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High-efficiency organic light-emitting diodes with fluorescent emitters

Author

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  • Hajime Nakanotani

    (Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi
    Innovative Organic Device Laboratory, Institute of Systems, Information Technologies and Nanotechnologies (ISIT), 744 Motooka, Nishi)

  • Takahiro Higuchi

    (Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi)

  • Taro Furukawa

    (Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi)

  • Kensuke Masui

    (Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi
    Advanced Research Laboratories, Fujifilm Co., 577 Ushijima, Kaisei, Ashigarakami)

  • Kei Morimoto

    (Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi)

  • Masaki Numata

    (Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi)

  • Hiroyuki Tanaka

    (Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi)

  • Yuta Sagara

    (Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi)

  • Takuma Yasuda

    (Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi
    International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi)

  • Chihaya Adachi

    (Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi
    Innovative Organic Device Laboratory, Institute of Systems, Information Technologies and Nanotechnologies (ISIT), 744 Motooka, Nishi
    International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi)

Abstract

Fluorescence-based organic light-emitting diodes have continued to attract interest because of their long operational lifetimes, high colour purity of electroluminescence and potential to be manufactured at low cost in next-generation full-colour display and lighting applications. In fluorescent molecules, however, the exciton production efficiency is limited to 25% due to the deactivation of triplet excitons. Here we report fluorescence-based organic light-emitting diodes that realize external quantum efficiencies as high as 13.4–18% for blue, green, yellow and red emission, indicating that the exciton production efficiency reached nearly 100%. The high performance is enabled by utilization of thermally activated delayed fluorescence molecules as assistant dopants that permit efficient transfer of all electrically generated singlet and triplet excitons from the assistant dopants to the fluorescent emitters. Organic light-emitting diodes employing this exciton harvesting process provide freedom for the selection of emitters from a wide variety of conventional fluorescent molecules.

Suggested Citation

  • Hajime Nakanotani & Takahiro Higuchi & Taro Furukawa & Kensuke Masui & Kei Morimoto & Masaki Numata & Hiroyuki Tanaka & Yuta Sagara & Takuma Yasuda & Chihaya Adachi, 2014. "High-efficiency organic light-emitting diodes with fluorescent emitters," Nature Communications, Nature, vol. 5(1), pages 1-7, September.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms5016
    DOI: 10.1038/ncomms5016
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    Cited by:

    1. Pode, Ramchandra, 2020. "Organic light emitting diode devices: An energy efficient solid state lighting for applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 133(C).

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