Chiral Hybrid Perovskite Single‐Crystal Nanowire Arrays for High‐Performance Circularly Polarized Light Detection

Advanced Science

Zhen Liu¹  Yuwei Guan¹  Fengqin Hu¹  Ang Ren²  Xiaolong Liu²  Yong Sheng Zhao²  Chunhuan Zhang²  Zhonghao Zhou²  Chan Qiao²  Yuqing Fan² 

[1] College of Chemistry Beijing Normal University Beijing 100875 China;Key Laboratory of Photochemistry Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China;

关键词: chiral hybrid perovskites;    circularly polarized light detection;    nanowire arrays;    perovskite nanowires;    perovskite photodetectors;   

DOI  :  10.1002/advs.202102065

来源: DOAJ

【 摘 要 】

Abstract 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.

【 授权许可】

Unknown