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Issue 86, 2019
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Chromenopyrazole-based bipolar host materials for solution-processable thermally activated delayed fluorescence OLEDs exhibiting high efficiency and low roll-off

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Abstract

This study reports the design, synthesis, and characterization of two new bipolar host materials, DCzCP and TCzCP. Both materials were implemented as hosts by doping a known green thermally activated delayed fluorescent (TADF) emitter (t4CzIPN) in solution-processable OLEDs. DCzCP-based devices afford the best performance with the maximum external quantum efficiency (EQE) of 21.2%. Notably, the EQE was maintained at 20.7% and 19.7% at a practical luminance of 500 cd m−2 and 1000 cd m−2, respectively, demonstrating very small roll-off.

Graphical abstract: Chromenopyrazole-based bipolar host materials for solution-processable thermally activated delayed fluorescence OLEDs exhibiting high efficiency and low roll-off

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Publication details

The article was received on 01 Aug 2019, accepted on 01 Oct 2019 and first published on 02 Oct 2019


Article type: Communication
DOI: 10.1039/C9CC05983K
Chem. Commun., 2019,55, 12952-12955

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    Chromenopyrazole-based bipolar host materials for solution-processable thermally activated delayed fluorescence OLEDs exhibiting high efficiency and low roll-off

    M. Godumala, J. Yoon, C. Lee, J. Jeong, S. Park, H. Y. Woo, M. J. Cho and D. H. Choi, Chem. Commun., 2019, 55, 12952
    DOI: 10.1039/C9CC05983K

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