaves and Nano-rods" in Metallurgical and Materials Transactions. A: Physical Metallurgy and Materials Science, 46A, no. 8 (2015):3679-3686,
https://doi.org/10.1007/s11661-015-2961-x . .

TY  - JOUR
AU  - Validžić, Ivana Lj.
AU  - Mitrić, Miodrag
AU  - Abazović, Nadica
AU  - Jokić, Bojan M.
AU  - Milošević, Aleksandar S.
AU  - Popović, Zoran S.
AU  - Vukajlović, Filip R.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5929
AB  - We report a simple colloidal synthesis of two types of Sb2S3 nanowires with small band gap and high aspect ratio. Field-emission scanning electron and transmission electron microscopies confirmed formation of high aspect ratio Sb2S3 nanowires, separated in the form of bundles and coalesced with each other in long bars. Diffuse reflectance and absorption spectroscopies revealed that the optical band-gap energies of the synthesized nanowires separated in the form of bundles are 1.56 and 1.59 eV, and coalesced with each other in long bars are 1.36 and 1.28 eV, respectively. The structure refinement showed that Sb2S3 powders belong to the orthorhombic structure with space group Pnma (no. 62). It was found that Sb2S3 nanowires separated in the form of bundles predominantly grow along the [0 1 0] direction being in the needle-like shape. The nanowires coalesced with each other in long bars rise in the form of long bars, are ribbon-like in shape and have expressed {1 0 1} facets which grow along the [0 1 0] direction. No peaks in photoluminescence spectra were observed in the spectral range from 250 to 600 nm. In order to shed more light on the experimental results concerning the band-gap energies and, in the literature generally poorly investigated electronic properties of the synthesized material, we performed theoretical calculations of the electronic structure and optical properties of the Sb2S3 samples synthesized here. This was done on the basis of density functional theory with the generalized gradient approximation, and also with an improved version of the exchange potential suggested recently by Tran and Blaha. The main characteristic is the significant improvement of the band gap value.
T2  - Semiconductor Science and Technology
T1  - Structural analysis, electronic and optical properties of the synthesized Sb2S3 nanowires with small band gap
VL  - 29
IS  - 3
DO  - 10.1088/0268-1242/29/3/035007
ER  - 

@article{
author = "Validžić, Ivana Lj. and Mitrić, Miodrag and Abazović, Nadica and Jokić, Bojan M. and Milošević, Aleksandar S. and Popović, Zoran S. and Vukajlović, Filip R.",
year = "2014",
abstract = "We report a simple colloidal synthesis of two types of Sb2S3 nanowires with small band gap and high aspect ratio. Field-emission scanning electron and transmission electron microscopies confirmed formation of high aspect ratio Sb2S3 nanowires, separated in the form of bundles and coalesced with each other in long bars. Diffuse reflectance and absorption spectroscopies revealed that the optical band-gap energies of the synthesized nanowires separated in the form of bundles are 1.56 and 1.59 eV, and coalesced with each other in long bars are 1.36 and 1.28 eV, respectively. The structure refinement showed that Sb2S3 powders belong to the orthorhombic structure with space group Pnma (no. 62). It was found that Sb2S3 nanowires separated in the form of bundles predominantly grow along the [0 1 0] direction being in the needle-like shape. The nanowires coalesced with each other in long bars rise in the form of long bars, are ribbon-like in shape and have expressed {1 0 1} facets which grow along the [0 1 0] direction. No peaks in photoluminescence spectra were observed in the spectral range from 250 to 600 nm. In order to shed more light on the experimental results concerning the band-gap energies and, in the literature generally poorly investigated electronic properties of the synthesized material, we performed theoretical calculations of the electronic structure and optical properties of the Sb2S3 samples synthesized here. This was done on the basis of density functional theory with the generalized gradient approximation, and also with an improved version of the exchange potential suggested recently by Tran and Blaha. The main characteristic is the significant improvement of the band gap value.",
journal = "Semiconductor Science and Technology",
title = "Structural analysis, electronic and optical properties of the synthesized Sb2S3 nanowires with small band gap",
volume = "29",
number = "3",
doi = "10.1088/0268-1242/29/3/035007"
}

Validžić, I. Lj., Mitrić, M., Abazović, N., Jokić, B. M., Milošević, A. S., Popović, Z. S.,& Vukajlović, F. R.. (2014). Structural analysis, electronic and optical properties of the synthesized Sb2S3 nanowires with small band gap. in Semiconductor Science and Technology, 29(3).
https://doi.org/10.1088/0268-1242/29/3/035007

Validžić IL, Mitrić M, Abazović N, Jokić BM, Milošević AS, Popović ZS, Vukajlović FR. Structural analysis, electronic and optical properties of the synthesized Sb2S3 nanowires with small band gap. in Semiconductor Science and Technology. 2014;29(3).
doi:10.1088/0268-1242/29/3/035007 .

