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- Title
Microstructure, wettability and electrical properties of n-ZnO/ZnO-SL/p-CuO heterojunction.
- Authors
Zhao, Min; Cao, Li; Sun, Yue; Lv, Jianguo; Shang, Fengjiao; Mao, Sicong; Jiang, Yaoyao; Xu, Jinhua; Wang, Feng; Zhou, Zhitao; Wei, Yiyong; He, Gang; Zhang, Miao; Song, Xueping; Sun, Zhaoqi
- Abstract
ZnO/ZnO-SL/CuO heterojunction was successfully fabricated on Cu foil by hydrothermal and sol-gel method. Crystalline phase, surface morphology and photoluminescence spectrum of the heterojunction were measured by X-ray diffraction, scanning electronic microscopy and fluorescence spectrometer, respectively. Contact angles of ZnO thin films were measured using a contact angle apparatus. The current-voltage characteristics of heterojunction in dark were investigated at room temperature. The results indicated that the heterojunction was composed of CuO phase and ZnO phase. The post-heat temperature of 250 °C was beneficial to preferred growth of ZnO thin film along the c-axis direction. The Sample 2 was composed of the uniform, compact and vertically aligned ZnO nanorods and has the most obvious hydrophobic-to-hydrophilic transition. The transport characteristics of the Sample 2 may be related to the space-charge-limited current in region II and a trapped-charge-limited current in region III.
- Subjects
MICROSTRUCTURE; WETTING; METALLIC oxides; PHOTOLUMINESCENCE; HYDROPHILIC interactions; SPACE-charge-limited conduction
- Publication
Applied Physics A: Materials Science & Processing, 2015, Vol 120, Issue 1, p335
- ISSN
0947-8396
- Publication type
Article
- DOI
10.1007/s00339-015-9191-3