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

Engineering and Technology

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

S. Izawa, M. Morimoto, et al.

This groundbreaking research reveals an ultra-low voltage turn-on of just 1.47 V for blue emission in OLEDs, utilizing innovative methods like charge transfer states and triplet-triplet annihilation. Conducted by Seiichiro Izawa, Masahiro Morimoto, and their colleagues, this study is set to revolutionize the field of OLED technology.

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Playback language: English
Abstract
Developing blue emission in organic light-emitting diodes (OLEDs) is crucial yet challenging. This paper demonstrates an ultralow voltage turn-on at 1.47 V for blue emission (peak wavelength at 462 nm) in an OLED using a common blue-fluorescent emitter. This is achieved through selective excitation of low-energy triplet states at a low applied voltage, utilizing the charge transfer (CT) state as a precursor and triplet-triplet annihilation (TTA). The OLED reaches 100 cd/m² luminance at 1.97 V.
Publisher
Nature Communications
Published On
Sep 20, 2023
Authors
Seiichiro Izawa, Masahiro Morimoto, Keisuke Fujimoto, Koki Banno, Yutaka Majima, Masaki Takahashi, Shigeki Naka, Masahiro Hiramoto
Tags
OLED
blue emission
ultralow voltage
charge transfer
triplet-triplet annihilation
luminance

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