Processable Circularly Polarized Luminescence for the Synthesis of Chiral Plasmonic Nanoparticles

Abstract

Circularly polarized light is previously shown as a chiral bias to enable the synthesis of chiral plasmonic nanomaterials through light-matter interactions. The traditional approach for circularly polarized light generation relies on a “top-down” approach by removing undesired light polarization through optics, which suffers from energy loss and compatibility issues. An alternative approach is to develop chiral phosphors that emit efficient circularly polarized luminescence (CPL). However, most materials fail to produce processable CPL with both high quantum yield and dissymmetry factors, let alone the synthesis of chiral nanomaterials. Herein, a liquid-crystal-templated framework is developed to assemble halide perovskite nanocrystals, CsPbX3 (X = Cl, Br, I), and achieved efficient CPL with the record-high figure of merit (FM) for three primary colors (Red, Green, Blue). The fidelity of the CPL is further demonstrated in the synthesis of chiral gold nanoparticles, where a five-fold increase in optical activity is achieved.