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Ambipolar solution-processed CH3NH3PbBr3 perovskite phototransistors with ultra-thin Al2O3 protective layer

Hao Yu,Lizhi Yan,Renzheng Qiu,Xiaote Xu,Wen Luo,Hang Zhou

2018 IEEE International Conference on Electron Devices and Solid State Circuits (EDSSC)（2018）

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Abstract
Organic-inorganic halide perovskite materials are attracting great attention for their excellent photoelectronic properties. Here we report the CH 3 NH 3 PbBr 3 perovskite phototransistors with bipolar behaviors. The photoresponsivity of the perovskite devices reaches 4 AW -1 on V GS = -2.2 V. In addition, the stability of organolead halide perovskite phototransistors is further improved by inserting ultra-thin Al 2 O 3 protective layer. The solution-based process and excellent device performance facilitate CH 3 NH 3 PbBr 3 perovskite as candidate materials for photoelectronic applications.
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Key words
perovskite,CH3NH3PbBr3,phototransistors,protective layer
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