Physical properties of ZnS thin films prepared by chemical bath deposition

被引:29
|
作者
Ben Nasr, T. [1 ]
Kamoun, N. [1 ]
Guasch, C. [2 ]
机构
[1] Fac Sci Tunis 2092, Phys Mat Condensee Lab, El Manar, Tunisia
[2] Univ Montpellier 2, Inst Elect Sud, UMR 5214, F-34095 Montpellier, France
关键词
zinc sulphide; chemical bath deposition; physical properties;
D O I
10.1016/j.apsusc.2008.01.173
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Zinc sulphide thin films are deposited on SnO2/glass using the chemical bath deposition technique. X-ray diffraction and atomic force microscopy are used to characterize the structure of the films; the surface composition of the films is studied by Auger electrons spectroscopy, the work function and the photovoltage are investigated by the Kelvin method. Using these techniques, we specify the effect of pH solution and heat treatment in vacuum at 500 degrees C. The cubic structure corresponding to the (1 1 1) planes of beta-ZnS is obtained for pH equal to 10. The work function (Phi(material) - Phi(probe)) for ZnS deposited at pH 10 is equal to -152 meV. Annealing at 500 degrees C increases Phi(m) (by about 43 meV) and induces the formation of a negative surface barrier. In all cases, Auger spectra indicate that the surface composition of zinc sulphide thin films exhibits the presence of the constituent elements Zn and S as well as C and O as impurity elements. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码:5039 / 5043
页数:5
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