Effect of pH on the Electrodeposition of ZnTe Film from a Citric Acid Solution

Takahiro Ishizaki*, Takeshi Ohtomo, Yusuke Sakamoto, Akio Fuwa

*この研究の対応する著者

    研究成果: Article査読

    20 被引用数 (Scopus)

    抄録

    Potentiostatic cathodic electrodeposition of ZnTe was investigated from the viewpoint of the effect of pH on the deposits' composition and crystallinity using citric acidic electrolytic baths, in which Zn(II) and Te(IV) species were dissolved to form ZnH 2Cit +, ZnHCit, ZnCit -, Zn(Cit) 2 4- and HTeO 2 +, HTeO 3 -, respectively (Cit: citrate) at various pH. The complex equilibrium calculation was carried out to examine the most predominant complex ion for Zn-Cit system at different pH. Deposition of three kinds of deposits, i.e., polycrystalline ZnTe with closely stoichiometric composition, crystalline Te, and the mixed crystal due to Te and ZnTe, can be controlled by changing the pH and [Zn(II)]/[Te(IV)] concentration ratio of the baths. All the deposits obtained at pH 4.0 were well crystallized with a ZnTe cubic preferential orientation along the (111) plane without any post-treatment. The difference of the electrodeposition behavior at various pH was also discussed.

    本文言語English
    ページ(範囲)277-280
    ページ数4
    ジャーナルMaterials Transactions
    45
    2
    出版ステータスPublished - 2004 2月

    ASJC Scopus subject areas

    • 材料科学(全般)
    • 金属および合金

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