Efficient green emission of circularly polarized luminescence from chiral Ruddlesden–Popper perovskites stabilized in mesoporous silica with alloyed spacer cations

phase distribution, which reduces non-radiative recombination to improve PLQY. Moreover, the protection of the SBA15 matrix enhances the stability of composite powders against harsh conditions such as light, heat, and environment stress. The resulting composites can be readily employed in circularly polarized light-emitting diode devices. This research is poised to provide a novel and feasible pathway for the large-scale production of chiral perovskite nanomaterials and their applications in circularly polarized light-emitting technologies.