Validžić, Ivana Lj., Mitrić, Miodrag, Abazović, Nadica, Jokić, Bojan M., Milošević, Aleksandar S., Popović, Zoran S., Vukajlović, Filip R., "Structural analysis, electronic and optical properties of the synthesized Sb2S3 nanowires with small band gap" in Semiconductor Science and Technology, 29, no. 3 (2014),
https://doi.org/10.1088/0268-1242/29/3/035007 . .

TY  - JOUR
AU  - Validžić, Ivana Lj.
AU  - Abazović, Nadica
AU  - Mitrić, Miodrag
AU  - Lalić, Milan V.
AU  - Popović, Zoran S.
AU  - Vukajlović, Filip R.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5495
AB  - We report the novel colloidal syntheses in organic media of antimony sesquioxide (Sb2O3) spherical nanoparticles (30-250 nm) and octahedron micro- and nanocrystals (100 nm-4 mu m) depending on the synthetic method conditions. It is observed that small differences in the synthetic procedure cause large differences in the very changeable morphology. The structure of Sb2O3 powders was refined down to the R-factors of 9.57, 7.44, 9.19, 9.78, and 8.30 %. The refinement showed that Sb2O3 powder belongs to the cubic crystal type with space group Fd (3) over barm (No. 227). The values of estimated standard deviations, as well as reliability factors, confirmed that the structure of Sb2O3 was well refined. Ultraviolet and visible (UV-Vis) absorption spectroscopy and diffuse reflectance measurements (DRS) reveal that the optical band gap energies found for the Sb2O3 octahedrons and nanoparticles, micro- and nanocrystals, respectively, are quite independent of the synthetic method conditions and synthesized morphology and is found to be between 4.1-4.4 eV. No peaks in both photoluminescence (PL) emission and excitation spectra have been observed for a broad spectral range, typical for this material. In order to discriminate between conflicting experimental results concerning the band gap energy of this compound, we investigated theoretically the electronic structure and optical properties of one of the cubic sesquioxide Sb2O3 samples synthesized here. This has been done on the basis of density functional theory (DFT) with the generalized gradient approximation (GGA) and improved version of exchange potential suggested recently by Tran and Blaha (TB-mBJ). The main characteristic of the calculated TB-mBJ electronic structure is the significant improvement of the band gap value, which is in perfect agreement with our experimental measurements. The real and imaginary parts of the dielectric tensor are also calculated and interpreted in terms of the obtained electronic structure.
T2  - Journal of Nanoparticle Research
T1  - Novel organo-colloidal synthesis, optical properties, and structural analysis of antimony sesquioxide nanoparticles
VL  - 15
IS  - 1
DO  - 10.1007/s11051-012-1347-x
ER  - 

@article{
author = "Validžić, Ivana Lj. and Abazović, Nadica and Mitrić, Miodrag and Lalić, Milan V. and Popović, Zoran S. and Vukajlović, Filip R.",
year = "2013",
abstract = "We report the novel colloidal syntheses in organic media of antimony sesquioxide (Sb2O3) spherical nanoparticles (30-250 nm) and octahedron micro- and nanocrystals (100 nm-4 mu m) depending on the synthetic method conditions. It is observed that small differences in the synthetic procedure cause large differences in the very changeable morphology. The structure of Sb2O3 powders was refined down to the R-factors of 9.57, 7.44, 9.19, 9.78, and 8.30 %. The refinement showed that Sb2O3 powder belongs to the cubic crystal type with space group Fd (3) over barm (No. 227). The values of estimated standard deviations, as well as reliability factors, confirmed that the structure of Sb2O3 was well refined. Ultraviolet and visible (UV-Vis) absorption spectroscopy and diffuse reflectance measurements (DRS) reveal that the optical band gap energies found for the Sb2O3 octahedrons and nanoparticles, micro- and nanocrystals, respectively, are quite independent of the synthetic method conditions and synthesized morphology and is found to be between 4.1-4.4 eV. No peaks in both photoluminescence (PL) emission and excitation spectra have been observed for a broad spectral range, typical for this material. In order to discriminate between conflicting experimental results concerning the band gap energy of this compound, we investigated theoretically the electronic structure and optical properties of one of the cubic sesquioxide Sb2O3 samples synthesized here. This has been done on the basis of density functional theory (DFT) with the generalized gradient approximation (GGA) and improved version of exchange potential suggested recently by Tran and Blaha (TB-mBJ). The main characteristic of the calculated TB-mBJ electronic structure is the significant improvement of the band gap value, which is in perfect agreement with our experimental measurements. The real and imaginary parts of the dielectric tensor are also calculated and interpreted in terms of the obtained electronic structure.",
journal = "Journal of Nanoparticle Research",
title = "Novel organo-colloidal synthesis, optical properties, and structural analysis of antimony sesquioxide nanoparticles",
volume = "15",
number = "1",
doi = "10.1007/s11051-012-1347-x"
}

Validžić, I. Lj., Abazović, N., Mitrić, M., Lalić, M. V., Popović, Z. S.,& Vukajlović, F. R.. (2013). Novel organo-colloidal synthesis, optical properties, and structural analysis of antimony sesquioxide nanoparticles. in Journal of Nanoparticle Research, 15(1).
https://doi.org/10.1007/s11051-012-1347-x

Validžić IL, Abazović N, Mitrić M, Lalić MV, Popović ZS, Vukajlović FR. Novel organo-colloidal synthesis, optical properties, and structural analysis of antimony sesquioxide nanoparticles. in Journal of Nanoparticle Research. 2013;15(1).
doi:10.1007/s11051-012-1347-x .

