Efficient and stable sky-blue delayed fluorescence organic light-emitting diodes with CIE y below 0.4

Chin Yiu Chan, Masaki Tanaka, Hajime Nakanotani, Chihaya Adachi

研究成果: Contribution to journalArticle査読

63 被引用数 (Scopus)

抄録

Organic light-emitting diodes utilizing thermally activated delayed fluorescence is a potential solution for achieving stable blue devices. Sky-blue devices (CIE y < 0.4) with high stability and high external quantum efficiency (>15%) at 1000 cd m −2 based on either delayed fluorescence or phosphorescence are still limited and very hard to achieve simultaneously. Here, we report the design and synthesis of a new thermally activated delayed fluorescence emitter, 3Ph 2 CzCzBN. A sky-blue device based on 3Ph 2 CzCzBN exhibits a high external quantum efficiency of 16.6% at 1000 cd m −2 . The device shows a sky-blue electroluminescence of 482 nm and achieves Commission Internationale de l’ Eclairage coordinates of (0.17, 0.36). The sky-blue device exhibits a superb LT 90 of 38 h. This is the first demonstration of high-efficiency and stable sky-blue devices (CIE y < 0.4) based on delayed fluorescence, which represents an important advance in the field of blue organic light-emitting diode technology.

本文言語英語
論文番号5036
ジャーナルNature communications
9
1
DOI
出版ステータス出版済み - 12 1 2018

All Science Journal Classification (ASJC) codes

  • 化学 (全般)
  • 生化学、遺伝学、分子生物学(全般)
  • 物理学および天文学(全般)

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