期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 61, 期 30, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202204652
关键词
Green Emission; Multiple Resonance; Organic Light-Emitting Diodes; Polycyclic Aromatic Hydrocarbons; Thermally Activated Delayed Fluorescence
资金
- National Natural Science Foundation of China [21935005]
- National Key R&D Program of China [2020YFA0714601]
- Foshan Science and Technology Innovation Team Special project [1920001000128, 2019TD-33]
In this study, a novel molecular construction paradigm based on multiple resonance was proposed for thermally activated delayed fluorescence (TADF) compounds. A representative multiple resonance polycyclic aromatic hydrocarbon (MR-PAH) was successfully synthesized using this method. The resulting compound exhibited excellent green emission performance in organic light-emitting diodes (OLEDs).
Multiple resonance thermally activated delayed fluorescence (MR-TADF) compounds have set off an upsurge of research because of their tremendous application prospects in the field of wide color gamut display. Herein, we propose a novel MR-TADF molecular construction paradigm based on polycyclization of the multiple resonance parent core, and construct a representative multiple resonance polycyclic aromatic hydrocarbon (MR-PAH) based on the para-alignment of boron and nitrogen atoms into a six-membered ring (p-BNR). Through the retrosynthesis analysis, a concise synthesis strategy with wide applicability has been proposed, encompassing programmed sequential boron esterification, Suzuki coupling and Scholl oxidative coupling. The target model molecule BN-TP shows green fluorescence with an emission peak at 523 nm and a narrow full-width at half-maximum (FWHM) of 34 nm. The organic light-emitting diode (OLED) employing BN-TP as an emitter exhibits ultrapure green emission with Commission Internationale de L'Eclairage (CIE) coordinates of (0.26, 0.70), and achieves a maximum external quantum efficiency (EQE) of 35.1 %.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据