کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8002117 1516314 2013 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Cooperative downconversion and near-infrared luminescence of Tb3+/Yb3+ co-doped tellurite glass
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Cooperative downconversion and near-infrared luminescence of Tb3+/Yb3+ co-doped tellurite glass
چکیده انگلیسی
The different concentration of Tb3+/Yb3+ co-doped tellurite glasses were prepared by high-temperature melting-quenching method. The near-infrared (NIR) luminescence of co-doped samples upon the excitation of Tb3+ ions with a green visible photon at 484 nm was investigated, and two NIR photons could be emitted by Yb3+ (2F5/2 → 2F7/2) through cooperative energy transfer from Tb3+ to two Yb3+ ions. On the other hand, the Yb3+ co-doped concentration dependence on the visible and NIR emissions, decay lifetimes and quantum efficiencies from the downconversion have been studied. The NIR quantum efficiency achieved 172% before the concentration quenching threshold.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 579, 5 December 2013, Pages 27-30
نویسندگان
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