Wang Lin, Xue Yongxiang, Cui Minghuan, Huang Yanmin, Xu Hongyu, Qin Chaochao, Yang Jien, Dai Haitao, Yuan Mingjian
Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin, 300071, P. R. China.
Renewable Energy Conversion and Storage Center (RECAST), Nankai University, Tianjin, 300071, P. R. China.
Angew Chem Int Ed Engl. 2020 Apr 16;59(16):6442-6450. doi: 10.1002/anie.201915912. Epub 2020 Mar 2.
Chiral quasi-2D perovskite single crystals (SCs) were investigated for their circular polarized light (CPL) detecting capability. Quasi-2D chiral perovskites, [(R)-β-MPA] MAPb I ((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.
研究了手性准二维钙钛矿单晶（SCs）的圆偏振光（CPL）探测能力。准二维手性钙钛矿[(R)-β-MPA]MAPbI（(R)-β-MPA=(R)-(+)-β-甲基苯乙胺，MA=甲铵）具有固有手性，能够区分CPL光子的不同偏振态。相应的准二维SCs CPL光电探测器表现出优异的探测性能。特别是，我们的器件响应度比迄今为止报道的二维钙钛矿CPL探测器几乎高一个数量级。调节薄膜的结晶动力学以促进其载流子传输。具有均匀能量分布的平行取向钙钛矿薄膜对于最大化载流子收集效率至关重要。该光电探测器还表现出优异的机械柔韧性和耐久性，是灵敏且坚固的CPL光电探测器的有前途的候选者。
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