Chiral Perovskite Nanocrystal Composition for High CPL Efficiency

The patent employs composite materials by combining chiral molecules with perovskite nanocrystals to create a hybrid system that exhibits enhanced circularly polarized luminescence properties. The chiral molecules are surface-functionalized on the perovskite nanocrystals, creating a composite structure that achieves high luminescence dissymmetry g-factors while maintaining manageable device complexity through controlled integration of the two components.

The chiral molecules are specifically positioned on the surface of the perovskite nanocrystals, creating local chiral environments that enhance the CPL properties. This local functionalization approach allows the bulk perovskite material to maintain its excellent optoelectronic properties while the surface region provides the necessary chiral optical activity, thereby achieving high g-factors without requiring complete restructuring of the entire material system.

The chiral molecules are introduced during the synthesis process of the perovskite nanocrystals, allowing surface functionalization to occur concurrently with crystal formation. This preliminary action approach ensures uniform distribution and orientation of chiral molecules on the nanocrystal surfaces without requiring subsequent complex surface modification steps, thereby achieving high g-factors while managing manufacturing precision requirements.

The synthesis methodology allows the chiral molecules to self-organize and self-assemble on the perovskite nanocrystal surfaces during the crystallization process. This self-service mechanism reduces the need for precise external control and manual intervention in the surface functionalization process, achieving uniform chiral coverage and high luminescence dissymmetry through spontaneous molecular organization.