TY  - JOUR
AU  - Brik, Mikhail G.
AU  - Antić, Željka
AU  - Vuković, Katarina
AU  - Dramićanin, Miroslav
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7084
AB  - Preparation and spectroscopic studies of the TiO2 nanopowders doped with Eu3+ ions are described. Efficient emission in the red part of the visible spectrum can be obtained due to the D-5(0) - GT F-7(2) emission of europium ions. Quantum efficiency of such emission was estimated to be about 0.83, which indicates a rather weak role of the non-radiative losses. However, the increase of Eu3+ concentration up to 10 at% significantly lowers the quantum efficiency because of the energy transfer and re-absorption processes. Higher doping concentrations (larger than 3 at% of Eu3+) also decrease the covalency of the Eu3+-O2- chemical bonds.
T2  - Materials Transactions. JIM / Japan Institute of Metals
T1  - Judd-Ofelt Analysis of Eu3+ Emission in TiO2 Anatase Nanoparticles
VL  - 56
IS  - 9
SP  - 1416
EP  - 1418
DO  - 10.2320/matertrans.MA201566
ER  - 

@article{
author = "Brik, Mikhail G. and Antić, Željka and Vuković, Katarina and Dramićanin, Miroslav",
year = "2015",
abstract = "Preparation and spectroscopic studies of the TiO2 nanopowders doped with Eu3+ ions are described. Efficient emission in the red part of the visible spectrum can be obtained due to the D-5(0) - GT F-7(2) emission of europium ions. Quantum efficiency of such emission was estimated to be about 0.83, which indicates a rather weak role of the non-radiative losses. However, the increase of Eu3+ concentration up to 10 at% significantly lowers the quantum efficiency because of the energy transfer and re-absorption processes. Higher doping concentrations (larger than 3 at% of Eu3+) also decrease the covalency of the Eu3+-O2- chemical bonds.",
journal = "Materials Transactions. JIM / Japan Institute of Metals",
title = "Judd-Ofelt Analysis of Eu3+ Emission in TiO2 Anatase Nanoparticles",
volume = "56",
number = "9",
pages = "1416-1418",
doi = "10.2320/matertrans.MA201566"
}

Brik, M. G., Antić, Ž., Vuković, K.,& Dramićanin, M.. (2015). Judd-Ofelt Analysis of Eu3+ Emission in TiO2 Anatase Nanoparticles. in Materials Transactions. JIM / Japan Institute of Metals, 56(9), 1416-1418.
https://doi.org/10.2320/matertrans.MA201566

Brik MG, Antić Ž, Vuković K, Dramićanin M. Judd-Ofelt Analysis of Eu3+ Emission in TiO2 Anatase Nanoparticles. in Materials Transactions. JIM / Japan Institute of Metals. 2015;56(9):1416-1418.
doi:10.2320/matertrans.MA201566 .

Brik, Mikhail G., Antić, Željka, Vuković, Katarina, Dramićanin, Miroslav, "Judd-Ofelt Analysis of Eu3+ Emission in TiO2 Anatase Nanoparticles" in Materials Transactions. JIM / Japan Institute of Metals, 56, no. 9 (2015):1416-1418,
https://doi.org/10.2320/matertrans.MA201566 . .

TY  - JOUR
AU  - Medić, Mina M.
AU  - Brik, Mikhail G.
AU  - Dražić, Goran
AU  - Antić, Željka
AU  - Lojpur, Vesna
AU  - Dramićanin, Miroslav
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/351
T2  - Journal of Physical Chemistry. C
T1  - Deep-Red Emitting Mn4+ Doped Mg2TiO4 Nanoparticles
VL  - 119
IS  - 1
SP  - 724
EP  - 730
DO  - 10.1021/jp5095646
ER  - 

@article{
author = "Medić, Mina M. and Brik, Mikhail G. and Dražić, Goran and Antić, Željka and Lojpur, Vesna and Dramićanin, Miroslav",
year = "2015",
journal = "Journal of Physical Chemistry. C",
title = "Deep-Red Emitting Mn4+ Doped Mg2TiO4 Nanoparticles",
volume = "119",
number = "1",
pages = "724-730",
doi = "10.1021/jp5095646"
}

Medić, M. M., Brik, M. G., Dražić, G., Antić, Ž., Lojpur, V.,& Dramićanin, M.. (2015). Deep-Red Emitting Mn4+ Doped Mg2TiO4 Nanoparticles. in Journal of Physical Chemistry. C, 119(1), 724-730.
https://doi.org/10.1021/jp5095646

Medić MM, Brik MG, Dražić G, Antić Ž, Lojpur V, Dramićanin M. Deep-Red Emitting Mn4+ Doped Mg2TiO4 Nanoparticles. in Journal of Physical Chemistry. C. 2015;119(1):724-730.
doi:10.1021/jp5095646 .

Medić, Mina M., Brik, Mikhail G., Dražić, Goran, Antić, Željka, Lojpur, Vesna, Dramićanin, Miroslav, "Deep-Red Emitting Mn4+ Doped Mg2TiO4 Nanoparticles" in Journal of Physical Chemistry. C, 119, no. 1 (2015):724-730,
https://doi.org/10.1021/jp5095646 . .

