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Blue organic light-emitting diode with a turn-on voltage of 1.47 V

Author

Listed:
  • Seiichiro Izawa

    (Tokyo Institute of Technology
    Osaka University
    Japan Science and Technology Agency (JST))

  • Masahiro Morimoto

    (University of Toyama)

  • Keisuke Fujimoto

    (Shizuoka University)

  • Koki Banno

    (Shizuoka University)

  • Yutaka Majima

    (Tokyo Institute of Technology)

  • Masaki Takahashi

    (Shizuoka University)

  • Shigeki Naka

    (University of Toyama)

  • Masahiro Hiramoto

    (Institute for Molecular Science)

Abstract

Among the three primary colors, blue emission in organic light-emitting diodes (OLEDs) are highly important but very difficult to develop. OLEDs have already been commercialized; however, blue OLEDs have the problem of requiring a high applied voltage due to the high-energy of blue emission. Herein, an ultralow voltage turn-on at 1.47 V for blue emission with a peak wavelength at 462 nm (2.68 eV) is demonstrated in an OLED device with a typical blue-fluorescent emitter that is widely utilized in a commercial display. This OLED reaches 100 cd/m2, which is equivalent to the luminance of a typical commercial display, at 1.97 V. Blue emission from the OLED is achieved by the selective excitation of the low-energy triplet states at a low applied voltage by using the charge transfer (CT) state as a precursor and triplet-triplet annihilation, which forms one emissive singlet from two triplet excitons.

Suggested Citation

  • Seiichiro Izawa & Masahiro Morimoto & Keisuke Fujimoto & Koki Banno & Yutaka Majima & Masaki Takahashi & Shigeki Naka & Masahiro Hiramoto, 2023. "Blue organic light-emitting diode with a turn-on voltage of 1.47 V," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-41208-7
    DOI: 10.1038/s41467-023-41208-7
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    2. Sebastian Engmann & Adam J. Barito & Emily G. Bittle & Noel C. Giebink & Lee J. Richter & David J. Gundlach, 2019. "Higher order effects in organic LEDs with sub-bandgap turn-on," Nature Communications, Nature, vol. 10(1), pages 1-10, December.
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