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Proceedings Paper

Different approximation for carrier statistic in non-parabolic MWIR HgCdTe photovoltaic devices
Author(s): Jun Wang; Xiaoshuang Chen; Weida Hu; Lin Wang; Yongguo Chen; Wei Lu; Faqiang Xu
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Paper Abstract

The current-voltage and photo-response characteristics of middle wavelength infrared (MWIR) HgCdTe photodiodes have been performed based on a self-consistent solution of the Poisson's equation, the electron/hole continuity equations, and three generation-recombination processes as Auger, Shockley-Read-Hall and optical generation recombination. Three different carrier density approximations, (1) parabolic conduction band approximation, (2) Bebb's non-parabolic expression, and (3) Harman's non-parabolic approximation, are proposed to simulate the I-V curve and photo-response of MWIR HgCdTe photovoltaic devices by considering the carrier degeneracy and the non-parabolic conduction band. It is found that omitting non-parabolic effect can lead to an enormous deviation in the simulation result, especially for heavily doped HgCdTe devices. Based on the calculated results of photo-response, the parabolic conduction band and Harman's non-parabolic approximation can lead to the response peak shift to short and long wavelength, respectively.

Paper Details

Date Published: 21 May 2011
PDF: 7 pages
Proc. SPIE 8012, Infrared Technology and Applications XXXVII, 80123B (21 May 2011); doi: 10.1117/12.886656
Show Author Affiliations
Jun Wang, National Synchrotron Radiation Lab. (China)
Shanghai Institute of Technical Physics (China)
Xiaoshuang Chen, Shanghai Institute of Technical Physics (China)
Weida Hu, Shanghai Institute of Technical Physics (China)
Lin Wang, Shanghai Institute of Technical Physics (China)
Yongguo Chen, Shanghai Institute of Technical Physics (China)
Wei Lu, Shanghai Institute of Technical Physics (China)
Faqiang Xu, National Synchrotron Radiation Lab. (China)


Published in SPIE Proceedings Vol. 8012:
Infrared Technology and Applications XXXVII
Bjørn F. Andresen; Gabor F. Fulop; Paul R. Norton, Editor(s)

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