Enabling Multicolor Circularly Polarized Organic Long Persistent Luminescence through Chiral Exciplex.
basic_science · Level V
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- Record sourced from PubMed, PMID 40166842.
- Also identified by DOI 10.1002/adma.202500841.
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Abstract
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<sub>lum</sub>|) of 4.5 × 10<sup>-3</sup>. More intriguingly, doping with rubrene fluorophore yields an orange-red CP-OLPL system, exhibiting a duration over 1 hour and |g<sub>lum</sub>| of 2.3 × 10<sup>-3</sup> 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.