TY  - JOUR
AU  - Papan, Jelena
AU  - Jovanović, Dragana J.
AU  - Sekulić, Milica
AU  - Glais, Estelle
AU  - Dramićanin, Miroslav
PY  - 2019
UR  - https://linkinghub.elsevier.com/retrieve/pii/S0032591019301093
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8057
AB  - Defect-fluorite structured Eu 3+ -doped Y 2 Sn 2 O 7 nanoparticles (30–40 nm) were successfully prepared through a facile co-precipitation method without any organic additives or templates followed by calcination in air. Luminescent properties of the as-prepared Y 2-x Eu x Sn 2 O 7 (0.02 ≤ x ≤ 0.6) nanophosphors were fully characterized from an experimental and theoretical point of view (excitation, emission, lifetime, critical concentration, temperature-dependent luminescence and thermal stability, type of interactions and the Judd-Ofelt analysis). The nanophosphors showed relatively sharp excitation bands from 360 to 530 nm and exhibited characteristic emission bands with the most intensive emission centered at 612 nm. In addition, Gd 1.98 Eu 0.02 Sn 2 O 7 and Lu 1.98 Eu 0.02 Sn 2 O 7 samples were prepared in order to study how substitution of RE 3+ (Y 3+ with Gd 3+ and Lu 3+ ions) influences on luminescent properties of RE 1.98 Eu 0.02 Sn 2 O 7 and thermal stability of their luminescence. In order to understand better luminescent properties, the Judd–Ofelt analysis was applied to all the synthesized powders. The highest value of quantum efficiency, ~96%, was estimated for Lu 1.98 Eu 0.02 Sn 2 O 7 . To assess potential application in high-power LEDs, the temperature-dependent emission spectra of Y 1.98 Eu 0.02 Sn 2 O 7 , Gd 1.98 Eu 0.02 Sn 2 O 7 and Lu 1.98 Eu 0.02 Sn 2 O 7 nanophosphors were studied. © 2019 Elsevier B.V.
T2  - Powder Technology
T1  - Photoluminescence properties and thermal stability of RE2-xEuxSn2O7 (RE = Y3+, Gd3+, Lu3+) red nanophosphors: An experimental and theoretical study
VL  - 346
SP  - 150
EP  - 159
DO  - 10.1016/j.powtec.2019.02.013
ER  - 

@article{
author = "Papan, Jelena and Jovanović, Dragana J. and Sekulić, Milica and Glais, Estelle and Dramićanin, Miroslav",
year = "2019",
abstract = "Defect-fluorite structured Eu 3+ -doped Y 2 Sn 2 O 7 nanoparticles (30–40 nm) were successfully prepared through a facile co-precipitation method without any organic additives or templates followed by calcination in air. Luminescent properties of the as-prepared Y 2-x Eu x Sn 2 O 7 (0.02 ≤ x ≤ 0.6) nanophosphors were fully characterized from an experimental and theoretical point of view (excitation, emission, lifetime, critical concentration, temperature-dependent luminescence and thermal stability, type of interactions and the Judd-Ofelt analysis). The nanophosphors showed relatively sharp excitation bands from 360 to 530 nm and exhibited characteristic emission bands with the most intensive emission centered at 612 nm. In addition, Gd 1.98 Eu 0.02 Sn 2 O 7 and Lu 1.98 Eu 0.02 Sn 2 O 7 samples were prepared in order to study how substitution of RE 3+ (Y 3+ with Gd 3+ and Lu 3+ ions) influences on luminescent properties of RE 1.98 Eu 0.02 Sn 2 O 7 and thermal stability of their luminescence. In order to understand better luminescent properties, the Judd–Ofelt analysis was applied to all the synthesized powders. The highest value of quantum efficiency, ~96%, was estimated for Lu 1.98 Eu 0.02 Sn 2 O 7 . To assess potential application in high-power LEDs, the temperature-dependent emission spectra of Y 1.98 Eu 0.02 Sn 2 O 7 , Gd 1.98 Eu 0.02 Sn 2 O 7 and Lu 1.98 Eu 0.02 Sn 2 O 7 nanophosphors were studied. © 2019 Elsevier B.V.",
journal = "Powder Technology",
title = "Photoluminescence properties and thermal stability of RE2-xEuxSn2O7 (RE = Y3+, Gd3+, Lu3+) red nanophosphors: An experimental and theoretical study",
volume = "346",
pages = "150-159",
doi = "10.1016/j.powtec.2019.02.013"
}

