TY  - JOUR
AU  - Gavrilović, Tamara V.
AU  - Periša, Jovana
AU  - Ristić, Zoran
AU  - Elzbieciak-Piecka, Karolina
AU  - Marciniak, Lukasz
AU  - Ma, Chong-Geng
AU  - Antić, Željka
AU  - Dramićanin, Miroslav
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10429
AB  - We demonstrate the thermal history forensic measurements founded on the emission intensity ratio of Eu3+-doped yttrium vanadate. An increase in phosphor’s crystallite size with annealing temperature is observed, causing a significant and permanent increase in the emission intensity and symmetry ratio (ratio of Eu3+ 5D0 → 7F1 and 5D0 → 7F2 emissions). This ratio is used as a forensic indicator of the maximal temperature to which phosphor was exposed. Additionally, we demonstrated that irreversible change in the symmetry ratio after exposure to high temperatures is insensitive to the exposure time. Finally, it is shown that thermal history readings can be performed at any temperature. The applicative potential of the proposed approach was confirmed in the proof-of-concept experiment on a steel plate covered with phosphor and exposed to high temperatures.
T2  - Measurement
T1  - Thermal history forensics using the emission intensity ratio of YVO4:Eu3+ phosphor
VL  - 202
SP  - 111942
DO  - 10.1016/j.measurement.2022.111942
ER  - 

@article{
author = "Gavrilović, Tamara V. and Periša, Jovana and Ristić, Zoran and Elzbieciak-Piecka, Karolina and Marciniak, Lukasz and Ma, Chong-Geng and Antić, Željka and Dramićanin, Miroslav",
year = "2022",
abstract = "We demonstrate the thermal history forensic measurements founded on the emission intensity ratio of Eu3+-doped yttrium vanadate. An increase in phosphor’s crystallite size with annealing temperature is observed, causing a significant and permanent increase in the emission intensity and symmetry ratio (ratio of Eu3+ 5D0 → 7F1 and 5D0 → 7F2 emissions). This ratio is used as a forensic indicator of the maximal temperature to which phosphor was exposed. Additionally, we demonstrated that irreversible change in the symmetry ratio after exposure to high temperatures is insensitive to the exposure time. Finally, it is shown that thermal history readings can be performed at any temperature. The applicative potential of the proposed approach was confirmed in the proof-of-concept experiment on a steel plate covered with phosphor and exposed to high temperatures.",
journal = "Measurement",
title = "Thermal history forensics using the emission intensity ratio of YVO4:Eu3+ phosphor",
volume = "202",
pages = "111942",
doi = "10.1016/j.measurement.2022.111942"
}

Gavrilović, T. V., Periša, J., Ristić, Z., Elzbieciak-Piecka, K., Marciniak, L., Ma, C., Antić, Ž.,& Dramićanin, M.. (2022). Thermal history forensics using the emission intensity ratio of YVO4:Eu3+ phosphor. in Measurement, 202, 111942.
https://doi.org/10.1016/j.measurement.2022.111942

Gavrilović TV, Periša J, Ristić Z, Elzbieciak-Piecka K, Marciniak L, Ma C, Antić Ž, Dramićanin M. Thermal history forensics using the emission intensity ratio of YVO4:Eu3+ phosphor. in Measurement. 2022;202:111942.
doi:10.1016/j.measurement.2022.111942 .

Gavrilović, Tamara V., Periša, Jovana, Ristić, Zoran, Elzbieciak-Piecka, Karolina, Marciniak, Lukasz, Ma, Chong-Geng, Antić, Željka, Dramićanin, Miroslav, "Thermal history forensics using the emission intensity ratio of YVO4:Eu3+ phosphor" in Measurement, 202 (2022):111942,
https://doi.org/10.1016/j.measurement.2022.111942 . .

TY  - JOUR
AU  - Ćirić, Aleksandar
AU  - Gavrilović, Tamara
AU  - Dramićanin, Miroslav
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12915
AB  - The figures of merit of luminescence intensity ratio (LIR) thermometry for Er3+ in 40 different crystals and glasses have been calculated and compared. For calculations, the relevant data has been collected from the literature while the missing data were derived from available absorption and emission spectra. The calculated parameters include Judd–Ofelt parameters, refractive indexes, Slater integrals, spin–orbit coupling parameters, reduced matrix elements (RMEs), energy differences between emitting levels used for LIR, absolute, and relative sensitivities. We found a slight variation of RMEs between hosts because of variations in values of Slater integrals and spin–orbit coupling parameters, and we calculated their average values over 40 hosts. The calculations showed that crystals perform better than glasses in Er3+-based thermometry, and we identified hosts that have large values of both absolute and relative sensitivity.
T2  - Crystals
T1  - Luminescence Intensity Ratio Thermometry with Er3+: Performance Overview
VL  - 11
IS  - 2
SP  - 189
DO  - 10.3390/cryst11020189
ER  - 

@article{
author = "Ćirić, Aleksandar and Gavrilović, Tamara and Dramićanin, Miroslav",
year = "2021",
abstract = "The figures of merit of luminescence intensity ratio (LIR) thermometry for Er3+ in 40 different crystals and glasses have been calculated and compared. For calculations, the relevant data has been collected from the literature while the missing data were derived from available absorption and emission spectra. The calculated parameters include Judd–Ofelt parameters, refractive indexes, Slater integrals, spin–orbit coupling parameters, reduced matrix elements (RMEs), energy differences between emitting levels used for LIR, absolute, and relative sensitivities. We found a slight variation of RMEs between hosts because of variations in values of Slater integrals and spin–orbit coupling parameters, and we calculated their average values over 40 hosts. The calculations showed that crystals perform better than glasses in Er3+-based thermometry, and we identified hosts that have large values of both absolute and relative sensitivity.",
journal = "Crystals",
title = "Luminescence Intensity Ratio Thermometry with Er3+: Performance Overview",
volume = "11",
number = "2",
pages = "189",
doi = "10.3390/cryst11020189"
}

Ćirić, A., Gavrilović, T.,& Dramićanin, M.. (2021). Luminescence Intensity Ratio Thermometry with Er3+: Performance Overview. in Crystals, 11(2), 189.
https://doi.org/10.3390/cryst11020189

Ćirić A, Gavrilović T, Dramićanin M. Luminescence Intensity Ratio Thermometry with Er3+: Performance Overview. in Crystals. 2021;11(2):189.
doi:10.3390/cryst11020189 .

Ćirić, Aleksandar, Gavrilović, Tamara, Dramićanin, Miroslav, "Luminescence Intensity Ratio Thermometry with Er3+: Performance Overview" in Crystals, 11, no. 2 (2021):189,
https://doi.org/10.3390/cryst11020189 . .

