Effect of annealing on structural and optical properties of lead tungstate microcrystals

被引：0
|
作者：
庞华锋 [1 ]
李志杰 [1 ]
向霞 [1 ,2 ]
章春来 [1 ]
傅永庆 [3 ]
祖小涛 [1 ,2 ]
机构：
[1] Department of Applied Physics,University of Electronic Science and Technology of China
[2] International Center for Material Physics,Chinese Academy of Sciences
[3] Thin Film Centre,Scottish Union of Physics Alliance,University of the West of Scotland
来源：
Chinese Physics B | 2011年 / 11期
基金：
中央高校基本科研业务费专项资金资助;
关键词：
PbWO4; microcrystal; annealing; defects; photoluminescence;
D O I：
暂无
中图分类号：
O482.3 [光学性质];
学科分类号：
070205 ; 0805 ; 080502 ; 0809 ;
摘要：
Shuttle-like lead tungstate(PbWO) microcrystals are synthesized at room temperature using the precipitation method with the cetyltrimethyl ammonium bromide.Results from both the X-ray diffraction and the scanning electron microscopy show that the lattice distortions of the PbWOmicrocrystals are reduced significantly when the annealing temperature is increased to 873 K.The result from the ultraviolet-visible diffuse reflectance spectroscopy shows that the exciton absorption appears in the sample annealed at 673 K.The self-trapped exciton luminescence due to the Jahn-Teller effect is also observed in the blue band.The interstitial oxygen ions in the WOgroups are mainly resposible for the enhancement effect of the green luminescence of the annealed samples.The above results are supported by the spectrum analysis of the as-grown and the post-annealed samples using the X-ray photoelectron spectroscopy.
引用
收藏
页码：397 / 403
页数：7
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