Hot-exciton harvesting via through-space single-molecule based white-light emission and optical waveguides.

ABSTRACT: Through-space donor-alkyl bridge-acceptor (D-σ-A) luminogens are developed as new organic single-molecule white light emitters (OSMWLEs) involving multiple higher lying singlet (S _n ) and triplet (T _m ) states (hot-excitons). Experimental and theoretical results confirm the origin of white light emission due to the co-existence of prompt fluorescence from locally excited states, thermally activated delayed fluorescence (TADF), and fast/slow dual phosphorescence color mixing simultaneously. Notably, the fast phosphorescence was observed due to trace amounts of isomeric impurities from commercial carbazole, while H-/J-aggregation resulted in slow phosphorescence. Crystal structure-packing-property analysis revealed that the alkyl chain length induced supra

SUBMITTER: Barman D 

PROVIDER: S-EPMC9365089 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature