Aggregation-assisted energy gap modulation controls delayed emission in hybrid charge-transfer emitters
Kavya Vinod, Najuma Noushad, Hidetoshi Tanaka, Nitha Mohan, Yuya Kokado, Daiki Tomiya, Yasuhiro Kobori, Mahesh Hariharan
Abstract
, suppress RISC and stabilize triplet excitons, resulting in prominent RTP. Time-resolved spectroscopy and theoretical calculations reveal that the hybridization of local-excited and charge-transfer states mediates excited-state evolution, with J-aggregation promoting DF and H-aggregation favouring RTP. These results establish a direct link between aggregation and distinct photoluminescence pathways, offering a strategy to tune delayed emission in organic materials.
Topics & Concepts
PhosphorescenceCommon emitterCharge (physics)Singlet stateFluorescenceModulation (music)Energy transferAggregation-induced emissionOptoelectronicsBand gapPhotochemistryMaterials scienceChemistryChemical physicsAtomic physicsPhysicsOpticsExcited stateQuantum mechanicsAcousticsOrganic Light-Emitting Diodes ResearchLuminescence and Fluorescent MaterialsAdvanced biosensing and bioanalysis techniques