Defects in CdMnTe crystals for nuclear detector applications

被引:4
|
作者
Du, Yuanyuan [1 ]
Jie, Wanqi [1 ]
Xu, Yadong [1 ]
Zheng, Xin [1 ]
Wang, Tao [1 ]
Yu, Hui [1 ]
机构
[1] Northwestern Polytech Univ, Sch Mat Sci & Engn, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
基金
高等学校博士学科点专项科研基金;
关键词
CdMnTe; twin boundary; Te inclusions; dislocations; detector response;
D O I
10.1088/1674-4926/34/4/043003
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
A laser scanning confocal microscope (LSCM) and a field-emission scanning electron microscope (FESEM) were used to study the defects in CdMnTe crystals, such as twin boundaries, Te inclusions, and dislocations. Twin boundaries were usually decorated with Te inclusions, which could induce dislocations. The optical, electrical properties and detector performance of CdMnTe crystals with twins and free of twins were compared. The results showed that the wafers with a high density of twins usually had lower average IR transmittance and poorer crystalline quality. Besides, the energy spectra indicated that twin boundaries in a CdMnTe detector had a negative effect on detector performance; the values of both the energy resolution and (mu tau)(e) were nearly half of those for a single crystal detector.
引用
收藏
页数:5
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