کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5399744 | 1505906 | 2014 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Upconversion luminescence in langatate ceramics doped with Tm3+ and Yb3+
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Ultraviolet (365Â nm, 1D2â3H6), blue (480Â nm, 1G4â3H6), red (650-660Â nm, 1G4â3F4+3F2,3â3H6), and infrared (800Â nm, 3H4â3H6) upconversion luminescence, were obtained for the first time in La3Ga5.5Ta0.5O14:Tm:Yb ceramic sample, synthesized by solid-state reaction, pumped at 973Â nm. Yb3+âTm3+ energy transfer processes accounting for population of the emitting levels of Tm3+ are discussed. Also, the back-transfer process Tm3+âYb3+ was observed. The decay curves of the metastable levels 1D2, 1G4, 3H4, and 3F4 of Tm3+ and 2F5/2 of Yb3+ were analyzed. The cross-relaxation microparameters of Tm3+ were found. The efficiency of the Yb3+âTm3+ transfer was estimated.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 154, October 2014, Pages 74-79
Journal: Journal of Luminescence - Volume 154, October 2014, Pages 74-79
نویسندگان
S. Georgescu, A.M. Voiculescu, C. Matei, A. Stefan, O. Toma, R. Birjega,