采用不同浓度的Br2-MeOH作为抛光液对CdZnTe进行化学抛光,发现用2%Br2-MeOH腐蚀时速率平稳且易于控制,能有效去除表面划痕,获得光亮表面.AFM分析发现,抛光后表面粗糙度降低30%,平整度增加.XPS分析发现CdZnTe的(111)Cd极性面变成了富Te非极性表面.PL分析发现表面陷阱态密度降低,表面晶格的完整性增强.
参考文献
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