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
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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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 (5D0â7F1) is prominent over the electric dipole transition (5D0â7F2), 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
Journal: Journal of Luminescence - Volume 130, Issue 1, January 2010, Pages 174-180
نویسندگان
N. Yaiphaba, R.S. Ningthoujam, N. Shanta Singh, R.K. Vatsa, N. Rajmuhon Singh,