Achieving high circularly polarized red luminescence and photoluminescence quantum yield through chiral induction and energy transfer in F8BT-based systems

Circularly polarized luminescence (CPL) materials with both high photoluminescence quantum yield (PLQY) and large photoluminescence dissymmetry factor (g lum ) are essential for high-efficiency circularly polarized organic light-emitting diode (CP-OLED), because higher PLQY directly improves external quantum efficiency (EQE). However, achieving both high PLQY and strong CPL remains challenging. Here, we report a synergistic strategy combining chiral induction and energy transfer to simultaneously enhance g lum and PLQY in red-emissive systems based on the green achiral emitting conjugated polymer. By incorporating chiral inducers and doping the red-emitting energy acceptor, we realized efficient chiral induction and energy transfer, resulting in improved red CPL characteristics. The optimized systems exhibited a g lum of 0.26 at 615 nm and a PLQY exceeding 0.9, outperforming systems without chiral or energy transfer components. Our findings demonstrate an effective approach to enhancing CPL performance by integrating chiral induction and energy transfer strategies, without synthesizing new molecules.