Chiral Perovskites: Controlled Synthesis and Photonic Device Applications

Abstract In recent years, research on metal–halide perovskites have expanded rapidly, positioning these materials as highly promising semiconductors thanks to their remarkable optoelectronic properties. When chiral molecules are introduced into the crystal lattice, or when chiral ligands are attached to the surface, it becomes possible to obtain chiral metal–halide perovskites. These materials combine the excellent electronic and optical characteristics of conventional perovskites with intrinsic chirality, which gives rise to unique functionalities such as circular dichroism (CD), circularly polarized luminescence (CPL), nonlinear optical responses, spintronic behavior, ferroelectricity, and the chiral-induced spin selectivity (CISS) effect. As a result, these materials hold great promise for applications in optoelectronics, optical devices, photovoltaics, and spintronics. This review summarizes recent developments in chiral metal–halide perovskites, focusing on their synthesis strategies, crystal structures, mechanisms behind chirality induction, CPL behavior, and emerging applications. Building on these advances, the key challenges that currently limit their progress are discussed, together with possible directions for future research. A deeper understanding of the optoelectronic properties and design principles of chiral metal–halide perovskites is expected to provide valuable theoretical guidance and support the development of next-generation chiral perovskite materials.