Intrinsically Luminescent Nematic Liquid Crystals Enabling High‐Brightness Full‐Color and White Circularly Polarized Luminescence via Chiral Coassembly

Abstract

Abstract Circularly polarized luminescence (CPL) materials with simultaneous high dissymmetry factor ( g lum ) and brightness are pivotal for advanced photonic applications but remain challenging due to inherent trade‐offs betwwen g lum value and photoluminescenc quantum yield (PLQY). Here, we report a supramolecular engineering strategy to construct intrinsically luminescent chiral nematic liquid crystal (N*‐LC) films via coassembly of luminescent liquid crystals (LLCs) and chiral dopant. First, five intrinsic LLCs molecules ( 2PFQ , 2PFBQ , 2PFB , 2PFSe , and 2PFS ) were synthesized by combining the biphenyl framework with dioctyl‐functionalized fluorene, achieving exceptional nematic phases and high brightness with PLQY up to 99%. Then, chiral coassembly of the obtained LLCs with chiral dopants ( P / M‐ THH ) followed by rapid thermal quenching yielded Bragg reflection‐free N*‐LC films exhibiting high‐brightness CPL with recorded g lum values (up to 0.75) and PLQY (up to 71%). Full‐color tunability and white CPL (CIE: 0.33, 0.33) were realized through precise compositional control. The simultaneous optimization of g lum and PLQY enables high‐brightness CPL with advanced anticounterfeiting capabilities, opening new avenues for developing high‐brighness CPL materials for polarized photonic and optoelectronic applications.