کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5404164 | 1505932 | 2006 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Dynamical processes of Ln3+ ions doped in LaF3 nanocrystals embedded in transparent oxyfluoride glass
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
The transverse and longitudinal relaxations from the excited electronic levels of rare earth ions (Ln3+) in nanocrystals are reviewed. Employing the frequency up-converted emission, we have studied the ion-ion interactions and the distribution of the ions within Pr3+:LaF3 nanocrystals embedded in oxyfluoride glass. The phonon-assisted energy transfer between Pr3+ ions is discussed and the relation between the energy transfer rate and the buildup of the up-converted emission is established. The results suggest that the Pr3+ concentration inside the nanocrystals is 5-10 times that of the average concentration. A jump in the energy transfer rate is observed as the concentration increases, and the possible processes behind it are discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volumes 119â120, JulyâOctober 2006, Pages 153-160
Journal: Journal of Luminescence - Volumes 119â120, JulyâOctober 2006, Pages 153-160
نویسندگان
Hairong Zheng, Xiao-jun Wang, Shi-Xian Qu, M.J. Dejneka, Richard S. Meltzer,