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Efficient and stable sky-blue delayed fluorescence organic light-emitting diodes with CIEy below 0.4

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  • Chin-Yiu Chan

    (Kyushu University)

  • Masaki Tanaka

    (Kyushu University)

  • Hajime Nakanotani

    (Kyushu University)

  • Chihaya Adachi

    (Kyushu University
    Kyushu University)

Abstract

Organic light-emitting diodes utilizing thermally activated delayed fluorescence is a potential solution for achieving stable blue devices. Sky-blue devices (CIEy 15%) at 1000 cd m−2 based on either delayed fluorescence or phosphorescence are still limited and very hard to achieve simultaneously. Here, we report the design and synthesis of a new thermally activated delayed fluorescence emitter, 3Ph2CzCzBN. A sky-blue device based on 3Ph2CzCzBN exhibits a high external quantum efficiency of 16.6% at 1000 cd m−2. The device shows a sky-blue electroluminescence of 482 nm and achieves Commission Internationale de l’ Eclairage coordinates of (0.17, 0.36). The sky-blue device exhibits a superb LT90 of 38 h. This is the first demonstration of high-efficiency and stable sky-blue devices (CIEy

Suggested Citation

  • Chin-Yiu Chan & Masaki Tanaka & Hajime Nakanotani & Chihaya Adachi, 2018. "Efficient and stable sky-blue delayed fluorescence organic light-emitting diodes with CIEy below 0.4," Nature Communications, Nature, vol. 9(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-07482-6
    DOI: 10.1038/s41467-018-07482-6
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