Deciphering the electronic and structural origin of chiroptical activity of chiral 2D perovskites.

ABSTRACT: Understanding the structure-chiroptical activity relationship in chiral perovskites is of great significance as it provides a pathway to control light-matter interactions. Although many reports have shown various chiral structures with distinctive chiroptical responses, a clear structure-property relationship is still missing, partially stemming from the poor understanding of the optical activity mechanism. For instance, it remains unclear if and how the chiroptical activity is related to exciton spin splitting. Herein, we used magnetic circular dichroism to probe the exciton spin splitting in a series of chiral 2D perovskites. Our results show that the anisotropy factor of circular dichroism is indeed proportional to the exciton spin splitting energy, with larger splitting energy yielding

SUBMITTER: Zhang Z 

PROVIDER: S-EPMC11582629 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature