Strong Circularly Polarized Electroluminescence Promoted by Using Chiral Co‐Assembled Liquid Crystal Polymers

Abstract Achieving high circularly polarized electroluminescence (CP‐EL) performance in organic light‐emitting diodes (OLEDs) remains a significant challenge. In this study, chiral nematic liquid crystal polymers (LCPs) are co‐assembled as chiral fluorescent materials by doping 1 wt% chiral binaphthyl‐based R/S‐D inducers into a LCP (P‐PyP), displaying blue circularly polarized luminescence (CPL) signals (|g_lum| = 0.025, λ_em = 470 nm, Φ_FL = 37%) after thermal annealing at 140 °C. Notably, the resulting chiral LCP films can serve as the emitting layer (EML) in non‐doped OLEDs, and exhibit good CP‐EL emissions (g_EL = −0.019/+0.015, λ_EL = 484 nm). This work demonstrates a pathway for the high CP‐EL performance materials through the chiral co‐assembly of LCPs.