TY  - JOUR
AU  - Gavrilović, Tamara V.
AU  - Laganovska, Katrina
AU  - Zolotarjovs, Aleksejs
AU  - Smits, Krisjanis
AU  - Jovanović, Dragana J.
AU  - Dramićanin, Miroslav
PY  - 2018
UR  - http://linkinghub.elsevier.com/retrieve/pii/S0925346718303136
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7690
AB  - Nanoparticles (5 nm) and nanorods (2 nm × 15 nm and 4 nm × 20 nm) of monoclinic monazite LaPO4:Eu3+were prepared by reverse micelle and co-precipitation techniques. Effects of the particle size and surface defects on the intensity of luminescence and the emission spectrum shapes were analyzed by high resolution spectroscopy under laser (266 nm) and X-rays excitation. All synthesized LaPO4:Eu3+samples showed similar spectral features with characteristic Eu3+ions emission bands:5D0→7F0centered at 578.4 nm, magnetic-dipole transition5D0→7F1at 588–595 nm, electric-dipole transition5D0→7F2at 611.5–620.5 nm,5D0→7F3at (648–652 nm) and5D0→7F4at (684–702.5 nm), with the most dominant electric-dipole5D0→7F2transition. Additionally, the thermally stimulated luminescence was studied for the most dominant peak at 611.5 nm. It was shown that the Eu3+doping creates traps in all samples. Two prominent and well resolved glow peaks at 58.7 K and 172.3 K were detected for 5 nm nanoparticles, while low-intensity glow-peaks at 212.1 K and 212.2 K were observed in the X-rays irradiated nanorods. Displayed glows could be attributed to free and bound electrons and holes or to the recombination of electrons of ionized oxygen vacancies with photogenerated holes. To obtain information about the processes and specific defect type it is necessary to carry out additional analysis for all synthesized samples. The glow curves were analyzed and trap parameters were estimated and discussed throughout the paper.
T2  - Optical Materials
T1  - High resolution luminescence spectroscopy and thermoluminescence of different size LaPO4:Eu3+ nanoparticles
VL  - 82
SP  - 39
EP  - 46
DO  - 10.1016/j.optmat.2018.05.042
ER  - 

@article{
author = "Gavrilović, Tamara V. and Laganovska, Katrina and Zolotarjovs, Aleksejs and Smits, Krisjanis and Jovanović, Dragana J. and Dramićanin, Miroslav",
year = "2018",
abstract = "Nanoparticles (5 nm) and nanorods (2 nm × 15 nm and 4 nm × 20 nm) of monoclinic monazite LaPO4:Eu3+were prepared by reverse micelle and co-precipitation techniques. Effects of the particle size and surface defects on the intensity of luminescence and the emission spectrum shapes were analyzed by high resolution spectroscopy under laser (266 nm) and X-rays excitation. All synthesized LaPO4:Eu3+samples showed similar spectral features with characteristic Eu3+ions emission bands:5D0→7F0centered at 578.4 nm, magnetic-dipole transition5D0→7F1at 588–595 nm, electric-dipole transition5D0→7F2at 611.5–620.5 nm,5D0→7F3at (648–652 nm) and5D0→7F4at (684–702.5 nm), with the most dominant electric-dipole5D0→7F2transition. Additionally, the thermally stimulated luminescence was studied for the most dominant peak at 611.5 nm. It was shown that the Eu3+doping creates traps in all samples. Two prominent and well resolved glow peaks at 58.7 K and 172.3 K were detected for 5 nm nanoparticles, while low-intensity glow-peaks at 212.1 K and 212.2 K were observed in the X-rays irradiated nanorods. Displayed glows could be attributed to free and bound electrons and holes or to the recombination of electrons of ionized oxygen vacancies with photogenerated holes. To obtain information about the processes and specific defect type it is necessary to carry out additional analysis for all synthesized samples. The glow curves were analyzed and trap parameters were estimated and discussed throughout the paper.",
journal = "Optical Materials",
title = "High resolution luminescence spectroscopy and thermoluminescence of different size LaPO4:Eu3+ nanoparticles",
volume = "82",
pages = "39-46",
doi = "10.1016/j.optmat.2018.05.042"
}

Gavrilović, T. V., Laganovska, K., Zolotarjovs, A., Smits, K., Jovanović, D. J.,& Dramićanin, M.. (2018). High resolution luminescence spectroscopy and thermoluminescence of different size LaPO4:Eu3+ nanoparticles. in Optical Materials, 82, 39-46.
https://doi.org/10.1016/j.optmat.2018.05.042

Gavrilović TV, Laganovska K, Zolotarjovs A, Smits K, Jovanović DJ, Dramićanin M. High resolution luminescence spectroscopy and thermoluminescence of different size LaPO4:Eu3+ nanoparticles. in Optical Materials. 2018;82:39-46.
doi:10.1016/j.optmat.2018.05.042 .

Gavrilović, Tamara V., Laganovska, Katrina, Zolotarjovs, Aleksejs, Smits, Krisjanis, Jovanović, Dragana J., Dramićanin, Miroslav, "High resolution luminescence spectroscopy and thermoluminescence of different size LaPO4:Eu3+ nanoparticles" in Optical Materials, 82 (2018):39-46,
https://doi.org/10.1016/j.optmat.2018.05.042 . .

TY  - JOUR
AU  - Jovanović, Dragana J.
AU  - Gavrilović, Tamara V.
AU  - Dolić, Slobodan D.
AU  - Marinović-Cincović, Milena
AU  - Smits, Krisjanis
AU  - Dramićanin, Miroslav
PY  - 2018
UR  - http://linkinghub.elsevier.com/retrieve/pii/S0925346718303045
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7691
AB  - © 2018 Elsevier B.V. In recent years, there exists a tendency in research of up-conversion materials to shift excitation from 980 nm to shorter wavelengths. Here, in order to produce up-conversion luminescence emission of GdVO4-based materials under 808 nm excitation, polycrystalline powders of GdVO4:Er3+/Nd3+and GdVO4:Ho3+/Nd3+were successfully prepared by a high-temperature solid-state reaction technique. The prepared powders were highly crystalline with a single-phase zircon-type GdVO4structure and consisted of micrometer-sized irregular spherical particles (2–6 μm in diameter). In all studied samples, visible up-conversion luminescence was successfully achieved under 808 nm illumination. Near-infrared pumping produced emission bands in the green, yellow-orange and green regions of the visible spectrum. The bands in the green and red regions of GdVO4: Er3+/Nd3+as well as GdVO4:Ho3+/Nd3+were, respectively, characteristic of Er3+and Ho3+ions. The dominant band originating from the4G7/2→4I11/2transition in Nd3+ions was observed around 597 nm in all samples.
T2  - Optical Materials
T1  - Up-conversion luminescence of GdVO4:Nd3+/Er3+ and GdVO4:Nd3+/Ho3+ phosphors under 808 nm excitation
VL  - 82
SP  - 1
EP  - 6
DO  - 10.1016/j.optmat.2018.05.033
ER  - 

@article{
author = "Jovanović, Dragana J. and Gavrilović, Tamara V. and Dolić, Slobodan D. and Marinović-Cincović, Milena and Smits, Krisjanis and Dramićanin, Miroslav",
year = "2018",
abstract = "© 2018 Elsevier B.V. In recent years, there exists a tendency in research of up-conversion materials to shift excitation from 980 nm to shorter wavelengths. Here, in order to produce up-conversion luminescence emission of GdVO4-based materials under 808 nm excitation, polycrystalline powders of GdVO4:Er3+/Nd3+and GdVO4:Ho3+/Nd3+were successfully prepared by a high-temperature solid-state reaction technique. The prepared powders were highly crystalline with a single-phase zircon-type GdVO4structure and consisted of micrometer-sized irregular spherical particles (2–6 μm in diameter). In all studied samples, visible up-conversion luminescence was successfully achieved under 808 nm illumination. Near-infrared pumping produced emission bands in the green, yellow-orange and green regions of the visible spectrum. The bands in the green and red regions of GdVO4: Er3+/Nd3+as well as GdVO4:Ho3+/Nd3+were, respectively, characteristic of Er3+and Ho3+ions. The dominant band originating from the4G7/2→4I11/2transition in Nd3+ions was observed around 597 nm in all samples.",
journal = "Optical Materials",
title = "Up-conversion luminescence of GdVO4:Nd3+/Er3+ and GdVO4:Nd3+/Ho3+ phosphors under 808 nm excitation",
volume = "82",
pages = "1-6",
doi = "10.1016/j.optmat.2018.05.033"
}

Jovanović, D. J., Gavrilović, T. V., Dolić, S. D., Marinović-Cincović, M., Smits, K.,& Dramićanin, M.. (2018). Up-conversion luminescence of GdVO4:Nd3+/Er3+ and GdVO4:Nd3+/Ho3+ phosphors under 808 nm excitation. in Optical Materials, 82, 1-6.
https://doi.org/10.1016/j.optmat.2018.05.033

Jovanović DJ, Gavrilović TV, Dolić SD, Marinović-Cincović M, Smits K, Dramićanin M. Up-conversion luminescence of GdVO4:Nd3+/Er3+ and GdVO4:Nd3+/Ho3+ phosphors under 808 nm excitation. in Optical Materials. 2018;82:1-6.
doi:10.1016/j.optmat.2018.05.033 .

