Abstract
The cathodic electrodeposition of ZnTe film was studied using an aqueous citric acid bath (pH 4; temperature 368 K) in which Zn(II) and Te(IV) species were dissolved to form and ions, respectively. The deposition mechanism was studied based on cyclic voltammetry. The influence of the deposition potential on the morphology, composition, and structure of the deposited film was also investigated. A smooth, dense polycrystalline ZnTe film with nearly stoichiometric composition was deposited at a constant cathode potential, ranging from −0.80 to −0.60 V vs. Ag/AgCl, from a solution containing 20 mmol dm−3 Zn(II), 0.16 mmol dm−3 Te(IV), 0.25 mol dm−3 and 0.25 mol dm−3 Potentials in this range provided the deposited ZnTe film with high current efficiency (above 98%). During electrodeposition of the nearly stoichiometric crystalline ZnTe, the current density was approximately stationary. © 2004 The Electrochemical Society. All rights reserved.
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