摘要
用红外透射谱和喇曼散射谱研究了退火对 Cd1 - x Znx Te晶片中 Te沉淀的影响 .研究结果表明 ,红外透射谱只对大尺寸的 Te沉淀较为敏感 ,而喇曼散射谱却能够探测到样品中小尺寸的 Te沉淀 ,两者互为补充 .在 Cd气氛下对晶片进行退火处理 ,选择合适的退火温度和退火时间 ,可以有效地消除晶片中大尺寸的 Te沉淀 ,却难以消除晶片中小尺寸的微量
The effect o f Cd-annealing on Cd 1-x Zn x Te alloys is studied by using IR transmission and micro-Raman spectroscopy.It shows that the IR transmittance is sensitive to the large size Te precipitates,while the Raman scattering can dete ct the small size Te precipitates.Via Cd-annealing,the large size Te precipita tes can significantly reduced under appropriate conditions,but it is quite diffi cult to eliminate the small size Te precipitates in the wafers.
基金
国家自然科学基金资助项目 (批准号 :6942 5 0 0 2 )
