Atomic layer deposition coating of ZnO shell for GaN-ZnO core-sheath heteronanowires

Kim, Hyoun Woo; Yang, Ju Chan; Na, Han Gil; Lee, Chongmu

doi:10.1016/j.apsusc.2011.06.022

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Atomic layer deposition coating of ZnO shell for GaN-ZnO core-sheath heteronanowires

Kim, Hyoun Woo;
Yang, Ju Chan;
Na, Han Gil;
Lee, Chongmu

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7

초록

We have synthesized GaN-core/ZnO-shell nanowires and investigated effects of the ZnO coating. The Xray diffraction pattern showed that as-synthesized samples are composed of GaN and ZnO. Transmission electron microscopy indicated that the deposited ZnO shell layer is poly-crystalline. The photoluminescence (PL) spectrum of GaN has been changed by the ZnO coating, where emission bands centered at roughly 1.9 eV, 2.5 eV, and 3.3 eV were newly added to the emissions from core GaN nanowires. We found that overall PL intensity has been significantly increased by coating the ZnO shell layers.

키워드

Nanostructures; Chemical synthesis; Transmission electron microscopy; ACCEPTOR PAIR RECOMBINATION; OXYGEN VACANCIES; PHOTOLUMINESCENCE; NANOWIRES; GREEN; LUMINESCENCE; FABRICATION; DEFECTS

제목: Atomic layer deposition coating of ZnO shell for GaN-ZnO core-sheath heteronanowires

저자: Kim, Hyoun Woo; Yang, Ju Chan; Na, Han Gil; Lee, Chongmu

DOI: 10.1016/j.apsusc.2011.06.022

발행일: 2011-09

유형: Article

저널명: Applied Surface Science

권: 257

호: 22

페이지: 9420 ~ 9424