摘要
制备了基于单根ZnO纳米线的紫外光探测原型器件,并研究了聚苯乙烯硫酸钠表面修饰对器件紫外响应特性的影响.研究发现,在相同的紫外光照射条件下,表面修饰后的器件对紫外光的探测灵敏度比修饰前提高了3个数量级.I-V特性研究表明,修饰前后器件在光照时的电导没有明显变化,但修饰后器件的暗电导却下降了3个数量级.这说明通过表面修饰降低探测器的暗电导是提高紫外光探测器灵敏度的一条重要途径.
Single ZnO nanowire ultraviolet （UV） photodetector has been fabricated, and the enhancement of its UV photoresponse by polystyrene sulfate surface functionalization has been investigated. It is found that, under the same UV light irradiation, UV photoresponse of the detector with surface functionalization increases by three orders of magnitude as compared to that without surface coating. By comparing I- V characteristics of the detectors, we find that the dark conductance of the device can decrease by three orders of magnitude after surface coating while the light conductance shows little variation. The result demonstrates that one can readily enhance the UV photoresponse of the photodetector by surface functionalization.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2008年第12期7855-7859,共5页
Acta Physica Sinica
基金
国家重点基础研究发展规划(批准号:2006CB922002)资助的课题~~
关键词
紫外光探测器
纳米结构
ZNO
表面修饰
ultraviolet photodetector, nanostructure, ZnO, surface functionalization