Papan, J., Jovanović, D. J., Sekulić, M., Glais, E.,& Dramićanin, M.. (2019). Photoluminescence properties and thermal stability of RE2-xEuxSn2O7 (RE = Y3+, Gd3+, Lu3+) red nanophosphors: An experimental and theoretical study. in Powder Technology, 346, 150-159.
https://doi.org/10.1016/j.powtec.2019.02.013

Papan J, Jovanović DJ, Sekulić M, Glais E, Dramićanin M. Photoluminescence properties and thermal stability of RE2-xEuxSn2O7 (RE = Y3+, Gd3+, Lu3+) red nanophosphors: An experimental and theoretical study. in Powder Technology. 2019;346:150-159.
doi:10.1016/j.powtec.2019.02.013 .

Papan, Jelena, Jovanović, Dragana J., Sekulić, Milica, Glais, Estelle, Dramićanin, Miroslav, "Photoluminescence properties and thermal stability of RE2-xEuxSn2O7 (RE = Y3+, Gd3+, Lu3+) red nanophosphors: An experimental and theoretical study" in Powder Technology, 346 (2019):150-159,
https://doi.org/10.1016/j.powtec.2019.02.013 . .

TY  - JOUR
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7587
AB  - Dy3+-and Nd3+-doped YNbO4 powders were prepared using a mechanochemical method followed by annealing, and their photoluminescent properties were examined to assess the possibility of their use in phosphor thermometry. Luminescence intensity ratio technique was used as a temperature readout scheme for both YNba(4):Dy3+ and YNbO4:Nd3+ samples. The crystalline structure of the samples is confirmed by XRD measurements, while SEM was used for the microstructural and compositional characterization. Sample doped with Dy3+ ions emitting in the blue region has been investigated in the 293-773 K temperature range and exhibits maximal relative sensitivity of 1.97% K-1 at 300 K. YNbO4:Nd3+ sample showed intense NIR emission which fall into the first biological window. When heated from 303 up to 473 K relative temperature sensitivity of 0.28%K-1 at 300 K was achieved. Values of temperature sensitivities show that YNbO4 has a large potential for the development of thermographic phosphors in the blue and NIR spectral ranges when doped with trivalent Dy and Nd, respectively. (C) 2017 Elsevier B.V. All rights reserved.
T2  - Sensors and Actuators A: Physical
T1  - Luminescence temperature sensing in visible and NIR spectral range using Dy3+ and Nd3+ doped YNbO4
VL  - 270
SP  - 89
EP  - 96
DO  - 10.1016/j.sna.2017.12.044
ER  - 

@article{
year = "2018",
abstract = "Dy3+-and Nd3+-doped YNbO4 powders were prepared using a mechanochemical method followed by annealing, and their photoluminescent properties were examined to assess the possibility of their use in phosphor thermometry. Luminescence intensity ratio technique was used as a temperature readout scheme for both YNba(4):Dy3+ and YNbO4:Nd3+ samples. The crystalline structure of the samples is confirmed by XRD measurements, while SEM was used for the microstructural and compositional characterization. Sample doped with Dy3+ ions emitting in the blue region has been investigated in the 293-773 K temperature range and exhibits maximal relative sensitivity of 1.97% K-1 at 300 K. YNbO4:Nd3+ sample showed intense NIR emission which fall into the first biological window. When heated from 303 up to 473 K relative temperature sensitivity of 0.28%K-1 at 300 K was achieved. Values of temperature sensitivities show that YNbO4 has a large potential for the development of thermographic phosphors in the blue and NIR spectral ranges when doped with trivalent Dy and Nd, respectively. (C) 2017 Elsevier B.V. All rights reserved.",
journal = "Sensors and Actuators A: Physical",
title = "Luminescence temperature sensing in visible and NIR spectral range using Dy3+ and Nd3+ doped YNbO4",
volume = "270",
pages = "89-96",
doi = "10.1016/j.sna.2017.12.044"
}

