Surface Texture and Crystallinity Variation of ZnTe Epilayers Grown on the Step-Terrace Structure of the Sapphire Substrate

Taizo Nakasu, Takeru Kizu, Sotaro Yamashita, Takayuki Aiba, Shota Hattori, Wei Che Sun, Kosuke Taguri, Fukino Kazami, Yuki Hashimoto, Shun Ozaki, Masakazu Kobayashi, Toshiaki Asahi

    Research output: Contribution to journal › Article

    6 Citations (Scopus)

    Abstract

    ZnTe/sapphire heterostructures were focused, and ZnTe thin films were prepared on highly mismatched sapphire substrates by molecular beam epitaxy. A sapphire substrate possessing an atomically-smooth step-terrace structure was used to improve the crystallinity and morphology of the produced ZnTe film. The growth mode of the ZnTe thin film on a sapphire substrate with an atomically-smooth step-terrace structure was found to shift to a two-dimensional growth mode, and a ZnTe thin film possessing a flat surface was obtained. The crystallographic properties of the ZnTe film suggested that the resulting layer consisted of a single (111)-oriented domain. The photoluminescence property was also improved, and the interface lattice alignment between the ZnTe and sapphire was also affected by the atomically-smooth step-terrace structure.

    Original languageEnglish
    Pages (from-to)2127-2132
    Number of pages6
    JournalJournal of Electronic Materials
    Volume45
    Issue number4
    DOIs
    Publication statusPublished - 2016 Apr 1

    Fingerprint

    Aluminum Oxide
    Epilayers
    Sapphire
    crystallinity
    sapphire
    textures
    Textures
    Substrates
    Thin films
    thin films
    Molecular beam epitaxy
    Heterojunctions
    flat surfaces
    Photoluminescence
    molecular beam epitaxy
    alignment
    photoluminescence
    shift

    Keywords

    • molecular beam epitaxy
    • Sapphire
    • step-terrace structure
    • x-ray diffraction
    • zinc telluride

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering
    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Materials Chemistry

    Cite this

    Surface Texture and Crystallinity Variation of ZnTe Epilayers Grown on the Step-Terrace Structure of the Sapphire Substrate. / Nakasu, Taizo; Kizu, Takeru; Yamashita, Sotaro; Aiba, Takayuki; Hattori, Shota; Sun, Wei Che; Taguri, Kosuke; Kazami, Fukino; Hashimoto, Yuki; Ozaki, Shun; Kobayashi, Masakazu; Asahi, Toshiaki.

    In: Journal of Electronic Materials, Vol. 45, No. 4, 01.04.2016, p. 2127-2132.

    Research output: Contribution to journal › Article

    Nakasu, T, Kizu, T, Yamashita, S, Aiba, T, Hattori, S, Sun, WC, Taguri, K, Kazami, F, Hashimoto, Y, Ozaki, S, Kobayashi, M & Asahi, T 2016, 'Surface Texture and Crystallinity Variation of ZnTe Epilayers Grown on the Step-Terrace Structure of the Sapphire Substrate', Journal of Electronic Materials, vol. 45, no. 4, pp. 2127-2132. https://doi.org/10.1007/s11664-016-4386-8
    Nakasu T, Kizu T, Yamashita S, Aiba T, Hattori S, Sun WC et al. Surface Texture and Crystallinity Variation of ZnTe Epilayers Grown on the Step-Terrace Structure of the Sapphire Substrate. Journal of Electronic Materials. 2016 Apr 1;45(4):2127-2132. https://doi.org/10.1007/s11664-016-4386-8
    Nakasu, Taizo ; Kizu, Takeru ; Yamashita, Sotaro ; Aiba, Takayuki ; Hattori, Shota ; Sun, Wei Che ; Taguri, Kosuke ; Kazami, Fukino ; Hashimoto, Yuki ; Ozaki, Shun ; Kobayashi, Masakazu ; Asahi, Toshiaki. / Surface Texture and Crystallinity Variation of ZnTe Epilayers Grown on the Step-Terrace Structure of the Sapphire Substrate. In: Journal of Electronic Materials. 2016 ; Vol. 45, No. 4. pp. 2127-2132.
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    abstract = "ZnTe/sapphire heterostructures were focused, and ZnTe thin films were prepared on highly mismatched sapphire substrates by molecular beam epitaxy. A sapphire substrate possessing an atomically-smooth step-terrace structure was used to improve the crystallinity and morphology of the produced ZnTe film. The growth mode of the ZnTe thin film on a sapphire substrate with an atomically-smooth step-terrace structure was found to shift to a two-dimensional growth mode, and a ZnTe thin film possessing a flat surface was obtained. The crystallographic properties of the ZnTe film suggested that the resulting layer consisted of a single (111)-oriented domain. The photoluminescence property was also improved, and the interface lattice alignment between the ZnTe and sapphire was also affected by the atomically-smooth step-terrace structure.",
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    AU - Aiba, Takayuki

    AU - Hattori, Shota

    AU - Sun, Wei Che

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    AU - Kazami, Fukino

    AU - Hashimoto, Yuki

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    AU - Kobayashi, Masakazu

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