Cathodoluminescence Properties of ZnO Tower-Like Structures Prepared by Thermal Oxidation

Zhiyan Xiao; Morihro Okada; Masayoshi Ichimiya; Tadashi Itoh; Gui Han; Yoichiro Neo; Toru Aoki; Hidenori Mimura

doi:10.1380/ejssnt.2009.358

Conference -ICSFS-14-

Cathodoluminescence Properties of ZnO Tower-Like Structures Prepared by Thermal Oxidation

Zhiyan Xiao, Morihro Okada, Masayoshi Ichimiya, Tadashi Itoh, Gui Han, Yoichiro Neo, Toru Aoki, Hidenori Mimura

Author information

Zhiyan Xiao
Research Institute of Electronics, Shizuoka University, Japan
Morihro Okada
Research Institute of Electronics, Shizuoka University, Japan
Advanced Technology Research Lab., Nippon Steel Corporation, Japan
Masayoshi Ichimiya
CREST, Japan Science and Technology Agency, Japan
Graduate School of Engineering Science, Osaka University, Japan
Tadashi Itoh
CREST, Japan Science and Technology Agency, Japan
Graduate School of Engineering Science, Osaka University, Japan
Gui Han
Research Institute of Electronics, Shizuoka University, Japan
Yoichiro Neo
Research Institute of Electronics, Shizuoka University, Japan
Toru Aoki
Research Institute of Electronics, Shizuoka University, Japan
Hidenori Mimura
Research Institute of Electronics, Shizuoka University, Japan

Keywords: ZnO tower-like structures, Cathodoluminescence, Surface defect, Penetration depth

JOURNAL FREE ACCESS

2009 Volume 7 Pages 358-361

DOI https://doi.org/10.1380/ejssnt.2009.358

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Abstract

ZnO tower-like structures with hexagonal cross section were fabricated by a thermal oxidation method. Spatially resolved cathodoluminescence (CL) intensity images were employed to correlate the luminescent properties with the investigated structure. Local CL monochromatic images revealed that the bodies of ZnO tower-like structures were the major source for a strong green emission. The depth-resolved UV and green CL emissions were examined by changing the accelerating voltage. A part of reabsorbed UV emission is converted into green emission and partly contributes the enhancement of green emission. [DOI: 10.1380/ejssnt.2009.358]

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