Highly Dissymmetric and Multicolor Circularly Polarized Organic Hyperafterglow

ABSTRACT Circularly polarized organic afterglow (CPOA) materials have garnered considerable interest for their potential in information encryption, 3D displays, and sensing technologies. However, realizing CPOA materials that simultaneously offer high efficiency, long lifetime, high color purity, and large dissymmetry factor ( g lum ) remains a significant challenge. Herein, an effective CP‐hyperafterglow design strategy that rationally integrates narrowband hyperafterglow polymers with cholesteric liquid crystal matrices is proposed. The resulting polymeric films deliver multicolor narrowband CP‐hyperafterglow emission with high photoluminescence quantum yields of up to 81%, emission bandwidths as narrow as ∼40 nm, ultralong lifetimes reaching 957 s, and maximum | g lum | values of up to 1.3. Benefiting from these photophysical merits, various applications, including information encoding, multilevel encryption, and chiral display, are demonstrated. These findings offer a simple and reliable route toward high‐performance CP‐hyperafterglow, advancing the development of chiral optoelectronic materials and applications.