title: Self-powered flexible and transparent photovoltaic detectors based on CdSe nanobelt/graphene Schottky junctions.
abstract: Flexible and transparent electronic and optoelectronic devices have attracted more and more research interest due to their potential applications in developing portable, wearable, low-cost, and implantable devices. We have fabricated and studied high-performance flexible and transparent CdSe nanobelt (NB)/graphene Schottky junction self-powered photovoltaic detectors for the first time. Under 633 nm light illumination, typical photosensitivity and responsivity of the devices are about 1.2 × 10(5) and 8.7 A W(-1), respectively. Under 3500 Hz switching frequency, the response and recovery times of them are about 70 and 137 μs, respectively, which, to the best of our knowledge, are the best reported values for nanomaterial based Schottky junction photodetectors up to date. The detailed properties of the photodetectors, such as the influences of incident light wavelength and light intensity on the external quantum efficiency and speed, are also investigated. Detailed discussions are made in order to understand the observed phenomena. Our work demonstrates that the self-powered flexible and transparent CdSe NB/graphene Schottky junction photovoltaic detectors have a bright application prospect.
authors.affiliation: State Key Lab for Mesoscopic Physics and School of Physics, Peking University, Beijing, 100871, China.
authors.forename: Zhiwei
authors.initials: Z
authors.lastname: Gao
authors.forename: Weifeng
authors.initials: W
authors.lastname: Jin
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhou
authors.forename: Yu
authors.initials: Y
authors.lastname: Dai
authors.forename: Bin
authors.initials: B
authors.lastname: Yu
authors.forename: Chu
authors.initials: C
authors.lastname: Liu
authors.forename: Wanjin
authors.initials: W
authors.lastname: Xu
authors.forename: Yanping
authors.initials: Y
authors.lastname: Li
authors.forename: Hailin
authors.initials: H
authors.lastname: Peng
authors.forename: Zhongfan
authors.initials: Z
authors.lastname: Liu
authors.forename: Lun
authors.initials: L
authors.lastname: Dai
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry*; D004553:Electric Conductivity; D004581:Electronics; D006108:Graphite / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D018036:Selenium Compounds / Q000737:chemistry*; D012993:Solar Energy
chemical_list: D019187:Cadmium Compounds; D018036:Selenium Compounds; D006108:Graphite; C058667:cadmium selenide