کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5404284 | 1392775 | 2006 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermal stability and spectroscopic properties of Er3+-doped lead fluorogermanate glasses
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
The thermal characterization and spectroscopic properties of Er3+-doped 0.6GeO2-(0.4-x)PbO-xPbF2 glasses were investigated experimentally. With the replacement of PbO by PbF2 the thermal stability of glasses is improved and the infrared fluorescence intensity at 1530Â nm is increased. The Judd-Ofelt intensity parameters, radiative transition rates, and fluorescence lifetimes of the excited 4I13/2 level of Er3+ ions were calculated from Judd-Ofelt theory. The asymmetric ligand field around Er3+ ions resulted from the incorporation of PbF2 into germanate glasses, broadens the infrared emission spectra at 1530Â nm. Upconversion luminescence in the investigated glasses was observed at room temperature under the excitation of 976Â nm laser diode. The glass 0.6GeO2-0.3PbO-0.1PbF2 exhibits the maximum upconversion emission intensity, while no frequency upconversion luminescence was observed in the 0.6GeO2-0.4PbO glass. The quadratic dependence of the green and red emissions on excitation power indicates that two-photon absorption contributes to the visible emission under the 976-nm excitation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 121, Issue 1, November 2006, Pages 149-158
Journal: Journal of Luminescence - Volume 121, Issue 1, November 2006, Pages 149-158
نویسندگان
Zhongmin Yang, Zhonghong Jiang,