Jovanović, Dragana J., Gavrilović, Tamara V., Dolić, Slobodan D., Marinović-Cincović, Milena, Smits, Krisjanis, Dramićanin, Miroslav, "Up-conversion luminescence of GdVO4:Nd3+/Er3+ and GdVO4:Nd3+/Ho3+ phosphors under 808 nm excitation" in Optical Materials, 82 (2018):1-6,
https://doi.org/10.1016/j.optmat.2018.05.033 . .

TY  - JOUR
AU  - Vujčić, Ivica
AU  - Gavrilović, Tamara V.
AU  - Sekulić, Milica
AU  - Mašić, Slobodan
AU  - Putić, Slaviša S.
AU  - Papan, Jelena
AU  - Dramićanin, Miroslav
PY  - 2018
UR  - http://linkinghub.elsevier.com/retrieve/pii/S0168583X18301666
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7669
AB  - Eu3+ activated LaPO4 phosphors were prepared by a high-temperature solid-state method and irradiated to different high-doses gamma-radiation in the 0-4 MGy range. No effects of high-doses of high-energy radiation on phosphor's morphology and structure were observed, as documented by electron microscopy and X-ray diffraction measurements. On the other hand, photoluminescence measurements showed that emission properties of phosphor were affected by gamma-radiation; changes in radiative properties being prominent for absorbed radiation doses up to 250 kGy after which no additional changes are observed. Judd-Ofelt analysis of emission spectra is performed to thoroughly investigate radiative properties of phosphors. Analysis showed that radiative transition probability of Eu3+ emission decreases while non-radiative probability increases upon gamma-irradiation. Quantum efficiency of emission is decreased from about 46% to 35% when Eu3+ doped LaPO4 powders are exposed to gamma-radiation of 250 kGy dose, showing no additional decrease for higher gamma-radiation doses.
T2  - Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms
T1  - Gamma-radiation effects on luminescence properties of Eu 3+ activated LaPO 4 phosphor
VL  - 422
SP  - 85
EP  - 90
DO  - 10.1016/j.nimb.2018.03.002
ER  - 

@article{
author = "Vujčić, Ivica and Gavrilović, Tamara V. and Sekulić, Milica and Mašić, Slobodan and Putić, Slaviša S. and Papan, Jelena and Dramićanin, Miroslav",
year = "2018",
abstract = "Eu3+ activated LaPO4 phosphors were prepared by a high-temperature solid-state method and irradiated to different high-doses gamma-radiation in the 0-4 MGy range. No effects of high-doses of high-energy radiation on phosphor's morphology and structure were observed, as documented by electron microscopy and X-ray diffraction measurements. On the other hand, photoluminescence measurements showed that emission properties of phosphor were affected by gamma-radiation; changes in radiative properties being prominent for absorbed radiation doses up to 250 kGy after which no additional changes are observed. Judd-Ofelt analysis of emission spectra is performed to thoroughly investigate radiative properties of phosphors. Analysis showed that radiative transition probability of Eu3+ emission decreases while non-radiative probability increases upon gamma-irradiation. Quantum efficiency of emission is decreased from about 46% to 35% when Eu3+ doped LaPO4 powders are exposed to gamma-radiation of 250 kGy dose, showing no additional decrease for higher gamma-radiation doses.",
journal = "Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms",
title = "Gamma-radiation effects on luminescence properties of Eu 3+ activated LaPO 4 phosphor",
volume = "422",
pages = "85-90",
doi = "10.1016/j.nimb.2018.03.002"
}

Vujčić, I., Gavrilović, T. V., Sekulić, M., Mašić, S., Putić, S. S., Papan, J.,& Dramićanin, M.. (2018). Gamma-radiation effects on luminescence properties of Eu 3+ activated LaPO 4 phosphor. in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 422, 85-90.
https://doi.org/10.1016/j.nimb.2018.03.002

Vujčić I, Gavrilović TV, Sekulić M, Mašić S, Putić SS, Papan J, Dramićanin M. Gamma-radiation effects on luminescence properties of Eu 3+ activated LaPO 4 phosphor. in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms. 2018;422:85-90.
doi:10.1016/j.nimb.2018.03.002 .

Vujčić, Ivica, Gavrilović, Tamara V., Sekulić, Milica, Mašić, Slobodan, Putić, Slaviša S., Papan, Jelena, Dramićanin, Miroslav, "Gamma-radiation effects on luminescence properties of Eu 3+ activated LaPO 4 phosphor" in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 422 (2018):85-90,
https://doi.org/10.1016/j.nimb.2018.03.002 . .

TY  - JOUR
AU  - Vujčić, Ivica
AU  - Gavrilović, Tamara V.
AU  - Sekulić, Milica
AU  - Mašić, Slobodan
AU  - Milićević, Bojana R.
AU  - Dramićanin, Miroslav
AU  - Đorđević, Vesna R.
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7964
AB  - YPO4 phosphors doped with trivalent ion Pr3+ were prepared by sol–gel method and treated with different doses of gamma radiation, from 0.25 MGy to 4 MGy. Effects of radiation on morphology, structure and luminescent properties were analyzed. Also, the influence of radiation on the change in the color of the samples was examined. The color efficiency of powders was evaluated by colorimetric analysis (CIE and L * a * b system). It has been observed that powders change color under the influence of radiation, i.e. they pass from white to pinkish red. Also, it has been determined that the radiation affects morphology change, as the particle size increases with increasing of the radiation dose. With the increase in the radiation dose, the emission intensity of samples decreases. The structure remains almost unchanged after irradiation, and the intensity constantly decreases with increasing of dose. © 2018, © 2018 Informa UK Limited, trading as Taylor & Francis Group.
T2  - Radiation Effects and Defects in Solids
T1  - Radiation effects on luminescent and structural properties of YPO4: Pr3+ nanophosphors
VL  - 173
IS  - 11-12
SP  - 1054
EP  - 1067
DO  - 10.1080/10420150.2018.1539722
ER  - 

@article{
author = "Vujčić, Ivica and Gavrilović, Tamara V. and Sekulić, Milica and Mašić, Slobodan and Milićević, Bojana R. and Dramićanin, Miroslav and Đorđević, Vesna R.",
year = "2018",
abstract = "YPO4 phosphors doped with trivalent ion Pr3+ were prepared by sol–gel method and treated with different doses of gamma radiation, from 0.25 MGy to 4 MGy. Effects of radiation on morphology, structure and luminescent properties were analyzed. Also, the influence of radiation on the change in the color of the samples was examined. The color efficiency of powders was evaluated by colorimetric analysis (CIE and L * a * b system). It has been observed that powders change color under the influence of radiation, i.e. they pass from white to pinkish red. Also, it has been determined that the radiation affects morphology change, as the particle size increases with increasing of the radiation dose. With the increase in the radiation dose, the emission intensity of samples decreases. The structure remains almost unchanged after irradiation, and the intensity constantly decreases with increasing of dose. © 2018, © 2018 Informa UK Limited, trading as Taylor & Francis Group.",
journal = "Radiation Effects and Defects in Solids",
title = "Radiation effects on luminescent and structural properties of YPO4: Pr3+ nanophosphors",
volume = "173",
number = "11-12",
pages = "1054-1067",
doi = "10.1080/10420150.2018.1539722"
}

