Highly Efficient, Spatially Pure Circularly Polarized Luminescence from Bilayer Self-Assembled Colloidal Quantum Wells and Soft Helical Superstructures.

ABSTRACT: Circularly polarized luminescence (CPL) is important for multiple photonic technologies. It can be achieved with high asymmetry factors (g_lum) by combining quantum emitters (QEs) with one-dimensional helical superstructures (1D-HS). However, existing 1D-HS systems face challenges of maintaining polarization purity across viewing angles, primary due to the mismatch between QE emission profiles and the photonic bandgap of 1D-HS across off-normal directions. Herein, efficient and controllable CPL is proposed and developed using the self-assembly of colloidal quantum wells (CQWs) coupled with cholesteric liquid crystals (CLCs). The face-down CQWs assemblies with over 90% in-plane transition dipole moments enables directional emission along the liquid crystal helical axis within the

SUBMITTER: Liang X 

PROVIDER: S-EPMC12533290 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature