摘要
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 .
The MOVPE Hg1-xCdxTe epitaxial film, LPE Hg1-xCdxTe epitaxial film and Hg1-xCdxTe bulk wafers grown by ACRT-Bridgman and Te solvent methods were measured by means of Raman microscopy in the room temperature. In all the experimental specimen, the micro-Photoluminescence emission centered above the bottom of Hg1-xCdxTe conduction band about 1.5eV were observed for the first time. It is confirmed that the micro-photoluminescence was induced by the Te ion vacancy resonance level.
出处
《红外与毫米波学报》
SCIE
EI
CAS
CSCD
北大核心
2003年第1期27-30,共4页
Journal of Infrared and Millimeter Waves