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

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• 作者：Zhenjun Tan ; Yue Wu ; Hao Hong ; Jianbo Yin ; Jincan Zhang ; Li Lin ; Mingzhan Wang ; Xiao Sun ; Luzhao Sun ; Yucheng Huang ; Kaihui LiuZhongfan Liu ; Hailin Peng
• 刊名：Journal of the American Chemical Society
• 出版年：2016
• 出版时间：December 28, 2016
• 年：2016
• 卷：138
• 期：51
• 页码：16612-16615
• 全文大小：320K
• ISSN：1520-5126

文摘

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.