Chiral Orbital Modifying Dipolar Polarization and Recombination in Chiral Perovskites.

The chiral spatial structure of chiral perovskite materials enriches the physical and optical properties of perovskite materials, making them an excellent platform to deeply understand charge-spin-photon interactions. In this work, we fabricated chiral perovskite crystals and their nonchiral isomeric counterparts. The significant differences in the crystal structures of these two types of materials lead to notable variations in their fluorescence lifetimes and electron-phonon coupling strength, which present an externally presentable change in physical properties, such as the dielectric constant. Moreover, inside chiral structures, the chiral orbit should be taken into account. Under the effect of a magnetic field versus a chiral orbit, dipolar polarization and charge recombination will be rebalanced after disruption, where the dielectric constants and photoluminescence intensities of the S- and R-type chiral perovskites display opposite trends. It is also noted that chiral orbit-induced spin relaxation determined the spin dependence of recombination, which presents a potential materials platform to fabricate devices resisting external signal interference well.