Vujčić, I., Gavrilović, T. V., Sekulić, M., Mašić, S., Milićević, B. R., Dramićanin, M.,& Đorđević, V. R.. (2018). Radiation effects on luminescent and structural properties of YPO4: Pr3+ nanophosphors. in Radiation Effects and Defects in Solids, 173(11-12), 1054-1067.
https://doi.org/10.1080/10420150.2018.1539722

Vujčić I, Gavrilović TV, Sekulić M, Mašić S, Milićević BR, Dramićanin M, Đorđević VR. Radiation effects on luminescent and structural properties of YPO4: Pr3+ nanophosphors. in Radiation Effects and Defects in Solids. 2018;173(11-12):1054-1067.
doi:10.1080/10420150.2018.1539722 .

Vujčić, Ivica, Gavrilović, Tamara V., Sekulić, Milica, Mašić, Slobodan, Milićević, Bojana R., Dramićanin, Miroslav, Đorđević, Vesna R., "Radiation effects on luminescent and structural properties of YPO4: Pr3+ nanophosphors" in Radiation Effects and Defects in Solids, 173, no. 11-12 (2018):1054-1067,
https://doi.org/10.1080/10420150.2018.1539722 . .

TY  - JOUR
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7585
AB  - In this work, we focused on the syntheses, structure and spectroscopic properties of GdVO4:Dy3+ and DyVO4 (nano)particles of different sizes and shapes (spherical nanoparticles of 2 nm, 4 nm, and 20 nm in size, nanorods with a few nanometers in diameter and up to 10-20 nm in length and microparticles of 1 -8 mu m) obtained by four synthetic methods. The size effect on the structure, Raman active modes, and photoluminescence emission intensities was analyzed by X-ray diffraction, Raman and photo-luminescence spectroscopy, scanning and transmission electron microscopy, and diffuse reflection spectroscopy. All X-ray diffraction patterns clearly indicated presence of a single tetragonal zircon-type phase; absence of impurity phases indicate that the dopant Dy3+ ions were successfully and uniformly incorporated into the GdVO4 host lattice due to the equal valence and similar ionic radii. Micro-Raman measurements support the XRD measurements and showed Raman-active modes of the REVO4 systems (RE = Gd, Dy). The difference between the two hosts in the diffuse reflectance spectra was observed and it could be attributed to more effective Gd3+ ions on the charge transfer bands and different polarization (compared to bulk material) in smaller nanoparticles. Photoluminescence spectroscopy showed several bands in the visible and near-infrared regions which can be exclusively attributed to the f-f transitions of Dy3+ ions. (C) 2017 Elsevier B.V. All rights reserved.
T2  - Optical Materials
T1  - Synthesis, structure and spectroscopic properties of luminescent GdVO4:Dy3+ and DyVO4 particles
VL  - 76
SP  - 308
EP  - 316
DO  - 10.1016/j.optmat.2017.12.046
ER  - 

@article{
year = "2018",
abstract = "In this work, we focused on the syntheses, structure and spectroscopic properties of GdVO4:Dy3+ and DyVO4 (nano)particles of different sizes and shapes (spherical nanoparticles of 2 nm, 4 nm, and 20 nm in size, nanorods with a few nanometers in diameter and up to 10-20 nm in length and microparticles of 1 -8 mu m) obtained by four synthetic methods. The size effect on the structure, Raman active modes, and photoluminescence emission intensities was analyzed by X-ray diffraction, Raman and photo-luminescence spectroscopy, scanning and transmission electron microscopy, and diffuse reflection spectroscopy. All X-ray diffraction patterns clearly indicated presence of a single tetragonal zircon-type phase; absence of impurity phases indicate that the dopant Dy3+ ions were successfully and uniformly incorporated into the GdVO4 host lattice due to the equal valence and similar ionic radii. Micro-Raman measurements support the XRD measurements and showed Raman-active modes of the REVO4 systems (RE = Gd, Dy). The difference between the two hosts in the diffuse reflectance spectra was observed and it could be attributed to more effective Gd3+ ions on the charge transfer bands and different polarization (compared to bulk material) in smaller nanoparticles. Photoluminescence spectroscopy showed several bands in the visible and near-infrared regions which can be exclusively attributed to the f-f transitions of Dy3+ ions. (C) 2017 Elsevier B.V. All rights reserved.",
journal = "Optical Materials",
title = "Synthesis, structure and spectroscopic properties of luminescent GdVO4:Dy3+ and DyVO4 particles",
volume = "76",
pages = "308-316",
doi = "10.1016/j.optmat.2017.12.046"
}

(2018). Synthesis, structure and spectroscopic properties of luminescent GdVO4:Dy3+ and DyVO4 particles. in Optical Materials, 76, 308-316.
https://doi.org/10.1016/j.optmat.2017.12.046

Synthesis, structure and spectroscopic properties of luminescent GdVO4:Dy3+ and DyVO4 particles. in Optical Materials. 2018;76:308-316.
doi:10.1016/j.optmat.2017.12.046 .

"Synthesis, structure and spectroscopic properties of luminescent GdVO4:Dy3+ and DyVO4 particles" in Optical Materials, 76 (2018):308-316,
https://doi.org/10.1016/j.optmat.2017.12.046 . .

TY  - JOUR
AU  - Gavrilović, Tamara V.
AU  - Periša, Jovana
AU  - Papan, Jelena
AU  - Vuković, Katarina
AU  - Smits, Krisjanis
AU  - Jovanović, Dragana J.
AU  - Dramićanin, Miroslav
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1881
AB  - This paper provides the detailed study of (nano) particles size effect on structural and luminescent properties of LaPO4: Eu3+ synthesized by four different methods: high temperature solid-state, co-precipitation, reverse micelle and colloidal. These methods delivered monoclinic monazite-phase submicron particles ( GT 100 nm), 4 x 20 nm nanorods and 5 nm spheres (depending on the annealing temperature), 2 x 15 nm nanorods, and ultrasmall spheres (2 nm), respectively. The analysis of emission intensity dependence on Eu3+ concentration showed that quenching concentration increases with a decrease of the particle size. The critical distance for energy transfer between Eu3+ ions is found to be 18.2 angstrom, and the dipole-dipole interaction is the dominant mechanism responsible for the concentration quenching of emission. With the increase in Eu3+ concentration, the unit-cell parameter slightly increases to accommodate larger Eu3+ ions at sites of smaller La3+ ions. Photoluminescent emission spectra presented four characteristic bands in the red spectral region: at 592 nm (D-5(0) - GT F-7(1)), at 612 nm (D-5(0) - GT F-7(2)), at 652 nm (D-5(0) - GT F-7(3)) and at 684 nm (D-5(0) - GT F-7(4)), while in small colloidal nanoparticles additional emission bands from host defects appear at shorter wavelengths. Intensities of f-f electronic transitions change with particles size due to small changes in symmetry around europium sites, while emission bandwidths increase with the reduction of particle size due to increased structural disorder. Judd-Ofelt analysis showed that internal quantum yield of Eu3+ emission is strongly influenced by particles morphology.
T2  - Journal of Luminescence
T1  - Particle size effects on the structure and emission of Eu3+: LaPO4 and EuPO4 phosphors
VL  - 195
SP  - 420
EP  - 429
DO  - 10.1016/j.jlumin.2017.12.002
ER  - 

