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Proceedings Paper

Temperature dependence of photoconductivity for amorphous HgCdTe films
Author(s): Gong-Rong Deng; Yan-Li Shi; Lian-Jie Yu; Ji-Sheng Zhuang; Man-Ze Peng; Xiong-Jun Li; Li-Li Yang; Fan Li; Guang-Hua Wang
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Paper Abstract

To provide a better material than MCT for photoelectronic devices, amorphous Hg1-xCdxTe (a-MCT) as a new material is studied. Cr/Au alloy was deposited as both upper and bottom electrodes. a-MCT (x=0.2) films were grown on bottom electrodes, being sandwich device structure. The relation between photoconductivity and temperature was studied for the prototype devices under dark background and illuminated condition, respectively. The SR20 blackbody is used as infrared radiation source. The photoconductivity is obtained by DC and AC measurements within temperature range from 77K to 300K. There are different photoconductivity characteristic in three independent temperature ranges, namely high temperature regimeI(240-300K), middle temperature regimeII (140-240K), and low temperature regimeIII (77-140K). It was shown that, T=240K is the turning point from σph-T curves and is also maximal optical response temperature. In different regimes, the behavior of photoconductivity is due to carriers mobility and non-equilibrium carriers density.

Paper Details

Date Published: 6 August 2009
PDF: 8 pages
Proc. SPIE 7383, International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Infrared Imaging and Applications, 73833P (6 August 2009); doi: 10.1117/12.836564
Show Author Affiliations
Gong-Rong Deng, Kunming Institute of Physics (China)
Yan-Li Shi, Kunming Institute of Physics (China)
Lian-Jie Yu, Kunming Institute of Physics (China)
Ji-Sheng Zhuang, Kunming Institute of Physics (China)
Man-Ze Peng, Kunming Institute of Physics (China)
Xiong-Jun Li, Kunming Institute of Physics (China)
Li-Li Yang, Kunming Institute of Physics (China)
Fan Li, Kunming Institute of Physics (China)
Guang-Hua Wang, Kunming Institute of Physics (China)


Published in SPIE Proceedings Vol. 7383:
International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Infrared Imaging and Applications
Jeffery Puschell; Hai-mei Gong; Yi Cai; Jin Lu; Jin-dong Fei, Editor(s)

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