Significant Enhancement of Blue OLED Performances through Molecular Engineering of Pyrimidine-Based Emitter

Kohei Nakao, Hisahiro Sasabe, Ryutaro Komatsu, Yuya Hayasaka, Tatsuya Ohsawa, Junji Kido

Research output: Contribution to journalArticlepeer-review

55 Citations (Scopus)

Abstract

Although pyrimidine-based emitters are one of the most promising classes of compounds, a structure–property relationship for an effective molecular design strategy has not yet been elucidated. In this study, the authors develop three types of blue pyrimidine emitters for high-performance thermally activated delayed fluorescence (TADF) organic light-emitting devices (OLEDs). 2,4,6-triphenylpyrimidine is used as an acceptor, and tri- or penta-substituted acridine as a donor unit for the blue TADF emitters. The authors investigate the effects of the nitrogen position on the photophysical properties and OLED performances, and develop a blue device with a high external quantum efficiency close to 25%. The device performances are among the best so far for blue TADF OLEDs.

Original languageEnglish
Article number1600843
JournalAdvanced Optical Materials
Volume5
Issue number6
DOIs
Publication statusPublished - Mar 17 2017
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

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