@article{
author = "Gavrilović, Tamara V. and Periša, Jovana and Papan, Jelena and Vuković, Katarina and Smits, Krisjanis and Jovanović, Dragana J. and Dramićanin, Miroslav",
year = "2018",
abstract = "This paper provides the detailed study of (nano) particles size effect on structural and luminescent properties of LaPO4: Eu3+ synthesized by four different methods: high temperature solid-state, co-precipitation, reverse micelle and colloidal. These methods delivered monoclinic monazite-phase submicron particles ( GT 100 nm), 4 x 20 nm nanorods and 5 nm spheres (depending on the annealing temperature), 2 x 15 nm nanorods, and ultrasmall spheres (2 nm), respectively. The analysis of emission intensity dependence on Eu3+ concentration showed that quenching concentration increases with a decrease of the particle size. The critical distance for energy transfer between Eu3+ ions is found to be 18.2 angstrom, and the dipole-dipole interaction is the dominant mechanism responsible for the concentration quenching of emission. With the increase in Eu3+ concentration, the unit-cell parameter slightly increases to accommodate larger Eu3+ ions at sites of smaller La3+ ions. Photoluminescent emission spectra presented four characteristic bands in the red spectral region: at 592 nm (D-5(0) - GT F-7(1)), at 612 nm (D-5(0) - GT F-7(2)), at 652 nm (D-5(0) - GT F-7(3)) and at 684 nm (D-5(0) - GT F-7(4)), while in small colloidal nanoparticles additional emission bands from host defects appear at shorter wavelengths. Intensities of f-f electronic transitions change with particles size due to small changes in symmetry around europium sites, while emission bandwidths increase with the reduction of particle size due to increased structural disorder. Judd-Ofelt analysis showed that internal quantum yield of Eu3+ emission is strongly influenced by particles morphology.",
journal = "Journal of Luminescence",
title = "Particle size effects on the structure and emission of Eu3+: LaPO4 and EuPO4 phosphors",
volume = "195",
pages = "420-429",
doi = "10.1016/j.jlumin.2017.12.002"
}

Gavrilović, T. V., Periša, J., Papan, J., Vuković, K., Smits, K., Jovanović, D. J.,& Dramićanin, M.. (2018). Particle size effects on the structure and emission of Eu3+: LaPO4 and EuPO4 phosphors. in Journal of Luminescence, 195, 420-429.
https://doi.org/10.1016/j.jlumin.2017.12.002

Gavrilović TV, Periša J, Papan J, Vuković K, Smits K, Jovanović DJ, Dramićanin M. Particle size effects on the structure and emission of Eu3+: LaPO4 and EuPO4 phosphors. in Journal of Luminescence. 2018;195:420-429.
doi:10.1016/j.jlumin.2017.12.002 .

Gavrilović, Tamara V., Periša, Jovana, Papan, Jelena, Vuković, Katarina, Smits, Krisjanis, Jovanović, Dragana J., Dramićanin, Miroslav, "Particle size effects on the structure and emission of Eu3+: LaPO4 and EuPO4 phosphors" in Journal of Luminescence, 195 (2018):420-429,
https://doi.org/10.1016/j.jlumin.2017.12.002 . .

TY  - JOUR
AU  - Gavrilović, Tamara V.
AU  - Jovanović, Dragana J.
AU  - Smits, Krisjanis
AU  - Dramićanin, Miroslav
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/937
AB  - Lanthanide-doped GdVO4 nanorods that exhibit upconversion emission under 982 nm excitation have been prepared by a facile room-temperature chemical co-precipitation method followed by a subsequent annealing at temperatures of 600 degrees C, 800 degrees C and 1000 degrees C. Multicolor upconversion emission, including white, was achieved by tuning the concentrations of dopant lanthanide ions (Ho3+, Er3+, Tm3+ and Yb3+) in GdVO4. It is found that four GdVO4 samples emit light with the white chromaticity coordinates of (0.326, 0.339), (0.346, 0.343), (0.323, 0327) and (0.342, 0.340) respectively, under a single-wavelength NIR excitation. These coordinates are very close to the standard equal energy white light coordinates (0333, 0.333) according to the 1931 CIE diagram. By varying dopant lanthanide concentrations in nanorods it is possible to produce upconversion emission with colors between red (0.504, 0369), green (0.282, 0.577) and blue (0.142, 0.125) coordinates. (C) 2015 Elsevier Ltd. All rights reserved.
PB  - Elsevier
T2  - Dyes and Pigments
T1  - Multicolor upconversion luminescence of GdVO4:Ln(3+)/Yb3+ (Ln(3+) = Ho3+, Er3+, Tm3+, Ho3+/Er3+/Tm3+) nanorods
VL  - 126
SP  - 1
EP  - 7
DO  - 10.1016/j.dyepig.2015.11.005
ER  - 

@article{
author = "Gavrilović, Tamara V. and Jovanović, Dragana J. and Smits, Krisjanis and Dramićanin, Miroslav",
year = "2016",
abstract = "Lanthanide-doped GdVO4 nanorods that exhibit upconversion emission under 982 nm excitation have been prepared by a facile room-temperature chemical co-precipitation method followed by a subsequent annealing at temperatures of 600 degrees C, 800 degrees C and 1000 degrees C. Multicolor upconversion emission, including white, was achieved by tuning the concentrations of dopant lanthanide ions (Ho3+, Er3+, Tm3+ and Yb3+) in GdVO4. It is found that four GdVO4 samples emit light with the white chromaticity coordinates of (0.326, 0.339), (0.346, 0.343), (0.323, 0327) and (0.342, 0.340) respectively, under a single-wavelength NIR excitation. These coordinates are very close to the standard equal energy white light coordinates (0333, 0.333) according to the 1931 CIE diagram. By varying dopant lanthanide concentrations in nanorods it is possible to produce upconversion emission with colors between red (0.504, 0369), green (0.282, 0.577) and blue (0.142, 0.125) coordinates. (C) 2015 Elsevier Ltd. All rights reserved.",
publisher = "Elsevier",
journal = "Dyes and Pigments",
title = "Multicolor upconversion luminescence of GdVO4:Ln(3+)/Yb3+ (Ln(3+) = Ho3+, Er3+, Tm3+, Ho3+/Er3+/Tm3+) nanorods",
volume = "126",
pages = "1-7",
doi = "10.1016/j.dyepig.2015.11.005"
}

Gavrilović, T. V., Jovanović, D. J., Smits, K.,& Dramićanin, M.. (2016). Multicolor upconversion luminescence of GdVO4:Ln(3+)/Yb3+ (Ln(3+) = Ho3+, Er3+, Tm3+, Ho3+/Er3+/Tm3+) nanorods. in Dyes and Pigments
Elsevier., 126, 1-7.
https://doi.org/10.1016/j.dyepig.2015.11.005

Gavrilović TV, Jovanović DJ, Smits K, Dramićanin M. Multicolor upconversion luminescence of GdVO4:Ln(3+)/Yb3+ (Ln(3+) = Ho3+, Er3+, Tm3+, Ho3+/Er3+/Tm3+) nanorods. in Dyes and Pigments. 2016;126:1-7.
doi:10.1016/j.dyepig.2015.11.005 .

