title: Self-powered UV photosensor based on PEDOT:PSS/ZnO micro/nanowire with strain-modulated photoresponse.
abstract: Developing tailored micro/nanostructure interfaces is an effective way to make novel optoelectronic devices or enhance their performances. Here we report the fabrication of a PEDOT:PSS/ZnO micro/nanowire-based self-powered UV photosensor. The generation of photocurrent at zero bias is attributed to the separation of photogenerated electron-hole pairs within the built-in electric field at the PEDOT:PSS/ZnO interface upon UV light illumination. Furthermore, the piezotronic effect on the UV photoresponsivity under different strains is investigated, which is due to the modification of energy band diagram at the p-n heterojunction by strain-induced piezoelectric polarization. This study demonstrates a prospective approach to engineering the performance of a photodetector through straining and may offer theoretical supporting in future optoelectronic device fabrication and modification.
authors.affiliation: State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, Beijing 100083, People's Republic of China.
authors.forename: Pei
authors.initials: P
authors.lastname: Lin
authors.forename: Xiaoqin
authors.initials: X
authors.lastname: Yan
authors.forename: Zheng
authors.initials: Z
authors.lastname: Zhang
authors.forename: Yanwei
authors.initials: Y
authors.lastname: Shen
authors.forename: Yanguang
authors.initials: Y
authors.lastname: Zhao
authors.forename: Zhiming
authors.initials: Z
authors.lastname: Bai
authors.forename: Yue
authors.initials: Y
authors.lastname: Zhang