Anionic ligand-induced chirality in perovskite nanoplatelets

Perovskite materials passivated by chiral ligands have recently shown unique chiroptical activity with promising optoelectronic applications. However, the ligands have been limited to chiral amines. Here, chiral phosphate molecules have been exploited to synthesize CsPbBr 3 nanoplatelets. The nanoplatelets showed a distinct circular dichroism signal and maintained their chiroptical properties after purification with anti-solvent. In this work, we synthesized chiral CsPbBr 3 nanoplatelets using anionic binaphthyl-based ligands. The nanoplatelets showed a distinct circular dichroism signal due to the interaction between the nanoplatelets and the chiral ligands on their surface.