title: Two-Dimensional (C4H9NH3)2PbBr4Perovskite Crystals for High-Performance Photodetector.
abstract: Two-dimensional (2D) layered hybrid perovskites of (RNH3)2PbX4(R is an alkyl and X is a halide) have been recently synthesized and exhibited rich optical properties including fluorescence and exciton effects. However, few studies on transport and optoelectronic measurements of individual 2D perovskite crystals have been reported, presumably owing to the instability issue during electronic device fabrications. Here we report the first photodetector based on individual 2D (C4H9NH3)2PbBr4perovskite crystals, built with the protection and top contact of graphene film. Both a high responsivity (∼2100 A/W) and extremely low dark current (∼10-10A) are achieved with a design of interdigital graphene electrodes. Our study paves the way to build high-performance optoelectronic devices based on the emerging 2D single-crystal perovskite materials.
authors.affiliation: Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, P.R. China.|Academy for Advanced Interdisciplinary Studies, Peking University , Beijing 100871, P. R. China.
authors.forename: Zhenjun
authors.initials: Z
authors.lastname: Tan
authors.affiliation: Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, P.R. China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Wu
authors.affiliation: State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University , Beijing 100871, P. R. China.
authors.forename: Hao
authors.initials: H
authors.lastname: Hong
authors.affiliation: Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, P.R. China.
authors.forename: Jianbo
authors.initials: J
authors.lastname: Yin
authors.affiliation: Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, P.R. China.|Academy for Advanced Interdisciplinary Studies, Peking University , Beijing 100871, P. R. China.
authors.forename: Jincan
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, P.R. China.
authors.forename: Li
authors.initials: L
authors.lastname: Lin
authors.affiliation: Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, P.R. China.
authors.forename: Mingzhan
authors.initials: M
authors.lastname: Wang
authors.affiliation: Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, P.R. China.|Academy for Advanced Interdisciplinary Studies, Peking University , Beijing 100871, P. R. China.
authors.forename: Xiao
authors.initials: X
authors.lastname: Sun
authors.affiliation: Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, P.R. China.|Academy for Advanced Interdisciplinary Studies, Peking University , Beijing 100871, P. R. China.
authors.forename: Luzhao
authors.initials: L
authors.lastname: Sun
authors.affiliation: Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, P.R. China.
authors.forename: Yucheng
authors.initials: Y
authors.lastname: Huang
authors.affiliation: State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University , Beijing 100871, P. R. China.
authors.forename: Kaihui
authors.identifier: 0000-0002-8781-2495
authors.initials: K
authors.lastname: Liu
authors.affiliation: Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, P.R. China.
authors.forename: Zhongfan
authors.identifier: 0000-0003-0065-7988
authors.initials: Z
authors.lastname: Liu
authors.affiliation: Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, P.R. China.
authors.forename: Hailin
authors.identifier: 0000-0003-1569-0238
authors.initials: H
authors.lastname: Peng