کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8147951 | 1524155 | 2018 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Intra- and inter-configurational luminescence spectroscopy of Pr3+ -doped YPO4 nanophosphors
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
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 300â¯Â°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 4f2 â 4f5d and intra-configurational 4f2â 4f2 emission-excitation transitions spectra are measured and investigated. Upon 4f2 â 4f5d excitation transition, all the samples present broad intense emission bands attributed to 4f5d â 4f2 emission transitions and peaks in red region assigned to 1D2â3H4 transition as photon cascade emission phenomena (PCE). The presence of only 1D2â3H4 transition is discussed. In addition, the 1D2 energy level lifetimes as well as the refractive indexes were determined and discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Current Applied Physics - Volume 18, Issue 4, April 2018, Pages 437-446
Journal: Current Applied Physics - Volume 18, Issue 4, April 2018, Pages 437-446
نویسندگان
B. Kahouadji, L. Guerbous, A. Boukerika, Slobodan D. DoliÄ, Dragana J. JovanoviÄ, Miroslav D. DramiÄanin,