Photoresponse and decay mechanism of an individual ZnO nanowire UV sensor
Photoresponse and decay mechanism of an individual ZnO nanowire UV sensor
复制标题
单个 ZnO 纳米线紫外传感器的光响应和衰减机制
DOI：
10.1016/j.sna.2011.11.030
复制
发表时间：
2012-02-01
影响因子：
4.6
通讯作者：
Hou, Hongtao
中科院分区：
文献类型：
--
作者：
Lang, Ying;Gao, Hong;Hou, Hongtao
UV sensor based on an individual ZnO nanowire (NW) was fabricated by micro-grid template method. The photo-electric properties of the sensor were investigated under the illumination of He-Cd laser (325 nm). The current-voltage (I-V) characteristics are linear and the resistivity of the ZnO NWs is calculated to be 1.7 Omega cm in dark and 0.2 Omega cm under UV illumination. The decay process, after the illumination is off, exhibits a third-order exponential decay function, with time constants of tau(1) = 0.2 s. tau(2) = 8.5 s and tau(3) = 86.6 s. It can be attributed to the electron-hole recombination, and the readsorption of vaporized water and oxygen molecules. (C) 2011 Elsevier B.V. All rights reserved.
