Multiple resonance type thermally activated delayed fluorescence by dibenzo [1,4] azaborine derivatives

Jaehyun Bae, Mika Sakai, Youichi Tsuchiya, Naoki Ando, Xian Kai Chen, Thanh Ba Nguyen, Chin Yiu Chan, Yi Ting Lee, Morgan Auffray, Hajime Nakanotani, Shigehiro Yamaguchi, Chihaya Adachi

研究成果: ジャーナルへの寄稿学術誌査読

6 被引用数 (Scopus)

抄録

We studied the photophysical and electroluminescent (EL) characteristics of a series of azaborine derivatives having a pair of boron and nitrogen aimed at the multi-resonance (MR) effect. The computational study with the STEOM-DLPNO-CCSD method clarified that the combination of a BN ring-fusion and a terminal carbazole enhanced the MR effect and spin-orbit coupling matrix element (SOCME), simultaneously. Also, we clarified that the second triplet excited state (T2) plays an important role in efficient MR-based thermally activated delayed fluorescence (TADF). Furthermore, we obtained a blue–violet OLED with an external EL quantum efficiency (EQE) of 9.1%, implying the presence of a pronounced nonradiative decay path from the lowest triplet excited state (T1).

本文言語英語
論文番号990918
ジャーナルFrontiers in Chemistry
10
DOI
出版ステータス出版済み - 9月 19 2022

!!!All Science Journal Classification (ASJC) codes

  • 化学一般

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