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Bis(Triphenylamine)Benzodifuran Chromophores: Synthesis, Electronic Properties and Application in Organic Light-Emitting Diodes

Authors :
Li, Hui
Komatsu, Ryutaro
Hankache, Jihane
Sasabe, Hisahiro
Lawson Daku, Latevi Max
Özen, Bilal
Chen, Songjie
Hauser, Jürg
Hauser, Andreas
Decurtins, Silvio
Kido, Junji
Liu, Shi-Xia
Source :
Frontiers in Chemistry, Li, Hui; Komatsu, Ryutaro; Hankache, Jihane; Sasabe, Hisahiro; Lawson Daku, Latevi Max; Özen, Bilal; Chen, Songjie; Hauser, Jürg; Hauser, Andreas; Decurtins, Silvio; Kido, Junji; Liu, Shi-Xia (2021). Bis(Triphenylamine)Benzodifuran Chromophores: Synthesis, Electronic Properties and Application in Organic Light-Emitting Diodes. Frontiers in Chemistry, 9(571) Frontiers Media 10.3389/fchem.2021.721272 , Frontiers in Chemistry, Vol 9 (2021)
Publication Year :
2021

Abstract

A series of bis(triphenylamine)benzodifuran chromophores have been synthesized and fully characterised. Starting from suitably functionalized benzodifuran (BDF) precursors, two triphenylamine (TPA) moieties are symmetrically coupled to a central BDF unit either at 4,8-positions through double bonds (1) and single bonds (2) respectively, or at 2,6-positions through double bonds (3). Their electronic absorption and photoluminescence properties as well as redox behaviour have been investigated in detail, indicating that the π-extended conjugation via vinyl linkers in 1 and 3 leads to comparatively strong electronic interactions between the relevant redox moieties TPA and BDF. Due to intriguing electronic properties and structural planarity, 3a has been applied as a dopant emitter in organic light-emitting diodes. A yellowish-green OLED exhibits a high external quantum efficiency (EQE) of 6.2%, thus exceeding the theoretical upper limit most likely due to energy transfer from an interface exciplex to an emissive layer and/or favorable horizontal orientation.

Details

ISSN :
22962646
Volume :
9
Database :
OpenAIRE
Journal :
Frontiers in chemistry
Accession number :
edsair.doi.dedup.....b266b973cb884db96340581fca7d1e9e
Full Text :
https://doi.org/10.3389/fchem.2021.721272