title: Piezo-phototronic effect enhanced UV photodetector based on CuI/ZnO double-shell grown on flexible copper microwire.
abstract: In this work, we present a facile, low-cost, and effective approach to fabricate the UV photodetector with a CuI/ZnO double-shell nanostructure which was grown on common copper microwire. The enhanced performances of Cu/CuI/ZnO core/double-shell microwire photodetector resulted from the formation of heterojunction. Benefiting from the piezo-phototronic effect, the presentation of piezocharges can lower the barrier height and facilitate the charge transport across heterojunction. The photosensing abilities of the Cu/CuI/ZnO core/double-shell microwire detector are investigated under different UV light densities and strain conditions. We demonstrate the I-V characteristic of the as-prepared core/double-shell device; it is quite sensitive to applied strain, which indicates that the piezo-phototronic effect plays an essential role in facilitating charge carrier transport across the CuI/ZnO heterojunction, then the performance of the device is further boosted under external strain.
authors.affiliation: Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences; National Center for Nanoscience and Technology (NCNST), Beijing, 100083, People's Republic of China.
authors.forename: Jingyu
authors.initials: J
authors.lastname: Liu
authors.affiliation: Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences; National Center for Nanoscience and Technology (NCNST), Beijing, 100083, People's Republic of China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences; National Center for Nanoscience and Technology (NCNST), Beijing, 100083, People's Republic of China.
authors.forename: Caihong
authors.initials: C
authors.lastname: Liu
authors.affiliation: Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences; National Center for Nanoscience and Technology (NCNST), Beijing, 100083, People's Republic of China.
authors.forename: Mingzeng
authors.initials: M
authors.lastname: Peng
authors.affiliation: Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences; National Center for Nanoscience and Technology (NCNST), Beijing, 100083, People's Republic of China.
authors.forename: Aifang
authors.initials: A
authors.lastname: Yu
authors.affiliation: Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences; National Center for Nanoscience and Technology (NCNST), Beijing, 100083, People's Republic of China.
authors.forename: Jinzong
authors.initials: J
authors.lastname: Kou
authors.affiliation: Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences; National Center for Nanoscience and Technology (NCNST), Beijing, 100083, People's Republic of China.
authors.forename: Wei
authors.initials: W
authors.lastname: Liu
authors.affiliation: Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences; National Center for Nanoscience and Technology (NCNST), Beijing, 100083, People's Republic of China. jyzhai@binn.cas.cn.
authors.forename: Junyi
authors.initials: J
authors.lastname: Zhai
authors.affiliation: College of Environmental Sciences and Engineering, Peking University, Beijing, China. juan.liu@pku.edu.cn.
authors.forename: Juan
authors.initials: J
authors.lastname: Liu
keywords: Double-shell nanostructure; Flexible nanodevice; Heterojunction; Photodetector; Piezo-phototronic effect