Chiral hybrid organic-inorganic metal halides: A route toward direct detection and emission of polarized light

Summary

In conventional polarimeter and polarized emitters, devices based on inorganic semiconductors are equipped with polarization optics to obtain polarization control. In contrast, chiral materials are inherently sensitive to the polarization state of light and can be used for direct detection and generation of polarized light. Chiral hybrid organic-inorganic metal halides (HMHs) have recently emerged as a promising material class that combines the chirality of organic cations with the excellent charge transport properties of the inorganic lattice. This perspective aims to review the field's current understanding of chirality transfer in HMHs and its impact on the material's electronic structure and optical properties. Starting from the first report of a chiral HMH, we provide an overview of recent achievements. Efforts to improve and tune the chiroptical response are then assessed in detail, after which we provide an outlook and suggestions for future research directions to further improve chiral HMHs.