High-efficiency sky-blue organic light-emitting diodes utilizing thermally-activated delayed fluorescence

Yasuhide Hiraga, Jun Ichi Nishide, Hajime Nakanotani, Masaki Aonuma, Chihaya Adachi

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


A highly efficient sky-blue organic light-emitting diode (OLED) based on a thermally-activated delayed fluorescence (TADF) molecule, 1,2-bis(carbazol-9-yl)-4,5-dicyanobenzene (2CzPN), was studied. The sky-blue OLED exhibited a maximum external electroluminescence quantum efficiency (ηEQE) of over 24.0%. In addition, a white OLED using 2CzPN combined with green and orange TADF emitters showed a high ηEQE of 17.3% with a maximum power efficiency of 52.3 lm/W and Commission Internationale de l'Eclairage coordinates of (0.32, 0.43).

Original languageEnglish
Pages (from-to)971-976
Number of pages6
JournalIEICE Transactions on Electronics
Issue number10
Publication statusPublished - Oct 1 2015

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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