摘要
一维ZnO纳米结构由于具有比表面积大、室温下具有大激子结合能等特点而受到广泛关注.但是如何实现纳米结构的器件一直是目前研究的一个挑战.文章通过水热方法,在玻璃衬底上实现了ZnO纳米线横向生长,并制备出基于ZnO纳米线的金属-半导体-金属紫外探测器.测量结果显示器件在365 nm处探测器的响应度达到5 A/W,并且制备的探测器在空气中对紫外光照具有快速的响应,其上升时间约4 s,下降时间约5 s,这与ZnO纳米线中的氧空位吸附和脱附水分子相关.
One-dimensional ZnO nanostructure is especially attractive because of its unique properties such as high surface-to-volume ratio and a large exciton binding energy, but how to put it into a device is still a challenge. In this article, we show that a novel lateral metal- semiconductor-metal ultraviolet detector composed of ZnO nanowires is fabricated on glass substrate by a single-step hydrothermal approach. The fabricated photodetector demonstrates that the response to UV illumination in air is fast, the rise time is about 4 s, and the fall time is about 5 s, which could be attributed to the fact that the adsorption and the desorption of water molecules in the air onto oxygen vacancy of the nanowire significantly influence the photoresponse.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2012年第5期97-100,共4页
Acta Physica Sinica
基金
国家重点基础研究发展计划(批准号:2011CB302006)资助的课题~~
关键词
ZNO纳米线
水热反应
上升时间和下降时间
水分子
ZnO nanowires, hydrothermal reaction, the rise time and fall time, water molecules
