Photoconductive CdS films by a chemical bath deposition process

Pavaskar, N. R. ; Menezes, C. A. ; Sinha, A. P. B. (1977) Photoconductive CdS films by a chemical bath deposition process Journal of the Electrochemical Society, 124 (5). pp. 743-748. ISSN 0013-4651

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A new technique for the preparation of CdS thin films by chemical bathdeposition is described. The CdS films prepared by this method have many ofthe advantages of those made by the spray deposition method, such as theease of coating large areas and simplicity of the process. The stoichiometry iseasy to maintain in both these methods. The films are formed on rotating substratesfrom a bath containing cadmium salt in a complex form. Electrical,photoconducting, and optical properties such as I-V characteristics, decayof photoconductivity, spectral response of photoconductivity, and optical absorptionwere studied. Addition of cations like Ag, Cu, In, and Zn to thedeposition bath makes the films amorphous. Such amorphous layers have adensity of state of the order of 1019−1020/cm3/eV near the Fermi level, asdetermined by photodecay and field effect measurements. The films producedare strong, adhering tightly to the substrates, show little or no degradation,and are photosensitive as deposited.

Item Type:Article
Source:Copyright of this article belongs to The Electrochemical Society.
Keywords:II-VI Semiconductors; Semiconductor Thin Films; Liquid Phase Deposition; Solid Structure; Stoichiometry; Adhesion; Electrical Resistivity; Photoconductivity; Energy Gap; Visible Spectra
ID Code:48905
Deposited On:18 Jul 2011 09:52
Last Modified:18 Jul 2011 09:52

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