High-performance UV detector made of ultra-long ZnO bridging nanowires

被引：211

作者：

Li, Yanbo ^{[1
]}

Della Valle, Florent ^{[1
]}

Simonnet, Mathieu ^{[1
]}

Yamada, Ichiro ^{[1
]}

Delaunay, Jean-Jacques ^{[1
]}

机构：

[1] Univ Tokyo, Dept Engn Synth, Bunkyo Ku, Tokyo 1138656, Japan

来源：

NANOTECHNOLOGY | 2009年 / 20卷 / 04期

关键词：

THERMAL EVAPORATION METHOD; NANOBRIDGE DEVICES; ULTRAVIOLET DETECTORS; ZINC-OXIDE; FABRICATION; PHOTORESPONSE; SURFACES; FILMS;

D O I：

10.1088/0957-4484/20/4/045501

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A nanowatt UV photoconductive detector made up of ultra-long (similar to 100 mu m) ZnO bridging nanowires has been fabricated by a single-step chemical vapor deposition (CVD) process. The electrodes, forming comb-shaped thick ZnO layers, and the sensing elements, consisting of ZnO nanowires bridging the electrodes, were fabricated simultaneously in a single-step CVD process. The device showed drastic changes (10-10(5) times) in current under a wide range of UV irradiances (10(-8) - 10(-2) W cm(-2)). Moreover, the detector exhibited fast response (rise and decay times of the order of 1 s) to UV illumination in air, but no response to visible light (hv < 3.2 eV). Our approach provides a simple and cost-effective way to fabricate high-performance 'visible-blind' UV detectors.

引用

页数：5

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