Yu Ling, Wu Zhongbin, Xie Guohua, Zhong Cheng, Zhu Zece, Ma Dongge, Yang Chuluo
Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Hubei Key Lab on Organic and Polymeric Optoelectronic Materials, Department of Chemistry, Wuhan University, Wuhan, 430072, People's Republic of China.
Chem Commun (Camb). 2018 Feb 1;54(11):1379-1382. doi: 10.1039/c7cc09925h.
We managed to integrate the features of aggregation-induced emission (AIE) and thermally activated delayed fluorescence (TADF), by introducing a fluorine atom into the quinoxaline system for highly efficient fluorescent OLEDs. With a purposive design and well-controlled synthesis, two novel AIE-TADF compounds were demonstrated and characterized. Monofluoro-substituted SFDBQPXZ exhibited high efficiencies in a doped OLED with a maximum EQE of 23.5%, a maximum current efficiency (CE) of 78.3 cd A and a maximum power efficiency (PE) of 91.1 lm W. Noteworthily, by employing SFDBQPXZ as an orange emitter in a non-doped device, we have realized a considerably high EQE over 10%. The high efficiency and low roll-off in the doped or non-doped devices make our strategy promising and meaningful for OLED applications.
通过将氟原子引入喹喔啉体系，我们成功整合了聚集诱导发光（AIE）和热激活延迟荧光（TADF）的特性，用于高效荧光有机发光二极管（OLED）。通过有目的的设计和精确控制的合成，展示并表征了两种新型的AIE-TADF化合物。单氟取代的SFDBQPXZ在掺杂的OLED中表现出高效率，最大外量子效率（EQE）为23.5%，最大电流效率（CE）为78.3 cd/A，最大功率效率（PE）为91.1 lm/W。值得注意的是，通过在非掺杂器件中使用SFDBQPXZ作为橙色发射体，我们实现了超过10%的相当高的EQE。掺杂或非掺杂器件中的高效率和低滚降使得我们的策略在OLED应用中具有前景和意义。
