1. Tailoring the photoluminescence characteristics of p-type GaSb: The role of surface chemical passivation
- Author
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Wang, Bo, Wei, Zhipeng, Li, Mei, Liu, Guojun, Zou, Yonggang, Xing, Guozhong, Tan, Thiam Teck, Li, Sean, Chu, Xueying, Fang, Fang, Fang, Xuan, Li, Jinhua, Wang, Xiaohua, and Ma, Xiaohui
- Subjects
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GALLIUM antimonide , *OPTICAL properties , *PHOTOLUMINESCENCE , *SULFUR , *SURFACE chemistry , *TEMPERATURE effect - Abstract
Abstract: We report a systematic study on modulating optical properties in gallium antimonide (GaSb) with the sulfur surface passivation. Compared with the pristine sample, the intensity of the photoluminescence (PL) emission from the passivated GaSb was dramatically enhanced about 15 times at room temperature. The temperature-dependent surface states were further investigated via the low temperature PL spectroscopy. The bound-edge-related transition emission (BE4) at 795meV and the residual acceptor associated emission located at 777meV were identified clearly at 10K. The observed passivation effects on the photoluminescence characteristics evolution of GaSb are discussed in detail. [Copyright &y& Elsevier]
- Published
- 2013
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