Boosting purely organic room-temperature phosphorescence performance through a host-guest strategy.
Chem Sci
; 12(40): 13580-13587, 2021 Oct 20.
Article
em En
| MEDLINE
| ID: mdl-34777778
ABSTRACT
The host-guest doping system has aroused great attention due to its promising advantage in stimulating bright and persistent room-temperature phosphorescence (RTP). Currently, exploration of the explicit structure-property relationship of bicomponent systems has encountered obstacles. In this work, two sets of heterocyclic isomers showing promising RTP emissions in the solid state were designed and synthesized. By encapsulating these phosphors into a robust phosphorus-containing host, several host-guest cocrystalline systems were further developed, achieving highly efficient RTP performance with a phosphorescence quantum efficiency (Ï P) of â¼26% and lifetime (τ P) of â¼32 ms. Detailed photophysical characterization and molecular dynamics (MD) simulation were conducted to reveal the structure-property relationships in such bicomponent systems. It was verified that other than restricting the molecular configuration, the host matrix could also dilute the guest to avoid concentration quenching and provide an external heavy atom effect for the population of triplet excitons, thus boosting the RTP performance of the guest.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Chem Sci
Ano de publicação:
2021
Tipo de documento:
Article