Gavrilović, Tamara V., Jovanović, Dragana J., Smits, Krisjanis, Dramićanin, Miroslav, "Multicolor upconversion luminescence of GdVO4:Ln(3+)/Yb3+ (Ln(3+) = Ho3+, Er3+, Tm3+, Ho3+/Er3+/Tm3+) nanorods" in Dyes and Pigments, 126 (2016):1-7,
https://doi.org/10.1016/j.dyepig.2015.11.005 . .

TY  - JOUR
AU  - Gavrilović, Tamara V.
AU  - Jovanović, Dragana J.
AU  - Lojpur, Vesna
AU  - Nikolić, Aleksandar S.
AU  - Dramićanin, Miroslav
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/729
AB  - In this paper, we studied the effects of Er3+/Yb3+ concentration ratio on structural, morphological and luminescence properties of GdVO4:Er3+/Yb3+ green phosphors prepared by a high-temperature solid state method. The samples with different concentrations (between 0.5 to 2 mol%) of dopant Er3+ emitting ions and different concentrations (between 5 to 20 mol%) of sensitizer ions (Yb3+) were studied. The phosphors were characterized by the X-ray diffraction (XRD), scanning electron microscopy (SEM) and photoluminescence spectroscopy. For all samples, XRD diffraction patterns confirmed a formation of a pure GdVO4 phase, while the SEM showed that the materials are comprised of chunks of deformed particles with an average diameter ranging from approximately 2 mu m to 8 mu m. Both, down-conversion and up-conversion emission spectra of GdVO4: Er3+/Yb3+ samples, under near UV and IR excitations, exhibit two strong emission bands in the green spectral region at 525 nm and 552 nm wavelengths corresponding to H-2(11/2) - GT I-4(15/2) and S-4(3/2) - GT I-4(15/2) electronic transitions of Er3+ ions. The intensity of the green emission was changed by changing the Er3+/Yb3+ concentration ratio. This dual-mode luminescence makes these materials ideal as green phosphors for a wide variety of applications in the fields of bioanalysis and biomedical.
T2  - Science of Sintering
T1  - Influence of Er3+/Yb3+ Concentration Ratio on the Down-conversion and Up-conversion Luminescence and Lifetime in GdVO4:Er3+/Yb3+ Microcrystals
VL  - 47
IS  - 2
SP  - 221
EP  - 228
DO  - 10.2298/SOS1502221G
ER  - 

@article{
author = "Gavrilović, Tamara V. and Jovanović, Dragana J. and Lojpur, Vesna and Nikolić, Aleksandar S. and Dramićanin, Miroslav",
year = "2015",
abstract = "In this paper, we studied the effects of Er3+/Yb3+ concentration ratio on structural, morphological and luminescence properties of GdVO4:Er3+/Yb3+ green phosphors prepared by a high-temperature solid state method. The samples with different concentrations (between 0.5 to 2 mol%) of dopant Er3+ emitting ions and different concentrations (between 5 to 20 mol%) of sensitizer ions (Yb3+) were studied. The phosphors were characterized by the X-ray diffraction (XRD), scanning electron microscopy (SEM) and photoluminescence spectroscopy. For all samples, XRD diffraction patterns confirmed a formation of a pure GdVO4 phase, while the SEM showed that the materials are comprised of chunks of deformed particles with an average diameter ranging from approximately 2 mu m to 8 mu m. Both, down-conversion and up-conversion emission spectra of GdVO4: Er3+/Yb3+ samples, under near UV and IR excitations, exhibit two strong emission bands in the green spectral region at 525 nm and 552 nm wavelengths corresponding to H-2(11/2) - GT I-4(15/2) and S-4(3/2) - GT I-4(15/2) electronic transitions of Er3+ ions. The intensity of the green emission was changed by changing the Er3+/Yb3+ concentration ratio. This dual-mode luminescence makes these materials ideal as green phosphors for a wide variety of applications in the fields of bioanalysis and biomedical.",
journal = "Science of Sintering",
title = "Influence of Er3+/Yb3+ Concentration Ratio on the Down-conversion and Up-conversion Luminescence and Lifetime in GdVO4:Er3+/Yb3+ Microcrystals",
volume = "47",
number = "2",
pages = "221-228",
doi = "10.2298/SOS1502221G"
}

Gavrilović, T. V., Jovanović, D. J., Lojpur, V., Nikolić, A. S.,& Dramićanin, M.. (2015). Influence of Er3+/Yb3+ Concentration Ratio on the Down-conversion and Up-conversion Luminescence and Lifetime in GdVO4:Er3+/Yb3+ Microcrystals. in Science of Sintering, 47(2), 221-228.
https://doi.org/10.2298/SOS1502221G

Gavrilović TV, Jovanović DJ, Lojpur V, Nikolić AS, Dramićanin M. Influence of Er3+/Yb3+ Concentration Ratio on the Down-conversion and Up-conversion Luminescence and Lifetime in GdVO4:Er3+/Yb3+ Microcrystals. in Science of Sintering. 2015;47(2):221-228.
doi:10.2298/SOS1502221G .

Gavrilović, Tamara V., Jovanović, Dragana J., Lojpur, Vesna, Nikolić, Aleksandar S., Dramićanin, Miroslav, "Influence of Er3+/Yb3+ Concentration Ratio on the Down-conversion and Up-conversion Luminescence and Lifetime in GdVO4:Er3+/Yb3+ Microcrystals" in Science of Sintering, 47, no. 2 (2015):221-228,
https://doi.org/10.2298/SOS1502221G . .

TY  - JOUR
AU  - Gavrilović, Tamara V.
AU  - Jovanović, Dragana J.
AU  - Trandafilović, Lidija V.
AU  - Dramićanin, Miroslav
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/521
AB  - We present the structural and luminescent properties of Ho3+/Yb5+-doped GdVO4 and Li+-co-doped GdVO4:Ho3+/Yb3+ powder phosphors. The materials were prepared by high-temperature solid state method with different concentrations (between 0.5 and 2 mol%) of dopant Ho3+ emitting ions and different concentrations (between 5 and 20 mol%) of sensitizer Yb3+ ions. The dopant ions provided the material with intense luminescence emission; green emissions (centered at 542 nm from F-5(4),S-5(2) - GT I-5(8) electronic transition of Ho3+ ions) resulted upon ultraviolet excitation, and red (centered at 659 nm from F-5(5) - GT I-5(8) electronic transition of Ho3+ ions) upon near-infrared excitation. The co-doped materials were obtained under identical experimental conditions by adding Li+ ions (5, 7.5, 10, and 15 mol%). The powders co-doped with 7.5 mol% Li+ ions showed a downconversion emission intensity more than twice as high as the samples without if co-doping. In upconversion, an equal intensification of emission was achieved with co-doping with 10 mol% Li+. The influences of Ho3+/Yb3+ concentration ratio and Li+ co-doping level on emission color and emission branching was investigated and analyzed for both downconversion and upconversion emission. Increasing Yb3+ concentration was found to increase the share of dominant emission (green) in downconversion, but decreased the share of dominant emission (red) in upconversion. (C) 2015 Elsevier B.V. All rights reserved.
T2  - Optical Materials
T1  - Effects of Ho3+ and Yb3+ doping concentrations and Li+ co-doping on the luminescence of GdVO4 powders
VL  - 45
SP  - 76
EP  - 81
DO  - 10.1016/j.optmat.2015.03.013
ER  - 

