KMS Chongqing Institute of Green and Intelligent Technology, CAS
Direct Catalyst-Free Chemical Vapor Deposition of ZnO Nanowire Array UV Photodetectors with Enhanced Photoresponse Speed | |
Zhan, Zhaoyao1; Xu, Liping2,3; An, Jianing1; Du, Hejun1; Weng, Zhankun3; Lu, Wenqiang2 | |
2017-08-01 | |
摘要 | ZnO-based photodetectors (PDs) have long response times at magnitude of tens to hundreds of seconds, hampering their practical UV detection. The slow oxygen chemisorption/desorption process is the main cause of the slow response of UV PDs based on single ZnO nanowires (NWs). Here, the authors find the response speed of ZnO NW-based UV PDs could be improved by directly fabricating UV PDs on entangled ZnO NW array grown on SiO2 through a catalyst-free chemical vapor deposition (CVD) process. Specifically, the interconnections in ZnO NW array creates NW-NW junction barriers, which dominate the inter-wire charge transport. The switching of UV illumination induces fast tuning of NW-NW junction barrier height, which contributes to the enhanced response speed of the ZnO NW array UV PDs. |
DOI | 10.1002/adem.201700101 |
发表期刊 | ADVANCED ENGINEERING MATERIALS |
ISSN | 1438-1656 |
卷号 | 19期号:8页码:9 |
收录类别 | SCI |
WOS记录号 | WOS:000408639700022 |
语种 | 英语 |