Electrodeposition of ZnTe Film with High Current Efficiency at Low Overpotential from a Citric Acid Bath

Takahiro Ishizaki, Takeshi Ohtomo, Akio Fuwa

    研究成果: Article

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    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 Zn(Cit)2 4- and HTeO 2 + 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 H3Cit, and 0.25 mol dm-3 Na3Cit (Cit = C6H5O7). 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.

    元の言語English
    ジャーナルJournal of the Electrochemical Society
    151
    発行部数3
    DOI
    出版物ステータスPublished - 2004

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    ASJC Scopus subject areas

    • Electrochemistry
    • Surfaces, Coatings and Films
    • Surfaces and Interfaces

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