Thermal annealing behavior of luminescence of Gd3+-doped PbWO4 single crystal in air atmosphere

被引：7
|
作者：
Huang, Y [1 ]
Feng, X [1 ]
Zhu, W [1 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
来源：
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2005年 / 80卷 / 02期
关键词：
D O I：
10.1007/s00339-003-2376-1
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The results of photoluminescence measurements on as-grown PbWO4 : Gd3+ show that Gd3+ acts as a sensitizer of luminescence in the PbWO4 lattice. Effects of sequential annealing in air atmosphere on luminescence of PbWO4 : Gd3+ were investigated by means of X-ray excited luminescence and photoluminescence. The annealing experiments indicate that the essence of the annealing in air atmosphere is the exchange of oxygen components between PbWO4 : Gd3+ crystal and the environment to improve the defects in the lattice. Annealing at a temperature of about 640 degreesC could further enhance the luminescence of PbWO4 and depress it at a higher temperature. However, PbWO4 : Y3+ and PbWO4 : La3+ crystals do not show any luminescence enhancement in the same annealing process. A tentative mechanism of luminescence enhancement due to annealing is suggested.
引用
收藏
页码：409 / 413
页数：5
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