@article{
author = "Gavrilović, Tamara V. and Jovanović, Dragana J. and Trandafilović, Lidija V. and Dramićanin, Miroslav",
year = "2015",
abstract = "We present the structural and luminescent properties of Ho3+/Yb5+-doped GdVO4 and Li+-co-doped GdVO4:Ho3+/Yb3+ powder phosphors. The materials were prepared by high-temperature solid state method with different concentrations (between 0.5 and 2 mol%) of dopant Ho3+ emitting ions and different concentrations (between 5 and 20 mol%) of sensitizer Yb3+ ions. The dopant ions provided the material with intense luminescence emission; green emissions (centered at 542 nm from F-5(4),S-5(2) - GT I-5(8) electronic transition of Ho3+ ions) resulted upon ultraviolet excitation, and red (centered at 659 nm from F-5(5) - GT I-5(8) electronic transition of Ho3+ ions) upon near-infrared excitation. The co-doped materials were obtained under identical experimental conditions by adding Li+ ions (5, 7.5, 10, and 15 mol%). The powders co-doped with 7.5 mol% Li+ ions showed a downconversion emission intensity more than twice as high as the samples without if co-doping. In upconversion, an equal intensification of emission was achieved with co-doping with 10 mol% Li+. The influences of Ho3+/Yb3+ concentration ratio and Li+ co-doping level on emission color and emission branching was investigated and analyzed for both downconversion and upconversion emission. Increasing Yb3+ concentration was found to increase the share of dominant emission (green) in downconversion, but decreased the share of dominant emission (red) in upconversion. (C) 2015 Elsevier B.V. All rights reserved.",
journal = "Optical Materials",
title = "Effects of Ho3+ and Yb3+ doping concentrations and Li+ co-doping on the luminescence of GdVO4 powders",
volume = "45",
pages = "76-81",
doi = "10.1016/j.optmat.2015.03.013"
}

Gavrilović, T. V., Jovanović, D. J., Trandafilović, L. V.,& Dramićanin, M.. (2015). Effects of Ho3+ and Yb3+ doping concentrations and Li+ co-doping on the luminescence of GdVO4 powders. in Optical Materials, 45, 76-81.
https://doi.org/10.1016/j.optmat.2015.03.013

Gavrilović TV, Jovanović DJ, Trandafilović LV, Dramićanin M. Effects of Ho3+ and Yb3+ doping concentrations and Li+ co-doping on the luminescence of GdVO4 powders. in Optical Materials. 2015;45:76-81.
doi:10.1016/j.optmat.2015.03.013 .

Gavrilović, Tamara V., Jovanović, Dragana J., Trandafilović, Lidija V., Dramićanin, Miroslav, "Effects of Ho3+ and Yb3+ doping concentrations and Li+ co-doping on the luminescence of GdVO4 powders" in Optical Materials, 45 (2015):76-81,
https://doi.org/10.1016/j.optmat.2015.03.013 . .

TY  - JOUR
AU  - Gavrilović, Tamara V.
AU  - Jovanović, Dragana J.
AU  - Lojpur, Vesna
AU  - Đorđević, Vesna R.
AU  - Dramićanin, Miroslav
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6074
AB  - This paper demonstrates the effects of Li+ co-doping on the structure, morphology, and luminescence properties of GdVO4:Er3+/Yb3+ phosphor prepared using a high-temperature solid-state chemistry method. The GdVO4:Er3+/Yb3+ powders synthesized with the Li+ co-dopant (in concentrations of 0, 5, 10, and 15 mol%) are characterized by X-ray powder diffraction, scanning electron microscopy, and photoluminescence spectroscopy. Structural analysis showed that powders co-doped with Li+ have larger crystallite sizes and slightly smaller crystal lattice parameters than powders prepared without Li+ ions. Photoluminescence down-conversion (345-nm excitation) and up-conversion (980-nm excitation) spectra show characteristic Er3+ emissions, with the most intense bands peaking at 525 nm (H-2(11/2) - GT I-4(15/2) transition) and 552 nm (S-4(3/2) - GT I-4(15/2)). The intensity of up-conversion emission from GdVO4:Er3+/Yb3+ is enhanced (by a factor of four) by co-doping with 5 mol% of Li+ ions. The mechanisms responsible for this emission enhancement are discussed. (C) 2014 Elsevier Inc. All rights reserved.
T2  - Journal of Solid State Chemistry
T1  - Enhancement of luminescence emission from GdVO4:Er3+/Yb3+ phosphor by Li+ co-doping
VL  - 217
SP  - 92
EP  - 98
DO  - 10.1016/j.jssc.2014.05.009
ER  - 

@article{
author = "Gavrilović, Tamara V. and Jovanović, Dragana J. and Lojpur, Vesna and Đorđević, Vesna R. and Dramićanin, Miroslav",
year = "2014",
abstract = "This paper demonstrates the effects of Li+ co-doping on the structure, morphology, and luminescence properties of GdVO4:Er3+/Yb3+ phosphor prepared using a high-temperature solid-state chemistry method. The GdVO4:Er3+/Yb3+ powders synthesized with the Li+ co-dopant (in concentrations of 0, 5, 10, and 15 mol%) are characterized by X-ray powder diffraction, scanning electron microscopy, and photoluminescence spectroscopy. Structural analysis showed that powders co-doped with Li+ have larger crystallite sizes and slightly smaller crystal lattice parameters than powders prepared without Li+ ions. Photoluminescence down-conversion (345-nm excitation) and up-conversion (980-nm excitation) spectra show characteristic Er3+ emissions, with the most intense bands peaking at 525 nm (H-2(11/2) - GT I-4(15/2) transition) and 552 nm (S-4(3/2) - GT I-4(15/2)). The intensity of up-conversion emission from GdVO4:Er3+/Yb3+ is enhanced (by a factor of four) by co-doping with 5 mol% of Li+ ions. The mechanisms responsible for this emission enhancement are discussed. (C) 2014 Elsevier Inc. All rights reserved.",
journal = "Journal of Solid State Chemistry",
title = "Enhancement of luminescence emission from GdVO4:Er3+/Yb3+ phosphor by Li+ co-doping",
volume = "217",
pages = "92-98",
doi = "10.1016/j.jssc.2014.05.009"
}

Gavrilović, T. V., Jovanović, D. J., Lojpur, V., Đorđević, V. R.,& Dramićanin, M.. (2014). Enhancement of luminescence emission from GdVO4:Er3+/Yb3+ phosphor by Li+ co-doping. in Journal of Solid State Chemistry, 217, 92-98.
https://doi.org/10.1016/j.jssc.2014.05.009

Gavrilović TV, Jovanović DJ, Lojpur V, Đorđević VR, Dramićanin M. Enhancement of luminescence emission from GdVO4:Er3+/Yb3+ phosphor by Li+ co-doping. in Journal of Solid State Chemistry. 2014;217:92-98.
doi:10.1016/j.jssc.2014.05.009 .

Gavrilović, Tamara V., Jovanović, Dragana J., Lojpur, Vesna, Đorđević, Vesna R., Dramićanin, Miroslav, "Enhancement of luminescence emission from GdVO4:Er3+/Yb3+ phosphor by Li+ co-doping" in Journal of Solid State Chemistry, 217 (2014):92-98,
https://doi.org/10.1016/j.jssc.2014.05.009 . .

