کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7840241 | 1505864 | 2018 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of GeO2 concentration on the absorption and fluorescence behaviors of Yb3+ in tellurite glasses
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effects of GeO2 concentration on the absorption and fluorescence behaviors of Yb3+ in tellurite glasses Effects of GeO2 concentration on the absorption and fluorescence behaviors of Yb3+ in tellurite glasses](/preview/png/7840241.png)
چکیده انگلیسی
Yb3+-doped tellurite glasses exhibited largest absorption and emission cross sections. However, it is more valuable to achieve larger Stark splitting of Yb3+ than improve the absorption and emission cross sections. In this work, we introduced a part of GeO2 into tellurite glass matrix to enlarge the Stark splitting of Yb3+. The effects of GeO2 concentration on the spectroscopic characteristic of Yb3+ were systematically investigated. The stimulated absorption and emission cross sections increased to be 1.62â¯pm2 and 0.88â¯pm2 when the GeO2 concentration up to 30â¯mol%, then decreased with the GeO2 concentration further increased. The Stark splitting of Yb3+ do not change until the GeO2 concentration up to 30â¯mol%. The NIR fluorescence lifetimes of Yb3+ drastically decreased from 850â¯Î¼s to 385â¯Î¼s with the GeO2 concentration increasing, which was due to the increasing multi-phonon relaxation rate and reabsorption. Intense NIR fluorescence were observed when excited by the ultraviolet light, which can be ascribed to the energy transfer from the CTB of Yb3+-O2- couple to Yb3+. The CTB showed a slight blue-shift from 338 to 313â¯nm with GeO2 concentration increasing, which was ascribed to the size of the cation site would increase.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 198, June 2018, Pages 364-369
Journal: Journal of Luminescence - Volume 198, June 2018, Pages 364-369
نویسندگان
Liaolin Zhang, Yu Xia, Xiao Shen, Wei Wei,