半导体学报2009，Vol.30Issue(11)：10-13,4.DOI:10.1088/1674-4926/30/11/112003
Effects of Sn-doping on morphology and optical properties of CdTe polycrystalline films
Effects of Sn-doping on morphology and optical properties of CdTe polycrystalline films
摘要
Abstract
Sn-doped CdTe polycrystalline films were successfully deposited on ITO glass substrates by close space sublimation. The effects of Sn-doping on the microstructure, surface morphology, and optical properties of polycrystalline films were studied using X-ray diffraction, scanning electron microscopy, and ultraviolet-visible spectrophotometry, respectively. The results show that the lower molar ratio of Sn and CdTe conduces to a strongly preferential orientation of (111) in films and a larger grain size, which indicates that the crystallinity of films can be improved by appropriate Sn-doping. As the molar ratio of Sn and CdTe increases, the preferential orientation of (111) in films becomes weaker, the grain size becomes smaller, and the crystal boundary becomes indistinct, which indicates that the crystallization growth of films is incomplete. However, as the Sn content increases, optical absorption becomes stronger in the visible region. In summary, a strongly preferential orientation of (111) in films and a larger grain size can be obtained by appropriate Sn-doping (molar ratio of Sn : CdTe = 0.06 : 1), while the film retains a relatively high optical absorption in the visible region. However, Sn-doping has no obvious influence on the energy gap of CdTe films.关键词
CdTe polycrystalline films/ Sn-doping/ preferential orientation growth/ morphology/ optical properties/ close space sublimationKey words
CdTe polycrystalline films/ Sn-doping/ preferential orientation growth/ morphology/ optical properties/ close space sublimation分类
数理科学引用本文复制引用
Li Jin,Yang Linyu,Jian Jikang,Zou Hua,Sun Yanfei..Effects of Sn-doping on morphology and optical properties of CdTe polycrystalline films[J].半导体学报,2009,30(11):10-13,4.基金项目
Project supported by the Important Project of College Scientific Research Projects of Xinjiang Uygur Autonomous Region (No. XJEDU2008105) and the Young Teacher Scientific Research Initial Fund of Xinjiang University (No. QN070106). （No. XJEDU2008105）
