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A Chiral Reduced‐Dimension Perovskite for an Efficient Flexible Circularly Polarized Light Photodetector
Author(s) -
Wang Lin,
Xue Yongxiang,
Cui Minghuan,
Huang Yanmin,
Xu Hongyu,
Qin Chaochao,
Yang Jien,
Dai Haitao,
Yuan Mingjian
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201915912
Subject(s) - photodetector , responsivity , perovskite (structure) , materials science , optoelectronics , circular polarization , chirality (physics) , detector , photonics , photon , polarization (electrochemistry) , optics , physics , crystallography , chiral symmetry , chemistry , particle physics , microstrip , nambu–jona lasinio model , quark
Chiral quasi‐2D perovskite single crystals (SCs) were investigated for their circular polarized light (CPL) detecting capability. Quasi‐2D chiral perovskites, [( R )‐β‐MPA] 2 MAPb 2 I 7 (( R )‐β‐MPA=( R )‐(+)‐β‐methylphenethylamine, MA=methylammonium), have intrinsic chirality and the capability to distinguish different polarization states of CPL photons. Corresponding quasi‐2D SCs CPL photodetector exhibit excellent detection performance. In particular, our device responsivity is almost one order of magnitude higher than the reported 2D perovskite CPL detectors to date. The crystallization dynamics of the film were modulated to facilitate its carrier transport. Parallel oriented perovskite films with a homogeneous energy landscape is crucial to maximize the carrier collection efficiency. The photodetector also exhibits superior mechanical flexibility and durability, representing a promising candidate for sensitive and robust CPL photodetectors.