(2018). Luminescence temperature sensing in visible and NIR spectral range using Dy3+ and Nd3+ doped YNbO4. in Sensors and Actuators A: Physical, 270, 89-96.
https://doi.org/10.1016/j.sna.2017.12.044

Luminescence temperature sensing in visible and NIR spectral range using Dy3+ and Nd3+ doped YNbO4. in Sensors and Actuators A: Physical. 2018;270:89-96.
doi:10.1016/j.sna.2017.12.044 .

"Luminescence temperature sensing in visible and NIR spectral range using Dy3+ and Nd3+ doped YNbO4" in Sensors and Actuators A: Physical, 270 (2018):89-96,
https://doi.org/10.1016/j.sna.2017.12.044 . .

TY  - JOUR
AU  - Vujčić, Ivica
AU  - Glais, Estelle
AU  - Vuković, Katarina
AU  - Sekulić, Milica
AU  - Mašić, Slobodan
AU  - Chaneac, Corinne
AU  - Dramićanin, Miroslav
AU  - Viana, Bruno
PY  - 2018
UR  - https://linkinghub.elsevier.com/retrieve/pii/S0925346718307262
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7956
AB  - (Y1-xLnx)2O3 oxides (Ln = Y, Gd, Lu) doped with Eu3+ ions are widely used as commercialized scintillators in medical and industrial scanning applications, with high performance and attractive properties. In this work, effects of high-energy radiation on luminescence properties of (Y1-xGdx)2O3: Eu3+ powders with different particle sizes in the nanometric range are analyzed. Powders were prepared by polymer complex solution route, followed by annealing. Nanoparticles were obtained with an average size between 20 and 120 nm according to annealing conditions (time and temperature). Samples were exposed to gamma-irradiation (doses up to 4 MGy) on a commercial gamma-irradiation plant. The effect of irradiation on different nanoparticle size is followed by XRD, TEM and monitoring their luminescence properties. No change was observed in structure, morphology and steady-state emission. On the opposite after irradiation, excited-state lifetimes and quantum efficiency values are particle size dependent. © 2018 Elsevier B.V.
T2  - Optical Materials
T1  - Radiation effects, photoluminescence and radioluminescence of Eu-doped (Y0.7Gd0.3)2O3 nanoparticles with various sizes
VL  - 86
SP  - 582
EP  - 589
DO  - 10.1016/j.optmat.2018.10.049
ER  - 

@article{
author = "Vujčić, Ivica and Glais, Estelle and Vuković, Katarina and Sekulić, Milica and Mašić, Slobodan and Chaneac, Corinne and Dramićanin, Miroslav and Viana, Bruno",
year = "2018",
abstract = "(Y1-xLnx)2O3 oxides (Ln = Y, Gd, Lu) doped with Eu3+ ions are widely used as commercialized scintillators in medical and industrial scanning applications, with high performance and attractive properties. In this work, effects of high-energy radiation on luminescence properties of (Y1-xGdx)2O3: Eu3+ powders with different particle sizes in the nanometric range are analyzed. Powders were prepared by polymer complex solution route, followed by annealing. Nanoparticles were obtained with an average size between 20 and 120 nm according to annealing conditions (time and temperature). Samples were exposed to gamma-irradiation (doses up to 4 MGy) on a commercial gamma-irradiation plant. The effect of irradiation on different nanoparticle size is followed by XRD, TEM and monitoring their luminescence properties. No change was observed in structure, morphology and steady-state emission. On the opposite after irradiation, excited-state lifetimes and quantum efficiency values are particle size dependent. © 2018 Elsevier B.V.",
journal = "Optical Materials",
title = "Radiation effects, photoluminescence and radioluminescence of Eu-doped (Y0.7Gd0.3)2O3 nanoparticles with various sizes",
volume = "86",
pages = "582-589",
doi = "10.1016/j.optmat.2018.10.049"
}

