ZnO dense nanowire array on a film structure in a single crystal domain texture for optical and photoelectrochemical applications

Miao Zhong, Yukio Sato, Mario Kurniawan, Aleksandra Apostoluk, Bruno Masenelli, Etsuo Maeda, Yuichi Ikuhara, Jean Jacques Delaunay

    研究成果: Article査読

    26 被引用数 (Scopus)

    抄録

    A single crystal domain texture quality (a unique in-plane and out-of-plane crystalline orientation over a large area) ZnO nanostructure of a dense nanowire array on a thick film has been homogeneously synthesized on a-plane sapphire substrates over large areas through a one-step chemical vapor deposition (CVD) process. The growth mechanism is clarified: a single crystal [] oriented ZnAl2O4 buffer layer was formed at the ZnO film and the a-plane sapphire substrate interface via a diffusion reaction process during the CVD process, providing improved epitaxial conditions that enable the synthesis of the high crystalline quality ZnO nanowire array on a film structure. The high optoelectronic quality of the ZnO nanowire array on a film sample is evidenced by the free exitonic emissions in the low-temperature photoluminescence spectroscopy. A carrier density of ∼1017 cm-3 with an n-type conductivity of the ZnO nanowire array on a film sample is obtained by electrochemical impedance analysis. Finally, the ZnO nanowire array on a film sample is demonstrated to be an ideal template for a further synthesis of a single crystal quality ZnO-ZnGa2O4 core-shell nanowire array on a film structure. The fabricated ZnO-ZnGa2O4 sample revealed an enhanced anticorrosive ability and photoelectrochemical performance when used as a photoanode in a photoelectrochemical water splitting application.

    本文言語English
    論文番号495602
    ジャーナルNanotechnology
    23
    49
    DOI
    出版ステータスPublished - 2012 12 14

    ASJC Scopus subject areas

    • バイオエンジニアリング
    • 化学 (全般)
    • 材料科学(全般)
    • 材料力学
    • 機械工学
    • 電子工学および電気工学

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