Deep Trap Management in Organic Persistent Luminescence for Multi‐Mode Optical Information Storage

Abstract The global data explosion has heightened the demand for advanced optoelectronic information storage technologies but developing multidimensional and deep‐trap persistent luminescence (PersL) in organic storage media remains a significant challenge. Herein, donor‐acceptor‐donor wedge‐shape thermally activated delayed fluorescence emitter 2,5‐bis(4‐(diphenylamino)phenyl)‐7‐oxo‐7 H ‐benzo[ de ]benzo[4,5]imidazo[2,1‐ a ] isoquinoline‐10,11‐dicarbonitrile (TCN) is designed for PersL host/guest system, enabling multi‐mode excitation and stimulation forms, ≈0.72 eV deep trap depth, 6.1% aggregation‐induced quenching effect. UV, visible light (425–630 nm), and X‐ray efficiently triggered deep traps with nearly identical depth values, deviating less than 0.04 eV from density functional theory calculations. The thermoluminescence peak T m at 385 K (heating rate at 50 K min −1 ), coupled with near‐infrared (NIR) stimulation wavelengths extending to 1300 nm, greatly exceeds room temperature storage capacities, ensuring consistent intensity for over 1 month of information retention. The multi‐mode optical information storage and retrieval capability of this PersL media extended its application scope to include blue‐laser direct writing, X‐ray time‐lapse imaging, and NIR electronic signatures. This study on deep‐trap PersL storage media significantly advances the understanding of molecular design and luminescent mechanisms in organic semiconductors, with broad implications for enhancing their energy storage applications in diverse scenarios.