کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5402887 1392744 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Probing of inversion symmetry site in Eu3+-doped GdPO4 by luminescence study: Concentration and annealing effect
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Probing of inversion symmetry site in Eu3+-doped GdPO4 by luminescence study: Concentration and annealing effect
چکیده انگلیسی
Eu3+-doped gadolinium orthophosphate (GdPO4) (Eu3+ at%=0, 2, 5, 7, 10, 15, 20 and 30) nanoparticles have been prepared by ethylene glycol route and subsequently heated at 500 and 900 °C. The crystallite size increases with increasing heat-treatment temperature. Luminescence study shows that magnetic dipole transition (5D0→7F1) is prominent over the electric dipole transition (5D0→7F2), which has been attributed to occupancy of inversion symmetry site by more Eu3+ ions in Eu3+-doped GdPO4. The luminescence intensity is enhanced as heat-treatment temperature increases from 500 to 900 °C due to the improved crystallinity. Optimum luminescence is observed for 5-7 at% Eu3+ in GdPO4 nanoparticles. Above this concentration, luminescence intensity decreases due to concentration quenching effect. This is supported by lifetime study.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 130, Issue 1, January 2010, Pages 174-180
نویسندگان
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