M. Nedelcu, M. Sima, T. Vişan, T. Pascu, I. Franga, F. Craciunoiu
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引用次数: 9
Abstract
A method to produce composition modulated Bi/sub 2-x/Sb/sub x/Te/sub 3/ alloys by electrodeposition has been developed. The electrolyte, which consists in a HCl 6M (pH = 0) aqueous solution, allows the codeposition of bismuth, antimony and tellurium to be accomplished at room temperature on glassy carbon, platinum or nickel electrode. The composition of the films, their crystal structures and morphology were studied as function of electrochemical parameters and bath composition. It is shown that the electrodeposits are monophasic and exhibit a polycrystalline state. The electrical resistivity was of the order of 7-10 m/spl Omega/cm, whereas the electrodeposition rate value was 30-50 /spl mu/m/h for the films with good thermoelectric properties.
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