Validžić, Ivana Lj., Abazović, Nadica, Mitrić, Miodrag, Lalić, Milan V., Popović, Zoran S., Vukajlović, Filip R., "Novel organo-colloidal synthesis, optical properties, and structural analysis of antimony sesquioxide nanoparticles" in Journal of Nanoparticle Research, 15, no. 1 (2013),
https://doi.org/10.1007/s11051-012-1347-x . .

TY  - JOUR
AU  - Validžić, Ivana Lj.
AU  - Mitrić, Miodrag
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5306
AB  - Low-temperature method for the synthesis of novel morphology of needle-like nanoparticles of disodium dimolybdate (Na2Mo2O7) in the process of ultrasonic spray pyrolysis (USP) using aqueous solutions of thermodynamically stable molybdenum (VI) oxide clusters as precursor is described. Needle-like Na2Mo2O7 particles were obtained and collected in toluene, while centrifugation was employed to isolate solid material from solution. The scanning electron microscopy (SEM) confirmed that the morphology of the synthesized Na2Mo2O7 particles is needle-like collected into bundles. The X-ray Powder Diffraction (XRPD) analysis revealed appearance of orthorhombic Na2Mo2O7, synthesized at 300 degrees C. By comparing the XRPD pattern of the synthesized needle-like Na2Mo2O7 powder obtained in the process of USP with the XRPD pattern simulated for randomly-distributed crystallites by planes, the most prefered growth plane of needle-like nanoparticles were found.
T2  - Materials Research - Ibero-American Journal of Materials
T1  - Novel Morphology of Needle-Like Nanoparticles of Na2Mo2O7 Synthesized by Using Ultrasonic Spray Pyrolysis
VL  - 16
IS  - 1
SP  - 44
EP  - 49
DO  - 10.1590/S1516-14392012005000142
ER  - 

@article{
author = "Validžić, Ivana Lj. and Mitrić, Miodrag",
year = "2013",
abstract = "Low-temperature method for the synthesis of novel morphology of needle-like nanoparticles of disodium dimolybdate (Na2Mo2O7) in the process of ultrasonic spray pyrolysis (USP) using aqueous solutions of thermodynamically stable molybdenum (VI) oxide clusters as precursor is described. Needle-like Na2Mo2O7 particles were obtained and collected in toluene, while centrifugation was employed to isolate solid material from solution. The scanning electron microscopy (SEM) confirmed that the morphology of the synthesized Na2Mo2O7 particles is needle-like collected into bundles. The X-ray Powder Diffraction (XRPD) analysis revealed appearance of orthorhombic Na2Mo2O7, synthesized at 300 degrees C. By comparing the XRPD pattern of the synthesized needle-like Na2Mo2O7 powder obtained in the process of USP with the XRPD pattern simulated for randomly-distributed crystallites by planes, the most prefered growth plane of needle-like nanoparticles were found.",
journal = "Materials Research - Ibero-American Journal of Materials",
title = "Novel Morphology of Needle-Like Nanoparticles of Na2Mo2O7 Synthesized by Using Ultrasonic Spray Pyrolysis",
volume = "16",
number = "1",
pages = "44-49",
doi = "10.1590/S1516-14392012005000142"
}

Validžić, I. Lj.,& Mitrić, M.. (2013). Novel Morphology of Needle-Like Nanoparticles of Na2Mo2O7 Synthesized by Using Ultrasonic Spray Pyrolysis. in Materials Research - Ibero-American Journal of Materials, 16(1), 44-49.
https://doi.org/10.1590/S1516-14392012005000142

Validžić IL, Mitrić M. Novel Morphology of Needle-Like Nanoparticles of Na2Mo2O7 Synthesized by Using Ultrasonic Spray Pyrolysis. in Materials Research - Ibero-American Journal of Materials. 2013;16(1):44-49.
doi:10.1590/S1516-14392012005000142 .

Validžić, Ivana Lj., Mitrić, Miodrag, "Novel Morphology of Needle-Like Nanoparticles of Na2Mo2O7 Synthesized by Using Ultrasonic Spray Pyrolysis" in Materials Research - Ibero-American Journal of Materials, 16, no. 1 (2013):44-49,
https://doi.org/10.1590/S1516-14392012005000142 . .