Carbazole-Based DABNA Analogues as Highly Efficient Thermally Activated Delayed Fluorescence Materials for Narrowband Organic Light-Emitting Diodes

被引：196

作者：

Oda, Susumu ^{[1
]}

Kumano, Wataru ^{[1
]}

Hama, Toshiki ^{[1
]}

Kawasumi, Ryosuke ^{[2
]}

Yoshiura, Kazuki ^{[1
]}

Hatakeyama, Takuji ^{[1
]}

机构：

[1] Kwansei Gakuin Univ, Sch Sci & Technol, Dept Chem, 2-1 Gakuen, Sanda, Hyogo 6691337, Japan

[2] JNC Petrochem Corp, 5-1 Goi Kaigan, Ichihara, Chiba 2908551, Japan

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2021年 / 60卷 / 06期

基金：

日本科学技术振兴机构; 日本学术振兴会;

关键词：

borylation; carbazole; organic light-emitting diodes; organoboron; thermally activated delayed fluorescence; MOLECULAR DESIGN; PURE BLUE; BORON COMPLEXES; DONOR; EMITTERS; BORYLATION; STRATEGY; OLEDS;

D O I：

10.1002/anie.202012891

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Carbazole-based DABNA analogues (CzDABNAs) were synthesized from triarylamine by regioselective one-shot single and double borylation. The reaction proceeded selectively at the ortho position of the carbazolyl group, where the highest occupied molecular orbital is mainly localized owing to the difference in the electron-donating abilities of the diarylamino and carbazolyl groups. The facile and scalable method enabled synthesis of CzDABNAs, exhibiting narrowband thermally activated delayed fluorescence with emission spectra ranging from deep blue to green. The organic light-emitting diode devices employing these products as emitters exhibited deep-blue, sky-blue, and green emission with high external quantum efficiencies of 19.5, 21.8, and 26.7 %, respectively.

引用

页码：2882 / 2886

页数：5

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