Vujčić, I., Glais, E., Vuković, K., Sekulić, M., Mašić, S., Chaneac, C., Dramićanin, M.,& Viana, B.. (2018). Radiation effects, photoluminescence and radioluminescence of Eu-doped (Y0.7Gd0.3)2O3 nanoparticles with various sizes. in Optical Materials, 86, 582-589.
https://doi.org/10.1016/j.optmat.2018.10.049

Vujčić I, Glais E, Vuković K, Sekulić M, Mašić S, Chaneac C, Dramićanin M, Viana B. Radiation effects, photoluminescence and radioluminescence of Eu-doped (Y0.7Gd0.3)2O3 nanoparticles with various sizes. in Optical Materials. 2018;86:582-589.
doi:10.1016/j.optmat.2018.10.049 .

Vujčić, Ivica, Glais, Estelle, Vuković, Katarina, Sekulić, Milica, Mašić, Slobodan, Chaneac, Corinne, Dramićanin, Miroslav, Viana, Bruno, "Radiation effects, photoluminescence and radioluminescence of Eu-doped (Y0.7Gd0.3)2O3 nanoparticles with various sizes" in Optical Materials, 86 (2018):582-589,
https://doi.org/10.1016/j.optmat.2018.10.049 . .

TY  - JOUR
AU  - Glais, Estelle
AU  - Đorđević, Vesna R.
AU  - Papan, Jelena
AU  - Viana, Bruno
AU  - Dramićanin, Miroslav
PY  - 2018
UR  - http://xlink.rsc.org/?DOI=C8RA02482K
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7693
AB  - MgTiO3 nanoparticles doped with Mn4+, with homogeneous size ranging about 63.1 ± 9.8 nm, were synthesized by a molten salt assisted sol gel method. These nanoparticles have been investigated as optical thermal sensors. The luminescence of tetravalent manganese ion in octahedral environment within the perovskite host presents drastic variations with temperature. Three different thermometry approaches have been proposed and characterized. Two luminescence intensity ratios are studied. Firstly between the two R-lines of Mn4+ emission at low temperature (-250 °C and -90 °C) with a maximal sensitivity of 0.9% °C-1, but also secondly between 2E → 4A2 (R-line) and the 4T2 → 4A2 transitions. This allows studying the temperature variation within a larger temperature range (-200 °C to 50 °C) with a sensitivity between 0.6% °C-1 and 1.2% °C-1 over this range. The last proposed method is the study of the lifetime variation versus temperature. The effective lifetime value corresponds to a combination of transitions from two excited energy levels of the tetravalent manganese (2E and 4T2) in thermal equilibrium toward the fundamental 4A2 state. Since the more energetic transition (4T2 → 4A2) is spin-allowed, contrary to the 2E → 4A2 one, the lifetime drastically decreases with the increase in temperature leading to an impressive high sensitivity value of 4.1% °C-1 at 4 °C and an exceptional temperature resolution of 0.025 °C. According to their optical features, MgTiO3:Mn4+ nanoparticles are indeed suitable candidates for the luminescence temperature probes at the nanoscale over several temperature ranges.
T2  - RSC Advances
T1  - MgTiO 3:Mn 4+ a multi-reading temperature nanoprobe
VL  - 8
IS  - 33
SP  - 18341
EP  - 18346
DO  - 10.1039/C8RA02482K
ER  - 

