Benzimidazobenzothiazole-Based Bipolar Hosts to Harvest Nearly All of the Excitons from Blue Delayed Fluorescence and Phosphorescent Organic Light-Emitting Diodes

Lin Song Cui, Jong Uk Kim, Hiroko Nomura, Hajime Nakanotani, Chihaya Adachi

研究成果: Contribution to journalArticle査読

95 被引用数 (Scopus)

抄録

Much effort has been devoted to developing highly efficient organic light-emitting diodes (OLEDs) that function through phosphorescence or thermally activated delayed fluorescence (TADF). However, efficient host materials for blue TADF and phosphorescent guest emitters are limited because of their requirement of high triplet energy levels. Herein, we report the rigid acceptor unit benzimidazobenzothiazole (BID-BT), which is suitable for use in bipolar hosts in blue OLEDs. The designed host materials, based on BID-BT, possess high triplet energy and bipolar carrier transport ability. Both blue TADF and phosphorescent OLEDs containing BID-BT-based derivatives exhibit external quantum efficiencies as high as 20 %, indicating that these hosts allow efficient triplet exciton confinement appropriate for blue TADF and phosphorescent guest emitters. Gotta catch them all: Over 20 % external quantum efficiencies were achieved in both blue thermally activated delayed fluorescence (TADF) and phosphorescent organic light-emitting diodes (OLEDs) using benzimidazobenzothiazole bipolar host materials.

本文言語英語
ページ(範囲)6864-6868
ページ数5
ジャーナルAngewandte Chemie - International Edition
55
24
DOI
出版ステータス出版済み - 6 6 2016

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

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