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Efficient near-infrared organic light-emitting diodes based on a bipolar host

Abstract

The donor/acceptor (D/A) type π-conjugated molecule has superior characteristic which can be easily tuned. Herein, a D-A type host material 5-(4-(diphenylamino)phenyl)acenaphthylene-1,2-dione (ADO-TPA) was designed and synthesized with diphenylamino as the hole-transporting unit and acenaphthylene-1,2-dione as the electron-transporting unit within the molecule for the fabrication of near-infrared (NIR) organic light-emitting diodes (OLEDs). The thermal, photophysical and electrochemical properties of ADO-TPA were systematically investigated and the new host showed a bipolar behavior. Significantly, the low turn on voltage of 3 V is achieved because of the narrow bandgap of ADO-TPA about 2.14 eV. In particular, the device with 20 wt% of 3,4-bis(4-(diphenylamino)phenyl)acenaphtho[1,2-b]pyrazine-8,9-dicarbonitrile (APDC-DTPA) doped into ADO-TPA host exhibited a maximum external quantum efficiency (EQE) of 2.7% with an emission peak of 735 nm.

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Publication details

The article was received on 23 Oct 2017, accepted on 09 Jan 2018 and first published on 10 Jan 2018


Article type: Paper
DOI: 10.1039/C7TC04843B
Citation: J. Mater. Chem. C, 2018, Accepted Manuscript
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    Efficient near-infrared organic light-emitting diodes based on a bipolar host

    Y. Hu, Y. Yuan, Y. Shi, J. Lin, Z. Jiang and L. Liao, J. Mater. Chem. C, 2018, Accepted Manuscript , DOI: 10.1039/C7TC04843B

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