@article{
author = "Glais, Estelle and Đorđević, Vesna R. and Papan, Jelena and Viana, Bruno and Dramićanin, Miroslav",
year = "2018",
abstract = "MgTiO3 nanoparticles doped with Mn4+, with homogeneous size ranging about 63.1 ± 9.8 nm, were synthesized by a molten salt assisted sol gel method. These nanoparticles have been investigated as optical thermal sensors. The luminescence of tetravalent manganese ion in octahedral environment within the perovskite host presents drastic variations with temperature. Three different thermometry approaches have been proposed and characterized. Two luminescence intensity ratios are studied. Firstly between the two R-lines of Mn4+ emission at low temperature (-250 °C and -90 °C) with a maximal sensitivity of 0.9% °C-1, but also secondly between 2E → 4A2 (R-line) and the 4T2 → 4A2 transitions. This allows studying the temperature variation within a larger temperature range (-200 °C to 50 °C) with a sensitivity between 0.6% °C-1 and 1.2% °C-1 over this range. The last proposed method is the study of the lifetime variation versus temperature. The effective lifetime value corresponds to a combination of transitions from two excited energy levels of the tetravalent manganese (2E and 4T2) in thermal equilibrium toward the fundamental 4A2 state. Since the more energetic transition (4T2 → 4A2) is spin-allowed, contrary to the 2E → 4A2 one, the lifetime drastically decreases with the increase in temperature leading to an impressive high sensitivity value of 4.1% °C-1 at 4 °C and an exceptional temperature resolution of 0.025 °C. According to their optical features, MgTiO3:Mn4+ nanoparticles are indeed suitable candidates for the luminescence temperature probes at the nanoscale over several temperature ranges.",
journal = "RSC Advances",
title = "MgTiO 3:Mn 4+ a multi-reading temperature nanoprobe",
volume = "8",
number = "33",
pages = "18341-18346",
doi = "10.1039/C8RA02482K"
}

Glais, E., Đorđević, V. R., Papan, J., Viana, B.,& Dramićanin, M.. (2018). MgTiO 3:Mn 4+ a multi-reading temperature nanoprobe. in RSC Advances, 8(33), 18341-18346.
https://doi.org/10.1039/C8RA02482K

Glais E, Đorđević VR, Papan J, Viana B, Dramićanin M. MgTiO 3:Mn 4+ a multi-reading temperature nanoprobe. in RSC Advances. 2018;8(33):18341-18346.
doi:10.1039/C8RA02482K .

Glais, Estelle, Đorđević, Vesna R., Papan, Jelena, Viana, Bruno, Dramićanin, Miroslav, "MgTiO 3:Mn 4+ a multi-reading temperature nanoprobe" in RSC Advances, 8, no. 33 (2018):18341-18346,
https://doi.org/10.1039/C8RA02482K . .

TY  - JOUR
AU  - Đorđević, Vesna R.
AU  - Brik, Mikhail G.
AU  - Srivastava, Alok M.
AU  - Medić, Mina M.
AU  - Vulić, Predrag J.
AU  - Glais, Estelle
AU  - Viana, Bruno
AU  - Dramićanin, Miroslav
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7197
AB  - Herein, the synthesis, structural and crystal field analysis and optical spectroscopy of Mn4+ doped metal titanates ATiO(3) (A = Ca, Mg) are presented. Materials of desired phase were prepared by molten salt assisted sol-gel method in the powder form. Crystallographic data of samples were obtained by refinement of X-ray diffraction measurements. From experimental excitation and emission spectra and structural data, crystal field parameters and energy levels of Mn4+ in CaTiO3 and MgTiO3 were calculated by the exchange charge model of crystal-field theory. It is found that crystalline field strength is lower (Dq = 1831 cm(-1)) in the rhombohedral Ilmenite MgTiO3 structure due to the relatively longer average Mn4+-O2- bond distance (2.059 angstrom), and higher (Dq = 2017 cm(-1)) in orthorhombic CaTiO3 which possess shorter average Mn4+-O2- bond distance (1.956 angstrom). Spectral positions of the Mn(4+2)Eg - GT (4)A(2g) transition maxima is 709 nm in MgTiO3 and 717 nm in CaTiO3 respectively in good agreement with calculated values. (C) 2017 Elsevier B.V. All rights reserved.
T2  - Optical Materials
T1  - Luminescence of Mn4+ ions in CaTiO3 and MgTiO3 perovskites: Relationship of experimental spectroscopic data and crystal field calculations
VL  - 74
SP  - 46
EP  - 51
DO  - 10.1016/j.optmat.2017.03.021
ER  - 

