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

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

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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.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Chemistry, Biochemistry and Pharmaceutical Sciences (DCBP)

UniBE Contributor:

Decurtins, Silvio and Liu, Shi-Xia

Subjects:

500 Science > 570 Life sciences; biology
500 Science > 540 Chemistry

ISSN:

2296-2646

Publisher:

Frontiers Media

Language:

English

Submitter:

Shi-Xia Liu

Date Deposited:

22 Jul 2021 08:24

Last Modified:

22 Jul 2021 08:24

Publisher DOI:

10.3389/fchem.2021.721272

BORIS DOI:

10.48350/157680

URI:

https://boris.unibe.ch/id/eprint/157680

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