Optically Powered ZnO Nanowires with Symmetric and Asymmetric Contacts

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	Optically Powered ZnO Nanowires with Symmetric and Asymmetric Contacts
	Zhang, LH ; Zhang, XX ; Lai, JL ; Liu, Z ; Hou, SM ; Xie, SS ; Gao, M
刊名	JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
	2013
卷号	13 期号:2 页码:1203
关键词	ZnO Nanowire Photovoltage Photocurrent Position Sensitivity Schottky Barrier
ISSN号	1533-4880
通讯作者	Gao, M (reprint author), Peking Univ, Key Lab Phys & Chem Nanodevices, Beijing 100871, Peoples R China.
中文摘要	In this paper, we show large photovoltage and photocurrent obtained in individual ZnO nanowire devices with symmetrical and asymmetrical contacts. Ti/Au terminal electrodes were deposited for symmetrical contacts, while Ti/Au and Au electrodes were employed for asymmetrical contacts. Photovoltage and photocurrent measurements were carried out on individual ZnO nanowires devices without external bias. The symmetric nanowire devices exhibited similar to 3 mV photovoltage and similar to 10 nA photocurrent powered by UV laser illumination, while similar to 60 mV photovoltage and similar to 10 nA photocurrent were obtained for asymmetric contacts. Furthermore, the photovoltage were noticeably dependent on the local excitation position. Further calculation showed that the laser illumination reduced the Schottky barrier heights. The above results can be understood on the basis of illumination controlled Schottky barrier heights at nanowire-metal contacts and surface oxygen adsorption-desorption. We demonstrate that the simple two-terminal devices can be useful for self-powered and position sensitive photodetection, optically powered circuit, and nanowire based integrated nanophotonics.
资助信息	National Science Foundation of China [51072006, 60971003, 90921012]; MOST [2007CB936204]; Program for New Century Excellent Talents in University; SRF for ROCS, SEM
语种	英语
公开日期	2014-01-16
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/57298]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Zhang, LH,Zhang, XX,Lai, JL,et al. Optically Powered ZnO Nanowires with Symmetric and Asymmetric Contacts[J]. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY,2013,13(2):1203.
APA	Zhang, LH.,Zhang, XX.,Lai, JL.,Liu, Z.,Hou, SM.,...&Gao, M.(2013).Optically Powered ZnO Nanowires with Symmetric and Asymmetric Contacts.JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY,13(2),1203.
MLA	Zhang, LH,et al."Optically Powered ZnO Nanowires with Symmetric and Asymmetric Contacts".JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 13.2(2013):1203.