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Multiple resonance type thermally activated delayed fluorescence by dibenzo [1,4] azaborine derivatives.
Bae, Jaehyun; Sakai, Mika; Tsuchiya, Youichi; Ando, Naoki; Chen, Xian-Kai; Nguyen, Thanh Ba; Chan, Chin-Yiu; Lee, Yi-Ting; Auffray, Morgan; Nakanotani, Hajime; Yamaguchi, Shigehiro; Adachi, Chihaya.
Afiliação
  • Bae J; Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Fukuoka, Japan.
  • Sakai M; Department of Chemistry and Biochemistry, Kyushu University, Fukuoka, Japan.
  • Tsuchiya Y; Department of Chemistry, Graduate School of Science, Nagoya University, Nagoya, Japan.
  • Ando N; Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Fukuoka, Japan.
  • Chen XK; Department of Chemistry, Graduate School of Science, Nagoya University, Nagoya, Japan.
  • Nguyen TB; Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Fukuoka, Japan.
  • Chan CY; Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Fukuoka, Japan.
  • Lee YT; Department of Chemistry and Biochemistry, Kyushu University, Fukuoka, Japan.
  • Auffray M; Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Fukuoka, Japan.
  • Nakanotani H; Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Fukuoka, Japan.
  • Yamaguchi S; Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Fukuoka, Japan.
  • Adachi C; Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Fukuoka, Japan.
Front Chem ; 10: 990918, 2022.
Article em En | MEDLINE | ID: mdl-36199661
ABSTRACT
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).
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2022 Tipo de documento: Article
Texto completo
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2022 Tipo de documento: Article