title: Passivation of surface states in the ZnO nanowire with thermally evaporated copper phthalocyanine for hybrid photodetectors.
abstract: The adsorption of O2/H2O molecules on the ZnO nanowire (NW) surface results in the long lifetime of photo-generated carriers and thus benefits ZnO NW-based ultraviolet photodetectors by suppressing the dark current and improving the photocurrent gain, but the slow adsorption process also leads to slow detector response time. Here we show that a thermally evaporated copper phthalocyanine film is effective in passivating surface trap states of ZnO NWs. As a result, the organic/inorganic hybrid photodetector devices exhibit simultaneously improved photosensitivity and response time. This work suggests that it could be an effective way in interfacial passivation using organic/inorganic hybrid structures.
authors.affiliation: Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Chen
authors.forename: Huaiyi
authors.initials: H
authors.lastname: Ding
authors.forename: Yukun
authors.initials: Y
authors.lastname: Wu
authors.forename: Mengqiao
authors.initials: M
authors.lastname: Sui
authors.forename: Wei
authors.initials: W
authors.lastname: Lu
authors.forename: Bing
authors.initials: B
authors.lastname: Wang
authors.forename: Wenming
authors.initials: W
authors.lastname: Su
authors.forename: Zheng
authors.initials: Z
authors.lastname: Cui
authors.forename: Liwei
authors.initials: L
authors.lastname: Chen