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Issue 16, 2019
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Boosting photoluminescence quantum yields of triarylboron/phenoxazine hybrids via incorporation of cyano groups and their applications as TADF emitters for high-performance solution-processed OLEDs

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Abstract

Cyano groups were introduced into the triarylboron/phenoxazine hybrids, and the resulting emitters not only exhibited distinct thermally activated delayed fluorescence (TADF) characteristics but also achieved a remarkable improvement in the photoluminescence quantum yields (PLQYs). The PLQYs of TB-1PXZ2CN and TB-2PXZ1CN are 0.67 and 0.75, which are 5.6 and 1.6 times higher than those of the respective non-cyano counterparts. Employing the two TADF emitters in solution-processed organic light-emitting diodes external quantum efficiencies (EQEs) of 9.7% and 11.4%, respectively, were achieved. Notably, the EQEs remained as high as 8.9% and 10.2% at a luminance of 2000 cd m−2 with slight efficiency roll-offs of 8% and 11%, respectively.

Graphical abstract: Boosting photoluminescence quantum yields of triarylboron/phenoxazine hybrids via incorporation of cyano groups and their applications as TADF emitters for high-performance solution-processed OLEDs

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Publication details

The article was received on 28 Jan 2019, accepted on 20 Mar 2019 and first published on 21 Mar 2019


Article type: Paper
DOI: 10.1039/C9TC00538B
Citation: J. Mater. Chem. C, 2019,7, 4778-4783

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    Boosting photoluminescence quantum yields of triarylboron/phenoxazine hybrids via incorporation of cyano groups and their applications as TADF emitters for high-performance solution-processed OLEDs

    Y. Liu, H. Huang, T. Zhou, K. Wu, M. Zhu, J. Yu, G. Xie and C. Yang, J. Mater. Chem. C, 2019, 7, 4778
    DOI: 10.1039/C9TC00538B

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