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A sky blue thermally activated delayed fluorescence emitter to achieve efficient white light emission through in situ metal complex formation

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Abstract

We developed two types of 2,6-pyrazine-based sky blue-to-green thermally activated delayed fluorescence (TADF) emitters, of which the green emitter helped realize high-performance organic light-emitting devices (OLEDs) with an external quantum efficiency (ηext) of over 20%, whereas the sky-blue emitter outperformed conventional fluorescent emitters with an ηext of over 10%. Moreover, this sky-blue emitter was able to form an in situ metal complex in the form of CuI(I) and it exhibited efficient white light emission with an ηext,max of 11%. To our best knowledge, this is the first report on TADF emitters realizing the in situ formation of a metal complex.

Graphical abstract: A sky blue thermally activated delayed fluorescence emitter to achieve efficient white light emission through in situ metal complex formation

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Publication details

The article was received on 30 Nov 2018, accepted on 14 Jan 2019 and first published on 23 Jan 2019


Article type: Communication
DOI: 10.1039/C8TC06041J
Citation: J. Mater. Chem. C, 2019, Advance Article

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    A sky blue thermally activated delayed fluorescence emitter to achieve efficient white light emission through in situ metal complex formation

    Y. Kato, H. Sasabe, Y. Hayasaka, Y. Watanabe, H. Arai and J. Kido, J. Mater. Chem. C, 2019, Advance Article , DOI: 10.1039/C8TC06041J

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