Multi-Resonance Induced Thermally Activated Delayed Fluorophores for Narrowband Green OLEDs

被引：447

作者：

Zhang, Yuewei ^{[1
]}

Zhang, Dongdong ^{[1
]}

Wei, Jinbei ^{[2
]}

Liu, Ziyang ^{[1
]}

Lu, Yang ^{[1
]}

Duan, Lian ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Chem, Key Lab Organ Optoelect & Mol Engn, Minist Educ, Beijing 100084, Peoples R China

[2] Jilin Univ, Coll Chem, State Key Lab Supramol Struct & Mat, 2699 Qianjin Ave, Changchun 130012, Jilin, Peoples R China

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2019年 / 58卷 / 47期

基金：

中国博士后科学基金;

关键词：

delayed fluorescence; full width at half maximum; green emitters; multi-resonance; thermal activation; LIGHT-EMITTING-DIODES; FLUORESCENCE EMITTERS; EFFICIENCY; BORYLATION; EMISSION;

D O I：

10.1002/anie.201911266

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

High-color-purity emissions with small a full-width at half-maximum (FWHM) are an ongoing pursuit for high-resolution displays. Though the flourishment of narrow-band emissive materials with multi-resonance induced thermally activated delayed fluorescence (MR-TADF) in the blue region, such materials have not validated their potential in other color regions. By amplifying the influence of skeleton and peripheral units, a series of highly efficient green-emitting MR-TADF materials are firstly reported. Peripheral units with electron-deficit properties can significantly narrow the energy gap for bathochromic emission without compromising the color fidelity. MR-TADF emitters with photo-luminance quantum yields of above 90 % with FWHMs of <= 25 nm are developed. The corresponding organic light-emitting diodes show maximum external quantum efficiency/ power efficiency of 22.02 %/ 69.82 lm W-1 with excellent long-term stability.

引用

页码：16912 / 16917

页数：6

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