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Hg1—xCdxTe材料中的Te离子空位共振能级

Keywords: 共振能级Hg1-xCdxTe材料Te离子空位显微荧光拉曼显微镜薄膜结构碲镉汞材料

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Abstract:

利用拉曼显微镜在室温下对金属有机化合物气相外延(MOVPE)和液相外延(LPE)方法生长的Hg1-xCdxTe薄膜材料以及用加速坩埚旋转布里奇曼(ACRT-Bridgman)和Te溶剂方法生长的Hg1-xCdxTe体材料进行了系统研究,在上述4种方法生长的材料的显微拉曼光谱中,均发现在导带底上方且远高于材料导带底对应能级的显微荧光发光峰,通过详细比较可以判定,高于导带底约1.5eV的显微荧光起源于Hg1-xCdxTe材料中的Te离子空位与材料导带底的共振能级发光,从而确定在碲镉汞材料中存在一个稳定的Te离子空位共振能级。

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