Chiral perovskites for circularly polarized light detection

Abstract

In recent years, chiral metal halide perovskites (CMHPs) have emerged as promising candidates for next-generation circularly polarized light (CPL) photodetectors, owing to their intrinsic chirality, tunable optoelectronic properties, and compatibility with cost-effective solution processing. Unlike other CPL-responsive materials, CMHPs uniquely integrate strong chiroptical activity with semiconducting behavior, enabling direct polarization-resolved detection without auxiliary optical components. This review systematically summarizes recent progress in CMHPs-based CPL photodetection, encompassing fundamental chiroptical principles, structure–property relationships, and representative device architectures, including photoconductors, photodiodes, and phototransistors. Emphasis is placed on the emerging application potential of CPL detectors and the enabling role of CMHPs in achieving polarization-sensitive functionality. Key challenges and future directions are also discussed, such as enhancing chiroptical responses, designing intrinsically chiral three-dimensional perovskites, and realizing scalable, integrable device arrays. By clarifying current advances and outlining future research priorities, this review aims to guide innovation in CMHPs-enabled CPL optoelectronics.