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Realization of high-efficiency fluorescent organic light-emitting diodes with low driving voltage

Author

Listed:
  • Amin Salehi

    (North Carolina State University)

  • Chen Dong

    (North Carolina State University)

  • Dong-Hun Shin

    (North Carolina State University)

  • Liping Zhu

    (North Carolina State University)

  • Christopher Papa

    (North Carolina State University)

  • Anh Thy Bui

    (North Carolina State University)

  • Felix N. Castellano

    (North Carolina State University)

  • Franky So

    (North Carolina State University)

Abstract

It is commonly accepted that a full bandgap voltage is required to achieving efficient electroluminescence (EL) in organic light-emitting diodes. In this work, we demonstrated organic molecules with a large singlet-triplet splitting can achieve efficient EL at voltages below the bandgap voltage. The EL originates from delayed fluorescence due to triplet fusion. Finally, in spite of a lower quantum efficiency, a blue fluorescent organic light-emitting diode having a power efficiency higher than some of the best thermally activated delayed fluorescent and phosphorescent blue organic light-emitting diodes is demonstrated. The current findings suggest that leveraging triplet fusion from purely organic molecules in organic light-emitting diode materials offers an alternative route to achieve stable and high efficiency blue organic light-emitting diodes.

Suggested Citation

  • Amin Salehi & Chen Dong & Dong-Hun Shin & Liping Zhu & Christopher Papa & Anh Thy Bui & Felix N. Castellano & Franky So, 2019. "Realization of high-efficiency fluorescent organic light-emitting diodes with low driving voltage," Nature Communications, Nature, vol. 10(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-10260-7
    DOI: 10.1038/s41467-019-10260-7
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