Negative photoconductivity of InAs nanowires

Literature Information

Publication Date 2015-11-17
DOI 10.1039/C5CP06139C
Impact Factor 3.676
Authors

Yuxiang Han, Xiao Zheng, Mengqi Fu, Dong Pan, Xing Li, Yao Guo, Jianhua Zhao, Qing Chen


View Original

Abstract

Negative photoconductivity is observed in InAs nanowires (NWs) without a surface defective layer. The negative photoconductivity is strongly dependent on the wavelength and intensity of the light, and is also sensitive to the environmental atmosphere. Two kinds of mechanisms are discerned to work together. One is related to gas adsorption, which is photodesorption of water molecules and photo-assisted chemisorption of O2 molecules. The other one can be attributed to the photogating effect introduced by the native oxide layer outside the NWs.

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Physical Chemistry Chemical Physics
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