Safeguarding long-lived excitons from excimer traps in H-aggregated dye-assemblies.
Journal
Chemical science
ISSN: 2041-6520
Titre abrégé: Chem Sci
Pays: England
ID NLM: 101545951
Informations de publication
Date de publication:
14 Jun 2020
14 Jun 2020
Historique:
received:
29
03
2020
accepted:
14
05
2020
entrez:
3
9
2020
pubmed:
3
9
2020
medline:
3
9
2020
Statut:
epublish
Résumé
The fate of perylene bisimide (PBI) H-aggregates as energy-harvesting materials depends on the ability to circumvent an extremely deleterious but efficient self-trapping process that scavenges the long-lived excitons to form deep excimeric traps. We present the first ever report of an ambient-stable, bright, steady-state photoluminescence (PL) from the long-lived exciton of an H-aggregated PBI crystal. The crystal structure reveals a rotationally displaced H-aggregated arrangement of PBI chromophores, in which transition from the lowest energy exciton state is partially allowed. Polarized absorption spectroscopy on single microcrystals confirms an unusually large exciton splitting of ∼1265 cm
Identifiants
pubmed: 32874507
doi: 10.1039/d0sc01784a
pii: d0sc01784a
pmc: PMC7441499
doi:
Types de publication
Journal Article
Langues
eng
Pagination
5710-5715Informations de copyright
This journal is © The Royal Society of Chemistry 2020.
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