@article{
author = "Đorđević, Vesna R. and Brik, Mikhail G. and Srivastava, Alok M. and Medić, Mina M. and Vulić, Predrag J. and Glais, Estelle and Viana, Bruno and Dramićanin, Miroslav",
year = "2017",
abstract = "Herein, the synthesis, structural and crystal field analysis and optical spectroscopy of Mn4+ doped metal titanates ATiO(3) (A = Ca, Mg) are presented. Materials of desired phase were prepared by molten salt assisted sol-gel method in the powder form. Crystallographic data of samples were obtained by refinement of X-ray diffraction measurements. From experimental excitation and emission spectra and structural data, crystal field parameters and energy levels of Mn4+ in CaTiO3 and MgTiO3 were calculated by the exchange charge model of crystal-field theory. It is found that crystalline field strength is lower (Dq = 1831 cm(-1)) in the rhombohedral Ilmenite MgTiO3 structure due to the relatively longer average Mn4+-O2- bond distance (2.059 angstrom), and higher (Dq = 2017 cm(-1)) in orthorhombic CaTiO3 which possess shorter average Mn4+-O2- bond distance (1.956 angstrom). Spectral positions of the Mn(4+2)Eg - GT (4)A(2g) transition maxima is 709 nm in MgTiO3 and 717 nm in CaTiO3 respectively in good agreement with calculated values. (C) 2017 Elsevier B.V. All rights reserved.",
journal = "Optical Materials",
title = "Luminescence of Mn4+ ions in CaTiO3 and MgTiO3 perovskites: Relationship of experimental spectroscopic data and crystal field calculations",
volume = "74",
pages = "46-51",
doi = "10.1016/j.optmat.2017.03.021"
}

Đorđević, V. R., Brik, M. G., Srivastava, A. M., Medić, M. M., Vulić, P. J., Glais, E., Viana, B.,& Dramićanin, M.. (2017). Luminescence of Mn4+ ions in CaTiO3 and MgTiO3 perovskites: Relationship of experimental spectroscopic data and crystal field calculations. in Optical Materials, 74, 46-51.
https://doi.org/10.1016/j.optmat.2017.03.021

Đorđević VR, Brik MG, Srivastava AM, Medić MM, Vulić PJ, Glais E, Viana B, Dramićanin M. Luminescence of Mn4+ ions in CaTiO3 and MgTiO3 perovskites: Relationship of experimental spectroscopic data and crystal field calculations. in Optical Materials. 2017;74:46-51.
doi:10.1016/j.optmat.2017.03.021 .

Đorđević, Vesna R., Brik, Mikhail G., Srivastava, Alok M., Medić, Mina M., Vulić, Predrag J., Glais, Estelle, Viana, Bruno, Dramićanin, Miroslav, "Luminescence of Mn4+ ions in CaTiO3 and MgTiO3 perovskites: Relationship of experimental spectroscopic data and crystal field calculations" in Optical Materials, 74 (2017):46-51,
https://doi.org/10.1016/j.optmat.2017.03.021 . .