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International Journal of Photoenergy
Volume 2011 (2011), Article ID 969214, 5 pages
http://dx.doi.org/10.1155/2011/969214
Research Article

Preparation and Characterization of Coevaporated Alloy Thin Films

College of Materials Science and Engineering, Sichuan University, Chengdu 610064, China

Received 30 April 2011; Accepted 30 August 2011

Academic Editor: Leonardo Palmisano

Copyright © 2011 Wei Li et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

thin films have been prepared by the vacuum coevaporation method. The structural, compositional, and optical properties of thin films have been investigated using X-ray diffraction, X-ray fluorescence, and optical transmittance spectra. As-deposited thin films are polycrystalline and show the cubic structure for and hexagonal one for with the highly preferential orientation. The composition of thin films determined from Vegard's law and quartz thickness monitors agrees with that determined from the X-ray fluorescence spectra. Optical absorption edge of optical transmittance for thin films shows a blue shift with the increase of the zinc content. The band gap for thin films can be tuned nonlinearly with from about 2.38 eV for CdS to 3.74 eV for ZnS. A novel structure for CuInS2-based solar cells with a layer is proposed in this paper.