کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5399876 | 1505909 | 2014 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
On the role of the network modifier PbO in Sm3+-doped borate glasses
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
A series of Sm3+-doped lead borate glasses with a lead oxide (PbO) content varying from 20Â mol% to 80Â mol% and a samarium oxide (Sm2O3) content of 1Â mol% is investigated. In addition to the network changes in the glass structure, the lead doping has a significant influence on the fluorescence properties of Sm3+ and on the tuneable intrinsic fluorescence of Pb2+ itself. The Pb2+ excitation band shifts monotonously to lower energies; its intensity is significantly reduced for a PbO content of 50Â mol% and more. For a concentration of 30Â mol%, the Pb2+ emission overlaps with the intense 6H5/2 to 6P5/2 Sm3+ excitation band enabling for radiative and non-radiative energy transfers. Lifetime measurements of excited Sm3+ show in all cases non-single exponential decay and were fitted by the Inokuti-Hirayama model indicating non-radiative dipole-dipole interaction between neighbouring Sm3+ ions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 151, July 2014, Pages 29-33
Journal: Journal of Luminescence - Volume 151, July 2014, Pages 29-33
نویسندگان
S. Krause, C. Pfau, M. Dyrba, P.-T. Miclea, S. Schweizer,