TY  - JOUR
AU  - Kahouadji, Badis
AU  - Guerbous, Lakhdar
AU  - Boukerika, Allaoua
AU  - Dolić, Slobodan D.
AU  - Jovanović, Dragana J.
AU  - Dramićanin, Miroslav
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7645
AB  - Nanopowders of YPO4 phosphors with different Pr3+ doping were successfully prepared by a sol gel method under different synthesis conditions. The crystallite size and strain show a strong dependence on the Pr3+ doping concentration and on the annealing temperature. By annealing at 300 degrees C one can obtain the xenotime structure of the pure YPO4. The crystallite size can be controlled by controlling the annealing temperature and it increases with increasing the annealing temperature. The room temperature inter-configurational 4f(2) <-> 4f5d and intra-configurational 4f(2) <-> 4f(2) emission-excitation transitions spectra are measured and investigated. Upon 4f(2) <- 4f5d excitation transition, all the samples present broad intense emission bands attributed to 4f5d -> 4f(2) emission transitions and peaks in red region assigned to D-1(2) -> H-3(4) transition as photon cascade emission phenomena (PCE). The presence of only D-1(2) -> H-3(4) transition is discussed. In addition, the D-1(2) energy level lifetimes as well as the refractive indexes were determined and discussed.
T2  - Current Applied Physics
T1  - Intra- and inter-configurational luminescence spectroscopy of Pr 3+ -doped YPO 4 nanophosphors
VL  - 18
IS  - 4
SP  - 437
EP  - 446
DO  - 10.1016/j.cap.2018.01.012
ER  - 

@article{
author = "Kahouadji, Badis and Guerbous, Lakhdar and Boukerika, Allaoua and Dolić, Slobodan D. and Jovanović, Dragana J. and Dramićanin, Miroslav",
year = "2018",
abstract = "Nanopowders of YPO4 phosphors with different Pr3+ doping were successfully prepared by a sol gel method under different synthesis conditions. The crystallite size and strain show a strong dependence on the Pr3+ doping concentration and on the annealing temperature. By annealing at 300 degrees C one can obtain the xenotime structure of the pure YPO4. The crystallite size can be controlled by controlling the annealing temperature and it increases with increasing the annealing temperature. The room temperature inter-configurational 4f(2) <-> 4f5d and intra-configurational 4f(2) <-> 4f(2) emission-excitation transitions spectra are measured and investigated. Upon 4f(2) <- 4f5d excitation transition, all the samples present broad intense emission bands attributed to 4f5d -> 4f(2) emission transitions and peaks in red region assigned to D-1(2) -> H-3(4) transition as photon cascade emission phenomena (PCE). The presence of only D-1(2) -> H-3(4) transition is discussed. In addition, the D-1(2) energy level lifetimes as well as the refractive indexes were determined and discussed.",
journal = "Current Applied Physics",
title = "Intra- and inter-configurational luminescence spectroscopy of Pr 3+ -doped YPO 4 nanophosphors",
volume = "18",
number = "4",
pages = "437-446",
doi = "10.1016/j.cap.2018.01.012"
}

Kahouadji, B., Guerbous, L., Boukerika, A., Dolić, S. D., Jovanović, D. J.,& Dramićanin, M.. (2018). Intra- and inter-configurational luminescence spectroscopy of Pr 3+ -doped YPO 4 nanophosphors. in Current Applied Physics, 18(4), 437-446.
https://doi.org/10.1016/j.cap.2018.01.012

Kahouadji B, Guerbous L, Boukerika A, Dolić SD, Jovanović DJ, Dramićanin M. Intra- and inter-configurational luminescence spectroscopy of Pr 3+ -doped YPO 4 nanophosphors. in Current Applied Physics. 2018;18(4):437-446.
doi:10.1016/j.cap.2018.01.012 .

Kahouadji, Badis, Guerbous, Lakhdar, Boukerika, Allaoua, Dolić, Slobodan D., Jovanović, Dragana J., Dramićanin, Miroslav, "Intra- and inter-configurational luminescence spectroscopy of Pr 3+ -doped YPO 4 nanophosphors" in Current Applied Physics, 18, no. 4 (2018):437-446,
https://doi.org/10.1016/j.cap.2018.01.012 . .

