Enabling Multicolor Circularly Polarized Organic Long Persistent Luminescence through Chiral Exciplex

Circularly polarized organic long persistent luminescence (CP-OLPL) has garnered significant attention due to its distinctive properties. However, achieving CP-OLPL materials with ultralong durations remains a formidable challenge. Herein, an effective strategy is proposed to obtain long-lived CP-OLPL by constructing a self-designed chiral donor for developing a host-guest chiral exciplex system. The gradual recombination of long-lived charge-separated states enables a green CP-OLPL emission to persist for over 1.5 hours with an asymmetry factor (|g_lum|) of 4.5 × 10^-3. More intriguingly, doping with rubrene fluorophore yields an orange-red CP-OLPL system, exhibiting a duration over 1 hour and |g_lum| of 2.3 × 10^-3 through synergistic singlet-singlet and chirality energy transfer. These properties render the development of chiral afterglow display, multi-level information encryption, and afterglow lighting. This work not only represents a significant advancement in the design of chiral donors for ultralong CP-OLPL exciplex system with durations but also provides valuable insights into exciton dynamics.