Photo- and thermoluminescence of BaGa2S4:Eu2+ and BaGa2S4:Eu2+,Ce3+ crystals

被引：0
作者：
A. N. Georgobiani
B. G. Tagiev
S. A. Abushov
O. B. Tagiev
Zheng Xu
Suling Zhao
机构：
[1] Russian Academy of Sciences,Lebedev Institute of Physics
[2] Academy of Sciences of Azerbaijan,Institute of Physics
[3] Beijing Jiaotong University,Institute of Optoelectronic Technologies
来源：
Inorganic Materials | 2008年 / 44卷
关键词：
Glow Curve; BaGa; Thermally Stimulate Depolarization; Thiogallate; Thermoluminescence Data;
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学科分类号：
摘要：
Data are presented on the photo- and thermoluminescence of polycrystalline BaGa2S4:Eu2+ and BaGa2S4:Eu2+, Ce3+ at temperatures from 77 to 300 K. The broad photoluminescence band at 505 nm in BaGa2S4:Eu2+ is shown to be due to the 4f65d → 4f7 transition. The broad emission bands at 460 and 510 nm in BaGa2S4:Ce3+ arise from the 5D (2D3/2) → 4f2(2F5/2) and 5D (2D3/2) → 4f2(2F7/2) transitions. Codoping of BaGa2S4 with Eu2+ and Ce3+ increases the luminescence efficiency owing to energy transfer from Ce3+ to Eu2+. The thermoluminescence data were used to evaluate the energies of the traps involved: 0.26, 0.31, 0.42, 0.57, and 0.64 eV in BaGa2S4:Eu2+ and 0.28, 0.32, 0.54, 0.61, and 0.65 eV in BaGa2S4:Eu2+, Ce3+.
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页码：110 / 114
页数：4
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