Circularly polarized light (CPL) detection has emerged as a key technology for various optoelectronics. Chiral hybrid perovskites (CHPs) that combine CPL-sensitive absorption induced by chiral organic ligands and superior photoelectric properties of perovskites are promising candidates for direct CPL detection. To date, most of the CHP detectors are made up of polycrystalline thin-film, which results in a rather limited discrimination of CPL due to the existence of redundant impurities and intrinsic defect states originating from rapid crystallization process. Here, it is developed a direct CPL detector with high photocurrent and polarization selectivity based on low-defect CHP single-crystal nanowire arrays. Large-scale CHP nanowires are obtained through a micropillar template-assisted capillary-bridge rise approach. Thanks to the high crystallinity and ordered crystallographic alignment of these arrays, a CPL photodetector with high light on/off ratio of 1.8 × 10⁴, excellent responsivity of 1.4 A W⁻¹, and an outstanding anisotropy factor of 0.24 for photocurrent has been achieved. These results would provide useful enlightenment for direct CPL detection in high-performance chiral optoelectronics.

中文翻译：

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用于高性能圆偏振光检测的手性杂化钙钛矿单晶纳米线阵列

圆偏振光（CPL）检测已成为各种光电子学的关键技术。手性杂化钙钛矿 (CHP) 结合了手性有机配体诱导的 CPL 敏感吸收和钙钛矿优异的光电特性，是直接 CPL 检测的有希望的候选者。迄今为止，大多数CHP探测器都是由多晶薄膜制成，由于存在冗余杂质和快速结晶过程产生的固有缺陷态，导致对CPL的辨别力相当有限。这里，开发了一种基于低缺陷CHP单晶纳米线阵列的具有高光电流和偏振选择性的直接CPL探测器。大规模CHP纳米线是通过微柱模板辅助毛细管桥上升方法获得的。由于这些阵列的高结晶度和有序晶体排列，我们实现了具有1.8 × 10 ⁴的高光开/关比、1.4 AW ^{-1的优异响应度和0.24的光电流各向异性因子的CPL光电探测器。}这些结果将为高性能手性光电子学中的直接CPL检测提供有益的启示。