Electronic structure and optical properties of the scintillation material wurtzite ZnS(Ag)

被引：0

作者：

DongYang Jiang ^{[1
]}

Zheng Zhang ^{[1
]}

RuiXue Liang ^{[2
]}

ZhiHong Zhang ^{[1
]}

Yang Li ^{[1
]}

Qiang Zhao ^{[1
]}

XiaoPing Ouyang ^{[1
,3
,4
]}

机构：

[1] Beijing Key Laboratory of Passive Safety Technology for Nuclear Energy, School of Nuclear Science and Engineering,North China Electric Power University

[2] School of Electrical and Electronic Engineering, North China Electric Power University

[3] Northwest Institute of Nuclear Technology

[4] School of Materials Science and Engineering, Xiangtan University

来源：

Nuclear Science and Techniques | 2017年 / 28卷 / 03期

关键词：

Wurtzite ZnS; Electronic structure; Optical properties; First-principle;

D O I：

暂无

中图分类号：

TL812 [闪烁探测技术和仪器];

学科分类号：

082704 ;

摘要：

In order to investigate the effect of Ag doping(ZnS（Ag）) and Zn vacancy(VZn) on the alpha particle detection performance of wurtzite（WZ） ZnS as a scintillation cell component, the electronic structure and optical properties of ZnS, ZnS（Ag）, and VZnwere studied by firstprinciple calculation based on the density functional theory. The results show that the band gaps of ZnS, ZnS（Ag）,and VZnare 2.17, 1.79, and 2.37 eV, respectively. Both ZnS（Ag） and VZnenhance the absorption and reflection of the low energy photons. A specific energy, about 2.9 eV,leading to decrease of detection efficiency is observed. The results indicate that Ag doping has a complex effect on the detection performance. It is beneficial to produce more visible light photons than pure WZ ZnS when exposed to the same amount of radiation, while the increase of the absorption to visible light photons weakens the detection performance. Zn vacancy has negative effect on the detection performance. If we want to improve the detection performance of WZ ZnS, Ag doping will be a good way,but we should reduce the absorption to visible light photons and control the number of Zn vacancy rigorously.

引用

页码：9 / 15

页数：7

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