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.