کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1495503 992937 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Stokes and anti-Stokes luminescence from Eu/Yb:BaB4O7 nanocrystals
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Stokes and anti-Stokes luminescence from Eu/Yb:BaB4O7 nanocrystals
چکیده انگلیسی

The spectroscopic and structural properties of surface crystallized Eu3+ ions and Yb3+ ions co-doped oxyfluoroborate glass ceramics have been studied. Luminescence measurements reveal higher cross-sections in the ceramic, on excitation with 464 nm and 976 nm laser radiations. Studies with polarized light as well as SEM images confirm crystallization in the ceramic and the XRD studies show that α-BaB4O7 crystals are formed on the surface after annealing. These structural changes significantly alter the luminescence characteristics of Eu3+ and Yb3+ ions. A bright red emission from Eu3+ ions is observed under 976 nm excitation. The photophysics involved in this emission has been explained.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optical Materials - Volume 32, Issue 9, July 2010, Pages 913–919
نویسندگان
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