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Electrodeposition and characterization of CdSe semiconductor thin films

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Abstract

The electrodeposition of cadmium selenide alloy on glassy carbon and gold electrodes has been studied by electrochemical techniques. Potentiostatic I-t transients were recorded to obtain the nucleation mechanism, while cyclic voltammetry was used to characterize the system. Structural information on the electrodeposited layers was obtained by X-ray diffraction. The experimental results clearly show that the deposition of cadmium selenide alloy on glassy carbon and gold electrodes is a diffusion-controlled process. The nucleation is progressive, and the number of nucleation sites decreases with increasing bath temperature. The deposition of CdSe alloy results in well-defined crystals with hexagonal shape. The films were characterized by optical absorption and electrical resistivity measurements. Films showed a direct band gap of 3.56 eV.

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Authors and Affiliations

  1. Chemistry Department, Faculty of Science, Suez Canal University, Ismailia, Egypt

    S. M. Rashwan & M. M. Mohamed

  2. Chemistry Department, Faculty of Science, Ain Shams University, Cairo, Egypt

    S. M. Abd El-Wahab

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  1. S. M. Rashwan
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  2. S. M. Abd El-Wahab
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  3. M. M. Mohamed
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Correspondence to S. M. Rashwan.

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Rashwan, S.M., Abd El-Wahab, S.M. & Mohamed, M.M. Electrodeposition and characterization of CdSe semiconductor thin films. J Mater Sci: Mater Electron 18, 575–585 (2007). https://doi.org/10.1007/s10854-007-9141-8

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  • DOI: https://doi.org/10.1007/s10854-007-9141-8

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