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Thin films of ZnTe electrodeposited on stainless steel

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Abstract

The electrodeposition of zinc telluride (ZnTe) thin films on stainless steel foil substrates from an aqueous solution containing ZnSO4 (150 mM) and TeO2 (0.5 mM) is performed. For the deposition of stoichiometric films at a bath temperature 80 °C and pH=3.5, the suitable deposition potential is found to be in the range -740 mV to -800 mV against a Ag/AgCl reference electrode. The films structure, surface morphology, chemical composition, optical absorption coefficient, bandgap energy and electrical resistivity are measured and the results are discussed. Films are composed of small crystallites, and their surface texture, which depends on the film stoichiometry, varies with the deposition potential. Films have a resistivity greater than 109 Ω cm and a bandgap energy that is measured in the range 2.1 to 2.3 eV. Films annealed in nitrogen for 15 min and at 350 °C show p-type conductivity.

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Authors and Affiliations

  1. Faculty of Science, Physics Department, P.O. Box 5969, Safat, 13060, Kuwait

    A.E. Rakhshani & B. Pradeep

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  1. A.E. Rakhshani
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  2. B. Pradeep
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Correspondence to A.E. Rakhshani.

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PACS

81.15.Pq; 78.66.Hf; 68.55.Jk; 73.61.Ga

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Rakhshani, A., Pradeep, B. Thin films of ZnTe electrodeposited on stainless steel. Appl. Phys. A 79, 2021–2025 (2004). https://doi.org/10.1007/s00339-003-2389-9

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  • DOI: https://doi.org/10.1007/s00339-003-2389-9

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