TY  - JOUR
AU  - Kahouadji, Badis
AU  - Guerbous, Lakhdar
AU  - Boukerika, Allaoua
AU  - Dolić, Slobodan D.
AU  - Jovanović, Dragana J.
AU  - Dramićanin, Miroslav
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1621
AB  - Pr3+-doped YPO4 nanophosphors prepared by simple sol gel method with different pH values (2, 4, 7 and 11) were obtained. The nanopowders samples were characterized by X-ray diffraction (XRD), room temperature steady and time resolved photoluminescence spectroscopy. The thorough study of pH influence on particles structure and luminescence of YPO4: 1 at. Pr3+ is presented. It was found that the grain size of samples increases with increases in pH value and obtained particles crystallize in a tetragonal phase with xenotime structure. Under 4f5d excitation (230 nm), all emission spectra show the inter -configurational 4f(2)- GT 4f5d and under (3)P2 excitation (449 nm), only the intra-configurational D-1(2)- GT H-3(4) red emission transition between 580 nm and 620 nm are observed. The highest luminescent intensity was obtained for samples prepared at pH = 4. Furthermore, it was found that the pH of solution has no effect of D-1(2) lifetime. (C) 2017 Elsevier B.V. All rights reserved.
T2  - Optical Materials
T1  - Sol gel synthesis and pH effect on the luminescent and structural properties of YPO4: Pr3+ nanophosphors
VL  - 70
SP  - 138
EP  - 143
DO  - 10.1016/j.optmat.2017.05.027
ER  - 

@article{
author = "Kahouadji, Badis and Guerbous, Lakhdar and Boukerika, Allaoua and Dolić, Slobodan D. and Jovanović, Dragana J. and Dramićanin, Miroslav",
year = "2017",
abstract = "Pr3+-doped YPO4 nanophosphors prepared by simple sol gel method with different pH values (2, 4, 7 and 11) were obtained. The nanopowders samples were characterized by X-ray diffraction (XRD), room temperature steady and time resolved photoluminescence spectroscopy. The thorough study of pH influence on particles structure and luminescence of YPO4: 1 at. Pr3+ is presented. It was found that the grain size of samples increases with increases in pH value and obtained particles crystallize in a tetragonal phase with xenotime structure. Under 4f5d excitation (230 nm), all emission spectra show the inter -configurational 4f(2)- GT 4f5d and under (3)P2 excitation (449 nm), only the intra-configurational D-1(2)- GT H-3(4) red emission transition between 580 nm and 620 nm are observed. The highest luminescent intensity was obtained for samples prepared at pH = 4. Furthermore, it was found that the pH of solution has no effect of D-1(2) lifetime. (C) 2017 Elsevier B.V. All rights reserved.",
journal = "Optical Materials",
title = "Sol gel synthesis and pH effect on the luminescent and structural properties of YPO4: Pr3+ nanophosphors",
volume = "70",
pages = "138-143",
doi = "10.1016/j.optmat.2017.05.027"
}

Kahouadji, B., Guerbous, L., Boukerika, A., Dolić, S. D., Jovanović, D. J.,& Dramićanin, M.. (2017). Sol gel synthesis and pH effect on the luminescent and structural properties of YPO4: Pr3+ nanophosphors. in Optical Materials, 70, 138-143.
https://doi.org/10.1016/j.optmat.2017.05.027

Kahouadji B, Guerbous L, Boukerika A, Dolić SD, Jovanović DJ, Dramićanin M. Sol gel synthesis and pH effect on the luminescent and structural properties of YPO4: Pr3+ nanophosphors. in Optical Materials. 2017;70:138-143.
doi:10.1016/j.optmat.2017.05.027 .

Kahouadji, Badis, Guerbous, Lakhdar, Boukerika, Allaoua, Dolić, Slobodan D., Jovanović, Dragana J., Dramićanin, Miroslav, "Sol gel synthesis and pH effect on the luminescent and structural properties of YPO4: Pr3+ nanophosphors" in Optical Materials, 70 (2017):138-143,
https://doi.org/10.1016/j.optmat.2017.05.027 . .