論文

査読有り
2019年11月22日

Pentacyclic Ladder-Heteraborin Emitters Exhibiting High-Efficiency Blue Thermally Activated Delayed Fluorescence with an Ultrashort Emission Lifetime

ACS Materials Letters
  • Agou, Tomohiro
  • ,
  • Matsuo, Kyohei
  • ,
  • Kawano, Rei
  • ,
  • Park, In Seob
  • ,
  • Hosoya, Takaaki
  • ,
  • Fukumoto, Hiroki
  • ,
  • Kubota, Toshio
  • ,
  • Mizuhata, Yoshiyuki
  • ,
  • Tokitoh, Norihiro
  • ,
  • Yasuda, Takuma

2
開始ページ
28
終了ページ
34
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1021/acsmaterialslett.9b00433
出版者・発行元
ACS

As one of the three primary colors, blue is significant for display and lighting applications and the development of blue-emitting molecules with high quantum efficiency, and color purity for organic light-emitting diodes (OLEDs) remains a key challenge. Herein, a new series of blue thermally activated delayed fluorescence (TADF) materials featuring π-extended ladder-oxaborin and thiaborin acceptors has been developed. Steady-state and time-resolved photophysical measurements revealed the advantages of the ladder-oxaborin emitter, including a tiny singlet–triplet energy splitting of 10 meV, an ideal photoluminescence quantum yield of 100%, and an ultrashort TADF lifetime of 780 ns. The TADF-OLEDs incorporating the ladder-oxaborin (deep-blue) and thiaborin (sky-blue) emitters achieved significantly high external electroluminescence quantum efficiencies of up to 20.1% and 25.9%, respectively, accompanied by suppressed efficiency roll-offs.

リンク情報
DOI
https://doi.org/10.1021/acsmaterialslett.9b00433
ID情報
  • DOI : 10.1021/acsmaterialslett.9b00433
  • ISSN : 2639-4979
  • ORCIDのPut Code : 65008742

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