Preparation of p-SnO/n-ZnO Heterojunction Nanowire Arrays and Their Optoelectronic Characteristics under UV Illumination
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概要
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In this work, the use of a ZnO-nanowire (NW)-based heterojunction array structure for application to UV sensors is proposed. Nano-heterojunction arrays (NHAs) were formed via the oblique-angle sputtering deposition of p-type tin monoxide onto vertically aligned ZnO-NWs grown by hydrothermal growth (HTG). The current density--voltage ($J$--$V$) curve in darkness shows that the prepared SnO/ZnO-NW NHAs have rectifying current--voltage characteristics. They also exhibit a superior response to UV (254 nm) light illumination. The optoelectronic properties of the SnO/ZnO-NW NHAs with different SnO thicknesses (50--1000 nm) under different UV light intensities (2--6 mW/cm2) were investigated and discussed. UV sensitivity ($I_{\text{UV}}/I_{\text{dark}}$) as high as 8.5 was obtained.
- 2011-02-25
著者
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Hsu Yu-wei
Institute Of Manufacturing Technology National Taipei University Of Technology
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Wang Shui-Jinn
Advanced Optoelectronic Technology Center, National Cheng Kung University, Tainan, Taiwan 70101, R.O.C.
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Lin Zeng-Sing
Institute of Microelectronics, Department of Electrical Engineering, National Cheng Kung University, Tainan, Taiwan 701, R.O.C.
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Kuo Chao-Yin
Institute of Microelectronics, Department of Electrical Engineering, National Cheng Kung University, Tainan, Taiwan 701, R.O.C.
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Tsai Fu-Shou
Institute of Microelectronics, Department of Electrical Engineering, National Cheng Kung University, Tainan, Taiwan 701, R.O.C.
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Tu Yung-Chun
Institute of Microelectronics, Department of Electrical Engineering, National Cheng Kung University, Tainan, Taiwan 701, R.O.C.
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Ko Rong-Ming
Advanced Optoelectronic Technology Center, National Cheng Kung University, Tainan, Taiwan 701, R.O.C.
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Wang Shui-Jinn
Advanced Optoelectronic Technology Center, National Cheng Kung University, Tainan, Taiwan 701, R.O.C.
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Hsu Yu-Wei
Institute of Microelectronics, Department of Electrical Engineering, National Cheng Kung University, Tainan, Taiwan 701, R.O.C.
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Tsai Fu-Shou
Institute of Microelectronics, Department of Electrical Engineering, National Cheng Kung University, Tainan 701, Taiwan
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Tu Yung-Chun
Institute of Microelectronics, Department of Electrical Engineering, National Cheng Kung University, Tainan 701, Taiwan
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