Solution-processed AIEgen NIR OLEDs with EQE Approaching 15 .
Angew Chem Int Ed Engl
; 61(26): e202204279, 2022 Jun 27.
Article
em En
| MEDLINE
| ID: mdl-35393763
ABSTRACT
Organic near-infrared (NIR) luminogens have attracted intensive attention considering their vast potential applications in areas like bioimaging, organic light-emitting diodes (OLEDs) and night-vision telecommunication. However, organic NIR luminogens with high solid quantum efficiencies are scarce, limiting their applications. Here, we reported an electron-deficient acceptor, BSM, based on dithiafulvalene and benzothiadiazole, which could work as a strong acceptor to produce highly efficient NIR emitters with aggregation-induced emission (AIE) property. One of the AIEgens, TBSMCN emitted at 820â
nm with a solid quantum yield of 10.7 %. When applied to solution-processed OLEDs, an outstanding external quantum efficiency (EQE) of 9.4 % was achieved with a peak wavelength at 728â
nm. Moreover, its non-doped device could achieve an extraordinary EQE of 2.2 % peaking at 804â
nm. In the further optimized configuration, when an extra sensitizer was added to harvest triplet excitons, the EQE unprecedentedly soared up to 14.3 % with a peak wavelength of 750â
nm.
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1
Base de dados:
MEDLINE
Idioma:
En
Revista:
Angew Chem Int Ed Engl
Ano de publicação:
2022
Tipo de documento:
Article
País de afiliação:
China