Paper Title:
Effect of Film Thickness on the Structural and Physical Properties of CdZnTe Thin Films
  Abstract

Different thickness of CdZnTe films were deposited onto glass substrates by RF magnetron sputtering from Cd0.9Zn0.1Te crystals target. Their structural characteristics were studied by X-ray diffraction (XRD). The XRD experiments showed that the films are polycrystalline and have a zinc-blende (cubic) structure. The crystallite size and micro-strain were calculated. It is observed that the crystallite size increases and micro-strain decreases with the film thickness. The optical measurements showed that the average transmittance of all the samples have is less than 50% in the visible range. The possible optical transition in these films is found to be allowed direct transition with energy gap increase from 1.53 to 1.75 eV. For the electrical properties, the sheet resistivity decreased from 2.582×108 to3.069×107 Ohm/sq when the thickness increased from 307 to 823 nm; while the carrier concentration seems to be less affected by the film thickness. This behaviour in electrical properties was explained by the crystallinity and the grain size evolution.

  Info
Periodical
Advanced Materials Research (Volumes 194-196)
Edited by
Jianmin Zeng, Taosen Li, Shaojian Ma, Zhengyi Jiang and Daoguo Yang
Pages
2312-2316
DOI
10.4028/www.scientific.net/AMR.194-196.2312
Citation
D. M. Zeng, W. Q. Jie, H. Zhou, Y. G. Yang, F. Chen, "Effect of Film Thickness on the Structural and Physical Properties of CdZnTe Thin Films", Advanced Materials Research, Vols. 194-196, pp. 2312-2316, 2011
Online since
February 2011
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$32.00
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