【摘 要】
：
Polarization-sensitive photodetection is central to optics applications and has been successfully demonstrated in photodetectors of two-dimensional(2D)materials,such as layered hybrid perovskites;however,achieving high polarization sensitivity in such a p
【机 构】
：
State Key Laboratory of Structural Chemistry,Fujian Institute of Research on the Structure of Matter
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Polarization-sensitive photodetection is central to optics applications and has been successfully demonstrated in photodetectors of two-dimensional(2D)materials,such as layered hybrid perovskites;however,achieving high polarization sensitivity in such a photodetector remains extremely challenging.Here,for the first time,we demonstrate a high-performance polarization-sensitive photodetector using single-crystalline 2D/3D perovskite heterostructure,namely,(4-AMP)(MA)2Pb3Br10/MAPbBr3(MA=methylammonium;4-AMP=4-(aminomethyl)piperidinium),which exhibits ultrahigh polarization sensitivity up to 17.6 under self-driven mode.To our knowledge,such a high polarization selectivity has surpassed all of the reported perovskite-based devices,and is comparable to,or even better than,the traditional inorganic heterostructure-based photodetectors.Further studies reveal that the built-in electric field formed at the junction can spatially separate the photogenerated electrons and holes,reducing their recombination rate and thus enhancing the performance for polarization-sensitive photodetection.This work provides a new source of polarization-sensitive materials and insights into designing novel optoelectronic devices.
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