Triarylboron-Based Fluorescent Organic Light-Emitting Diodes with External Quantum Efficiencies Exceeding 20 %

被引：277

作者：

Suzuki, Katsuaki ^{[1
]}

Kubo, Shosei ^{[1
]}

Shizu, Katsuyuki ^{[1
]}

Fukushima, Tatsuya ^{[1
]}

Wakamiya, Atsushi ^{[1
]}

Murata, Yasujiro ^{[1
]}

Adachi, Chihaya ^{[2
,3
]}

Kaji, Hironori ^{[1
]}

机构：

[1] Kyoto Univ, Inst Chem Res, Uji, Kyoto 6110011, Japan

[2] Kyushu Univ, Ctr Organ Photon & Elect Res, Nishi Ku, Fukuoka 8190395, Japan

[3] Japan Sci & Technol Agcy JST, Exploratory Res Adv Technol ERATO, Adachi Mol Exciton Engn Project, Fukuoka 8190395, Japan

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2015年 / 54卷 / 50期

关键词：

boron; donor-acceptor systems; electroluminescence; fluorescence; organic light-emitting diodes; ACTIVATED DELAYED FLUORESCENCE; 3-COORDINATE ORGANOBORON COMPOUNDS; AMORPHOUS MOLECULAR MATERIALS; PT(II) COMPOUNDS; BLUE; ELECTROLUMINESCENCE; PHOSPHORESCENCE; APPROXIMATION;

D O I：

10.1002/anie.201508270

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Triarylboron compounds have attracted much attention, and found wide use as functional materials because of their electron-accepting properties arising from the vacant p orbitals on the boron atoms. In this study, we design and synthesize new donor-acceptor triarylboron emitters that show thermally activated delayed fluorescence. These emitters display sky-blue to green emission and high photoluminescence quantum yields of 87-100% in host matrices. Organic light-emitting diodes using these emitting molecules as dopants exhibit high external quantum efficiencies of 14.0-22.8%, which originate from efficient up-conversion from triplet to singlet states and subsequent efficient radiative decay from singlet to ground states.

引用

页码：15231 / 15235

页数：5

共 49 条

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