Two-Dimensional (C4H9NH3)2PbBr4 Perovskite Crystals for High-Performance Photodetector

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[1] [1,Tan, Zhenjun
[2] Wu, Yue
[3] Hong, Hao
[4] Yin, Jianbo
[5] 1,Zhang, Jincan
[6] Lin, Li
[7] Wang, Mingzhan
[8] 1,Sun, Xiao
[9] 1,Sun, Luzhao
[10] Huang, Yucheng
[11] Liu, Kaihui
[12] Liu, Zhongfan
[13] Peng, Hailin
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Liu, Z. (zfliu@pku.edu.cn) | 1600年 / American Chemical Society卷 / 138期
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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)2PbBr4 perovskite crystals; built with the protection and top contact of graphene film. Both a high responsivity (∼2100 A/W) and extremely low dark current (∼10-10 A) 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. © 2016 American Chemical Society;
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