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

Seiichiro Izawa; Masahiro Morimoto; Keisuke Fujimoto; Koki Banno; Yutaka Majima; Masaki Takahashi; Shigeki Naka; Masahiro Hiramoto

doi:https://doi.org/10.1038/s41467-023-41208-7

論文・著書情報

タイトル

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

著者

和文:	伊澤誠一郎, Masahiro Morimoto, Keisuke Fujimoto, Koki Banno, Yutaka Majima, Masaki Takahashi, Shigeki Naka, Masahiro Hiramoto.
英文:	Seiichiro Izawa, Masahiro Morimoto, Keisuke Fujimoto, Koki Banno, Yutaka Majima, Masaki Takahashi, Shigeki Naka, Masahiro Hiramoto.

言語

English

掲載誌/書名

和文:	Nature Communications
英文:	Nature Communications

巻, 号, ページ

出版年月

2023年9月20日

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英文:

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英文:

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公式リンク

http://dx.doi.org/10.1038/s41467-023-41208-7

DOI

https://doi.org/10.1038/s41467-023-41208-7

アブストラクト

AbstractAmong 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.

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