Sky-Blue Aggregation-Induced Delayed Fluorescence Luminogens with High Horizontal Dipole Orientation for Efficient Organic Light-Emitting Diodes
CHINESE JOURNAL OF CHEMISTRY(2023)
摘要
Efficient and stable blue luminescent organic materials are highly demanded in the field of organic light-emitting diodes (OLEDs) but still remain challenging. In this work, two new sky-blue luminescent molecules comprised of electron acceptor of benzophenone and electron donors of spiro[acridine-9,9'-fluorene] and carbazole are designed and synthesized, and their thermal stability, electrochemical behaviors, photophysical properties, carrier transport ability and electroluminescence performance are investigated. They exhibit distinct merits of aggregation-induced delayed fluorescence with high solid-state photoluminescence quantum yields, balanced bipolar carrier transport and high horizontal dipole ratios. Highly efficient OLEDs using both molecules as emitters are obtained, which radiate strong sky-blue light and provide outstanding external quantum efficiencies of up to 33.3% with small roll-offs.
更多查看译文
关键词
Aggregation-induced delayed fluorescence,Thermally activated delayed fluorescence,Horizontal dipole orientation,Organic light-emitting diode,Reverse intersystem crossing
AI 理解论文
溯源树
样例
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要