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Preparation of CdS thin films by electrodeposition: effect of colloidal sulfur particle stability on film composition

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Abstract

CdS thin films of about 1 μm thickness were deposited from an aqueous solution containing Cd2+, Na2S2O3 and gelatin as the protective colloid to stabilize the size of colloidal sulfur at from 30 to 40 nm and keep the concentration to an appropriate value during electrolysis. The effects of concentrations of Cd2+ and S2O3 2− ions and the deposition potential on the composition of CdS films were studied. The reaction mechanism of CdS film formation on the electrode is discussed. CdS film, whose composition is uniform across the film and which does not contain excess metallic cadmium, can be deposited from a solution containing 0.50 to 2.00 mM Cd(NO3)2, 1.00 to 5.00 mM Na2S2O3 and 1.0 × 10−7 to 1.0 × 10−3 wt % gelatin.

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Authors and Affiliations

  1. Department of Industrial Chemistry, Chubu University, Matsumoto-cho 1200, Kasugai, Aichi, 487-8501, Japan

    M. Takahashi, S. Hasegawa & M. Watanabe

  2. Department of Applied Chemistry, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi, 466-8555, Japan

    T. Miyuki & S. Ikeda

  3. Nagoya Municipal Industrial Research Institute, 4-41 Rokuban, 3-chome, Atsuta-ku, Nagoya, Aichi 456, Japan

    K. Iida

Authors
  1. M. Takahashi
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  2. S. Hasegawa
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  3. M. Watanabe
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  4. T. Miyuki
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  5. S. Ikeda
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  6. K. Iida
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Correspondence to M. Takahashi.

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Takahashi, M., Hasegawa, S., Watanabe, M. et al. Preparation of CdS thin films by electrodeposition: effect of colloidal sulfur particle stability on film composition. Journal of Applied Electrochemistry 32, 359–367 (2002). https://doi.org/10.1023/A:1016325211708

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  • DOI: https://doi.org/10.1023/A:1016325211708

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