Abstract
The electrochemical reduction processes on stainless-steel substrates from an aqueous electrolyte composed of nitric acid, Bi 3+, HTeO 2 +, SbO + and H 2SeO 3 systems were investigated using cyclic voltammetry. The thin films with a stoichiometry of Bi 2Te 3, Bi 0.5Sb 1.5Te 3 and Bi 2Te 2.7Se 0.3 have been prepared by electrochemical deposition at selected potentials. The structure, composition, and morphology of the films were studied by X-ray diffraction (XRD), environmental scanning electron microscopy (ESEM) and electron microprobe analysis (EMPA). The results showed that the films were single phase with the rhombohedral Bi 2Te 3 structure. The morphology and growth orientation of the films were dependent on the deposition potentials.
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