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

doi:10.1007/s11664-016-4386-8

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

School of Advanced Science and Engineering

Research output: Contribution to journal › Article › peer-review

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 language	English
Pages (from-to)	2127-2132
Number of pages	6
Journal	Journal of Electronic Materials
Volume	45
Issue number	4
DOIs	https://doi.org/10.1007/s11664-016-4386-8
Publication status	Published - 2016 Apr 1

Keywords

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

ASJC Scopus subject areas

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

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Nakasu, T., Kizu, T., Yamashita, S., Aiba, T., Hattori, S., Sun, W. C., 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, 45(4), 2127-2132. https://doi.org/10.1007/s11664-016-4386-8

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 › peer-review

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, 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 - Sun, Wei Che

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