Sulfur-induced exciton localization in Te-rich ZnSTe alloy
- Yang, XD
- Xu, ZY
- Sun, Z
- Ji, Y
- Sun, BQ
- Sou, IK
- Ge, WK
- Yang, XD, Chinese Acad Sci, Inst Semicond, State Key Lab Superlattices & Microstruct, POB 912, Beijing 100083, Peoples R China. 电子邮箱地址: zyxu@red.semi.ac.cn
DOIAbstract
Exciton localization in Te-rich ZnSTe epilayers has been studied by photoluminescence (PL) and time-resolved PL. The sulfur-related exciton emission is found to dominate the radiative recombination at low temperature and is shifted to the low energy with the increase of S concentration. By measuring the PL dependence on temperature and by analyzing the PL decay process, we have clarified the localization nature of the sulfur-related exciton emission. Furthermore, the difference of the localization effect in Te- and S-rich ZnSTe is also compared and discussed. © 2005 American Institute of Physics
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