کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5400476 | 1505917 | 2013 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Enhanced green upconversion luminescence in Ho3+ and Yb3+ codoped Y2O3 ceramics with Gd3+ ions
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
A detailed investigation on the effect of Gd3+ ions on the upconversion (UC) luminescence of Y2O3:Ho3+/Yb3+ was performed. The green UC emission intensity was obviously enhanced along with an increase in the relative content of Gd3+ ions from 0Â mol% to 70Â mol%, with a corresponding decrease in the Y3+ content from 91.9Â mol% to 21.9Â mol%. X-ray diffraction and decay time investigations confirmed that tridoping with Gd3+ ions can influence the local crystal field of the Y2O3 host lattice. Theoretical calculations illustrated that the enhancement in the green UC emission resulted from the induction of the Gd3+ ions, which increased the lifetimes in the intermediate 2F5/2 (Yb) and 5I6 (Ho) states, reduced the highest phonon cutoff energy of Y2O3 and dissociated the Yb3+ and Ho3+ ion clusters in the bulk ceramics.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 143, November 2013, Pages 388-392
Journal: Journal of Luminescence - Volume 143, November 2013, Pages 388-392
نویسندگان
Ying Yu, Dawei Qi, Hua Zhao,