TY  - JOUR
AU  - Krsmanović, Radenka
AU  - Antić, Željka
AU  - Speghini, Adolfo
AU  - Brik, Mikhail G.
AU  - Bartova, Barbora
AU  - Bettinelli, Marco
AU  - Dramićanin, Miroslav
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5944
AB  - A series of europium doped (LuxGd1-x)(2)O-3 (x = 1, 0.75, 0.5, 0.25 and 0) nanocrystalline powders were prepared using a polymer complex solution method based on a polyethylene glycol (PEG) as fuel. The samples were systematically characterized by powder X-ray diffraction, scanning and transmission electron microscopies and luminescence spectroscopy. The powders consisted of well-crystalline, cubic phase nanoparticles of 20-50 nm in size, which unit cell parameter increased with Gd content complying with Vegards law. Upon blue light excitation all samples exhibited strong red luminescence typical of trivalent europium ion. The maximum splitting of the F-7(1) manifold changed linearly with the composition change and decreased with lowering of the crystal field strength. Relatively long lifetime values were obtained for D-5(0) (similar to 1.4 ms) and D-5(1) (similar to 120 mu s) levels. For all samples we estimated theoretical densities, refractive index coefficients, optical filling factors and Z(eff), in order to estimate the Judd-Ofelt intensity parameters and branching ratios. The calculated lifetime of D-5(0) level was in line with experimentally obtained luminescence lifetime values. Relative integrated emissions were measured on all samples and Gd2O3 sample proved to have a maximum amount of the characteristic Eu3+ luminescence. (C) 2014 Elsevier B.V. All rights reserved.
T2  - Optical Materials
T1  - Structural and spectroscopic studies of Eu3+ doped Lu2O3-Gd2O3 solid solutions
VL  - 36
IS  - 6
SP  - 1083
EP  - 1091
DO  - 10.1016/j.optmat.2014.01.039
ER  - 

@article{
author = "Krsmanović, Radenka and Antić, Željka and Speghini, Adolfo and Brik, Mikhail G. and Bartova, Barbora and Bettinelli, Marco and Dramićanin, Miroslav",
year = "2014",
abstract = "A series of europium doped (LuxGd1-x)(2)O-3 (x = 1, 0.75, 0.5, 0.25 and 0) nanocrystalline powders were prepared using a polymer complex solution method based on a polyethylene glycol (PEG) as fuel. The samples were systematically characterized by powder X-ray diffraction, scanning and transmission electron microscopies and luminescence spectroscopy. The powders consisted of well-crystalline, cubic phase nanoparticles of 20-50 nm in size, which unit cell parameter increased with Gd content complying with Vegards law. Upon blue light excitation all samples exhibited strong red luminescence typical of trivalent europium ion. The maximum splitting of the F-7(1) manifold changed linearly with the composition change and decreased with lowering of the crystal field strength. Relatively long lifetime values were obtained for D-5(0) (similar to 1.4 ms) and D-5(1) (similar to 120 mu s) levels. For all samples we estimated theoretical densities, refractive index coefficients, optical filling factors and Z(eff), in order to estimate the Judd-Ofelt intensity parameters and branching ratios. The calculated lifetime of D-5(0) level was in line with experimentally obtained luminescence lifetime values. Relative integrated emissions were measured on all samples and Gd2O3 sample proved to have a maximum amount of the characteristic Eu3+ luminescence. (C) 2014 Elsevier B.V. All rights reserved.",
journal = "Optical Materials",
title = "Structural and spectroscopic studies of Eu3+ doped Lu2O3-Gd2O3 solid solutions",
volume = "36",
number = "6",
pages = "1083-1091",
doi = "10.1016/j.optmat.2014.01.039"
}

Krsmanović, R., Antić, Ž., Speghini, A., Brik, M. G., Bartova, B., Bettinelli, M.,& Dramićanin, M.. (2014). Structural and spectroscopic studies of Eu3+ doped Lu2O3-Gd2O3 solid solutions. in Optical Materials, 36(6), 1083-1091.
https://doi.org/10.1016/j.optmat.2014.01.039

Krsmanović R, Antić Ž, Speghini A, Brik MG, Bartova B, Bettinelli M, Dramićanin M. Structural and spectroscopic studies of Eu3+ doped Lu2O3-Gd2O3 solid solutions. in Optical Materials. 2014;36(6):1083-1091.
doi:10.1016/j.optmat.2014.01.039 .

Krsmanović, Radenka, Antić, Željka, Speghini, Adolfo, Brik, Mikhail G., Bartova, Barbora, Bettinelli, Marco, Dramićanin, Miroslav, "Structural and spectroscopic studies of Eu3+ doped Lu2O3-Gd2O3 solid solutions" in Optical Materials, 36, no. 6 (2014):1083-1091,
https://doi.org/10.1016/j.optmat.2014.01.039 . .