• • Achieved |g_EL| up to 1.9 and EQE up to 26.9% simultaneously, yielding a Q-factor of 0.48, the highest comprehensive performance reported for CP-OLEDs to date.
• • Contrary to conventional expectations, integrating N*-LC layers did not induce >50% optical losses; EQE was preserved via an internal photon-recycling mechanism, enabling high efficiency without bulky external optics.
• • The composite strategy is general for full-color CP-OLEDs, as it decouples chirality from the emitter, allowing use of achiral emitters with high intrinsic efficiency.
• • Demonstrated practical application in information encryption and decryption using circularly polarized electroluminescence, showcasing potential for secure optical communication.