Achieving Hour-Long Organic Afterglow in Donor-Sensitizer-Acceptor System via Molecular Engineering of Sensitizers
Yunlong Zou , Ting Luo , Guangming Wang , Na Zhang , Kaka Zhang
Chinese Journal of Chemistry ›› 2026, Vol. 44 ›› Issue (11) : 1735 -1742.
The development of pure organic long persistent luminescence (OLPL) materials with hour-scale duration remains a formidable challenge, as their design principles are still elusive. Building upon our donor-sensitizer-acceptor (DSA) system, herein, we report the achievement of hour-long OLPL by engineering the molecular structure of the sensitizer. We designed three difluoroboron β-diketonate (BF₂bdk) sensitizers featuring biphenyl-derived motifs with incremental modifications. All corresponding three-component systems exhibited significant room-temperature OLPL with remarkable afterglow durations exceeding 2 h under ambient conditions. This work demonstrates the successful realization of hour-scale OLPL within the DSA system and underscores the pivotal role of sensitizer molecular design in enabling ultralong organic afterglow, providing a clear design blueprint for future materials.
Organic afterglow / Organic long persistent luminescence / Donor-sensitizer-acceptor / Difluoroboron β-diketonate / Room-temperature phosphorescence / Charge separation / Charge recombination / Biphenyl moiety
2026 SIOC, CAS, Shanghai, & WILEY-VCH GmbH
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