TY  - JOUR
AU  - Gavrilović, Tamara V.
AU  - Jovanović, Dragana J.
AU  - Lojpur, Vesna
AU  - Dramićanin, Miroslav
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5898
AB  - Synthesis of Eu3+- and Er3+/Yb3+-doped GdVO4 nanoparticles in reverse micelles and their multifunctional luminescence properties are presented. Using cyclohexane, Triton X-100, and n-pentanol as the oil, surfactant, and co-surfactant, respectively, crystalline nanoparticles with similar to 4 nm diameter are prepared at low temperatures. The particle size assessed using transmission electron microscopy is similar to the crystallite size obtained from X-ray diffraction measurements, suggesting that each particle comprises a single crystallite. Eu3+-doped GdVO4 nanoparticles emit red light through downconversion upon UV excitation. Er3+/Yb3+-doped GdVO4 nanoparticles exhibit several functions; apart from the downconversion of UV radiation into visible green light, they act as upconvertors, transforming near-infrared excitation (980 nm) into visible green light. The ratio of green emissions from H-2(11/2)- GT I-2(15/2) and S-4(3/2)- GT I-4(15/2) transitions is temperature dependent and can be used for nanoscale temperature sensing with near-infrared excitation. The relative sensor sensitivity is 1.11%K-1, which is among the highest sensitivities recorded for upconversion-luminescence-based thermometers.
T2  - Scientific Reports
T1  - Multifunctional Eu3+- and Er3+/Yb3+-doped GdVO4 nanoparticles synthesized by reverse micelle method
VL  - 4
DO  - 10.1038/srep04209
ER  - 

@article{
author = "Gavrilović, Tamara V. and Jovanović, Dragana J. and Lojpur, Vesna and Dramićanin, Miroslav",
year = "2014",
abstract = "Synthesis of Eu3+- and Er3+/Yb3+-doped GdVO4 nanoparticles in reverse micelles and their multifunctional luminescence properties are presented. Using cyclohexane, Triton X-100, and n-pentanol as the oil, surfactant, and co-surfactant, respectively, crystalline nanoparticles with similar to 4 nm diameter are prepared at low temperatures. The particle size assessed using transmission electron microscopy is similar to the crystallite size obtained from X-ray diffraction measurements, suggesting that each particle comprises a single crystallite. Eu3+-doped GdVO4 nanoparticles emit red light through downconversion upon UV excitation. Er3+/Yb3+-doped GdVO4 nanoparticles exhibit several functions; apart from the downconversion of UV radiation into visible green light, they act as upconvertors, transforming near-infrared excitation (980 nm) into visible green light. The ratio of green emissions from H-2(11/2)- GT I-2(15/2) and S-4(3/2)- GT I-4(15/2) transitions is temperature dependent and can be used for nanoscale temperature sensing with near-infrared excitation. The relative sensor sensitivity is 1.11%K-1, which is among the highest sensitivities recorded for upconversion-luminescence-based thermometers.",
journal = "Scientific Reports",
title = "Multifunctional Eu3+- and Er3+/Yb3+-doped GdVO4 nanoparticles synthesized by reverse micelle method",
volume = "4",
doi = "10.1038/srep04209"
}

Gavrilović, T. V., Jovanović, D. J., Lojpur, V.,& Dramićanin, M.. (2014). Multifunctional Eu3+- and Er3+/Yb3+-doped GdVO4 nanoparticles synthesized by reverse micelle method. in Scientific Reports, 4.
https://doi.org/10.1038/srep04209

Gavrilović TV, Jovanović DJ, Lojpur V, Dramićanin M. Multifunctional Eu3+- and Er3+/Yb3+-doped GdVO4 nanoparticles synthesized by reverse micelle method. in Scientific Reports. 2014;4.
doi:10.1038/srep04209 .

Gavrilović, Tamara V., Jovanović, Dragana J., Lojpur, Vesna, Dramićanin, Miroslav, "Multifunctional Eu3+- and Er3+/Yb3+-doped GdVO4 nanoparticles synthesized by reverse micelle method" in Scientific Reports, 4 (2014),
https://doi.org/10.1038/srep04209 . .

TY  - JOUR
AU  - Gavrilović, Tamara V.
AU  - Nikolić, Marko G.
AU  - Jovanović, Dragana J.
AU  - Dramićanin, Miroslav
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7024
AB  - The aim of this work is to study up-conversion (UPC) luminescence in a series of Tm3+/Yb3+-co-doped GdVO4 samples synthesized by the solid-state method. The concentrations of Yb3+ ions were 3, 6 and 9 mol.%, while the concentration of Tm3+ ions was fixed (3 mol.%). X-ray diffraction patterns for all the synthesized samples confirmed successful formation of a pure GdVO4 phase. Quantitative energy-dispersion x-ray analysis confirmed successful doping of Tm3+ and Yb3+ ions into the GdVO4 matrix. Scanning electron microscope images show that the samples are composed of deformed (irregular) spherical particles with an average diameter size in the range of 1.4-8.4 mu m. Up-converted emission spectra were recorded at room temperature under 980 nm excitation. It was found that all our samples exhibit UPC emission in three different spectral regions: strong emissions are observed at 475 and 800 nm corresponding to the (1)G(4) - GT H-3(6) and H-3(4) - GT 3H6 transitions, respectively, while emission in the red region at about 650 nm is very weak and is due to the (1)G(4) - GT F-3(4) transition. It was concluded that conversion of near-infrared radiation into blue emission proved to be very effective in all the synthesized systems. It was found that emission decay curves for all samples exhibit single exponential behavior.
T2  - Physica Scripta
T1  - Up-conversion luminescence of Tm3+ sensitized by Yb3+ ions in GdVO4
VL  - T157
DO  - 10.1088/0031-8949/2013/T157/014055
ER  - 

@article{
author = "Gavrilović, Tamara V. and Nikolić, Marko G. and Jovanović, Dragana J. and Dramićanin, Miroslav",
year = "2013",
abstract = "The aim of this work is to study up-conversion (UPC) luminescence in a series of Tm3+/Yb3+-co-doped GdVO4 samples synthesized by the solid-state method. The concentrations of Yb3+ ions were 3, 6 and 9 mol.%, while the concentration of Tm3+ ions was fixed (3 mol.%). X-ray diffraction patterns for all the synthesized samples confirmed successful formation of a pure GdVO4 phase. Quantitative energy-dispersion x-ray analysis confirmed successful doping of Tm3+ and Yb3+ ions into the GdVO4 matrix. Scanning electron microscope images show that the samples are composed of deformed (irregular) spherical particles with an average diameter size in the range of 1.4-8.4 mu m. Up-converted emission spectra were recorded at room temperature under 980 nm excitation. It was found that all our samples exhibit UPC emission in three different spectral regions: strong emissions are observed at 475 and 800 nm corresponding to the (1)G(4) - GT H-3(6) and H-3(4) - GT 3H6 transitions, respectively, while emission in the red region at about 650 nm is very weak and is due to the (1)G(4) - GT F-3(4) transition. It was concluded that conversion of near-infrared radiation into blue emission proved to be very effective in all the synthesized systems. It was found that emission decay curves for all samples exhibit single exponential behavior.",
journal = "Physica Scripta",
title = "Up-conversion luminescence of Tm3+ sensitized by Yb3+ ions in GdVO4",
volume = "T157",
doi = "10.1088/0031-8949/2013/T157/014055"
}

Gavrilović, T. V., Nikolić, M. G., Jovanović, D. J.,& Dramićanin, M.. (2013). Up-conversion luminescence of Tm3+ sensitized by Yb3+ ions in GdVO4. in Physica Scripta, T157.
https://doi.org/10.1088/0031-8949/2013/T157/014055

Gavrilović TV, Nikolić MG, Jovanović DJ, Dramićanin M. Up-conversion luminescence of Tm3+ sensitized by Yb3+ ions in GdVO4. in Physica Scripta. 2013;T157.
doi:10.1088/0031-8949/2013/T157/014055 .

Gavrilović, Tamara V., Nikolić, Marko G., Jovanović, Dragana J., Dramićanin, Miroslav, "Up-conversion luminescence of Tm3+ sensitized by Yb3+ ions in GdVO4" in Physica Scripta, T157 (2013),
https://doi.org/10.1088/0031-8949/2013/T157/014055 . .