Unique Solid-State Emission Behavior of Aromatic Difluoroboronated β-Diketones as an Emitter in Organic Light-Emitting Devices

Hisahiro Sasabe, Kanako Sasaki, Michitaka Mamiya, Yurie Suwa, Taiki Watanabe, Natsuki Onuma, Kohei Nakao, Minoru Yamaji, Junji Kido

研究成果: ジャーナルへの寄稿学術誌査読

12 被引用数 (Scopus)

抄録

Aromatic difluoroboronated β-diketone (BF2DK) derivatives are a widely known class of luminescent organic materials that exhibit high photoluminescent quantum efficiency and unique aggregation-dependent fluorescence behavior. However, there have been only a few reports on their use in solid-state electronic devices, such as organic light-emitting devices (OLEDs). Herein, we investigated the solid-state properties and OLED performance of a series of π-extended BF2DK derivatives that have previously been shown to exhibit intense fluorescence in the solution state. The BF2DK derivatives formed exciplexes with a carbazole derivative and exhibited thermally activated delayed fluorescence (TADF) behavior to give orange electroluminescence with a peak external quantum efficiency of 10 % that apparently exceeds the theoretical efficiency limit of conventional fluorescent OLEDs (7.5 %), assuming a light out-coupling factor of 30 %.

本文言語英語
ページ(範囲)2299-2303
ページ数5
ジャーナルChemistry - An Asian Journal
12
17
DOI
出版ステータス出版済み - 9月 5 2017
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 生化学
  • 有機化学

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