A simple molecular design strategy for efficient deep-red thermally activated delayed fluorescence emitter

被引：0

作者：

Jin, Yu-Xin ^{[1
]}

Liu, Huanling ^{[2
]}

Zhao, Yue ^{[3
]}

Chen, Zi-Qi ^{[1
]}

Hu, Shengkai ^{[1
]}

Zhang, Kai ^{[4
]}

Fung, Man-Keung ^{[1
]}

Zhou, Dong-Ying ^{[1
]}

Liao, Liang-Sheng ^{[1
]}

Fan, Jian ^{[1
,5
]}

机构：

[1] Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Jiangsu, Suzhou,215123, China

[2] Shandong Province Key Laboratory of Medical Physics and Image Processing Technology, School of Physics and Electronics, Shandong Normal University, Jinan,250014, China

[3] Coordination Chemistry Institute, State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing,210023, China

[4] College of Physics and Engineering, Qufu Normal University, Shandong, Qufu,273165, China

[5] State Key Laboratory of Structural Chemistry, Fujian Institute of Research on Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou,35002, China

来源：

Chemical Engineering Journal | 2024年 / 488卷

基金：

中国国家自然科学基金;

关键词：

Electroluminescence - Excited states - Fluorescence - Organic light emitting diodes (OLED);

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The design and synthesis of efficient deep-red (DR) thermally activated delayed fluorescence (TADF) materials is challenging. In this work, we reported a simple molecular design strategy for constructing DR TADF via embedding a high-Stokes-shift dye in molecular skeleton, which induced dual intramolecular charge transfer and structural relaxation of excited state while achieving remarkable electroluminescence (EL) performance. The proof-of-concept emitter BF2-TPA demonstrated longer emission wavelength than the Br/CN-containing counterparts. Organic light-emitting diode (OLED) based on BF2-TPA exhibited high external quantum efficiency (EQE) of 28.4 % at 656 nm. This work demonstrates the great potential of utilizing high-Stokes-shift fragment in constructing efficient DR TADF emitters. © 2024 Elsevier B.V.

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