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

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number5036
JournalNature communications
Volume9
Issue number1
DOIs
Publication statusPublished - Dec 1 2018

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Organic light emitting diodes (OLED)
sky
light emitting diodes
Fluorescence
Light
Equipment and Supplies
fluorescence
Phosphorescence
Electroluminescence
Quantum efficiency
Demonstrations
phosphorescence
electroluminescence
quantum efficiency
emitters
Technology
synthesis

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

Cite this

Efficient and stable sky-blue delayed fluorescence organic light-emitting diodes with CIE y below 0.4 . / Chan, Chin Yiu; Tanaka, Masaki; Nakanotani, Hajime; Adachi, Chihaya.

In: Nature communications, Vol. 9, No. 1, 5036, 01.12.2018.

Research output: Contribution to journalArticle

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