Enhanced UV photoresponse from heterostructured Ag-ZnO nanowires

被引：121

作者：

Lin, Dandan ^{[1
]}

Wu, Hui ^{[1
]}

Zhang, Wei ^{[1
]}

Li, Heping ^{[1
]}

Pan, Wei ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 17期

基金：

中国国家自然科学基金;

关键词：

conduction bands; electrospinning; III-V semiconductors; nanoparticles; nanowires; photoconductivity; photodetectors; silver; wide band gap semiconductors; zinc compounds; PHOTODETECTORS;

D O I：

10.1063/1.3126045

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Photoactive material consisting of heterogeneous Ag-ZnO nanowires (NWs) was prepared by electrospinning. Tunable UV photodetectors fabricated using Ag-ZnO NWs have shown high sensitivity up to over four orders of magnitude with relatively fast and stable response speed. The mechanism for this colossal photoconductivity is elucidated by means of the efficient exciton dissociation under UV illumination due to accelerated electron transfer from conduction band of ZnO to Ag nanoparticles. The facile process proposed here may pave the way for designing sensing and imaging systems.

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页数：3

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