Crystal growth and characterization of gallium oxynitride nanowires grown on seed crystals

Masubuchi, Yuji; Yamaoka, Ryohei; Motohashi, Teruki et al.

Journal of Crystal Growth, 2011, 337(1), 87-92

Permalink : https://hdl.handle.net/2115/48131

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アクセス権
open access
URI
https://hdl.handle.net/2115/48131
タイトル
Crystal growth and characterization of gallium oxynitride nanowires grown on seed crystals
著者
Masubuchi, Yuji ; Yamaoka, Ryohei ; Motohashi, Teruki ; Kirihara, Kazuhiko ; Lee, Woong ; Watanabe, Kentaro ; Sekiguchi, Takashi ; Kikkawa, Shinichi
e-Rad_Researcher
80466440
著者名
Masubuchi, Yuji
著者名
Yamaoka, Ryohei
著者名
Motohashi, Teruki
著者名
Kirihara, Kazuhiko
著者名
Lee, Woong
著者名
Watanabe, Kentaro
著者名
Sekiguchi, Takashi
著者名
Kikkawa, Shinichi
言語
英語
キーワード
Growth from vapor
Seed crystals
Gallium compounds
Nanomaterials
Oxynitride
発行日
2011-12-15
出版者
Elsevier B.V.
収録物名
Journal of Crystal Growth
巻(号)
337(1)
ページ
87-92
抄録
Nanowires of gallium oxynitride with wurtzite type structure were grown using seed crystals obtained by ammonia nitridation of an amorphous gallium oxide precursor containing 3 at% nickel additive. The seed crystals on a silica substrate were annealed with the amorphous gallium oxide precursor under ammonia flow to grow gallium oxynitride nanowires. The nanowires grew to lengths of about 150 μm along the seed crystals parallel to the hexagonal c-plane at 750 and 800℃ but they did not grow in the lateral direction. When the growth temperature was increased above 900℃, the growth direction gradually changed to become parallel with the c-axis with a copresenting of gallium-nitride-like crystals. Room-temperature cathodoluminescence spectra of nanowires grown at 800℃ exhibited strong blue emission at 2.69 eV along with weak band-edge emission at 3.39 eV, similar to GaN. The latter emission was intense for nanowires grown at 1000℃, which had an improved crystallinity and a higher nitride/oxide ion ratio. Nanowires grown at 750 and 900℃ exhibited persistent photoconductivity under UV irradiation at 393 nm.
資源タイプ
学術雑誌論文
出版タイプ
Accepted Manuscript
PISSN
0022-0248
関連情報 (isVersionOf)
出版社版DOI
https://doi.org/10.1016/j.jcrysgro.2011.10.008