Realization of vis–NIR Dual-Modal Circularly Polarized Light Detection in Chiral Perovskite Bulk Crystals

• DOI: 10.1021/jacs.1c07183
• Publication Date: 2021-08-24T18:13:39Z
• Authors: Yu Peng; Xitao Liu; Lina Li; YunPeng Yao; Huang Ye; Xiaoying Shang; Xueyuan Chen; Junhua Luo
• Keywords: Realization (probability)

Circularly polarized light (CPL)-sensitive direct detection is attracting increasing attention owing to its various optical technology applications and ultracompact device structures. However, current CPL-sensitive mainly focuses on a single mode, whereas the visible-near-infrared (vis-NIR) dual-modal detection, which important for improving sensitivity night-vision performance, still remains be explored. Here, first time, vis-NIR presented in bulk crystals of two-dimensional chiral perovskite (R-BPEA)2PbI4 (R-BPEA = (R)-1-(4-bromophenyl)ethylammonium). Benefiting from strong light-matter interaction layered structure, shows two-photon absorption (TPA) coefficient up 55 cm/MW, almost falls around highest value 2D hybrid perovskites. Notably, exhibits high detecting performance under both visible (520 nm) NIR (800 nm), with on/off ratios higher than 103, anisotropy factors photocurrent 0.1. This work will shed design new semiconductors large TPA promote their detection.