Ning Xia, Xuan Fang, Tianyu Rong, Dengkui Wang, Dan Fang, Jilong Tang, Xinwei Wang, Xiaohua Wang, Yongfeng Li, Bin Yao, Zhipeng Wei. Effect of Surface Sulfur Passivation on Photoresponse Characteristics of GaAs Materials[J]. Chinese Journal of Lasers, 2018, 45(6): 0603002
- Chinese Journal of Lasers
- Vol. 45, Issue 6, 0603002 (2018)
Fig. 1. Schematic of different treatment processes of samples
Fig. 2. (a) PL spectra at room temperature of samples for different passivation time; (b) AFM diagram of GaAs samples without passivation; (c) AFM diagram of GaAs samples after passivation treatment for 25 min
Fig. 3. PL spectra of samples after passivation treatment for different standing time
Fig. 4. Photocurrent and dark current curves of three groups of samples
Fig. 5. Responsivity at 300-900 nm of samples. (a) Different samples; (b) sample 3 after 30 d
Fig. 6. Schematic of energy bands of GaAs samples. (a) Dark; (b) sample 1, under light; (c) sample 2, under light; (d) sample 3, under light
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