Blue Aggregation-Induced Emission Luminogens: High External Quantum Efficiencies Up to 3.99% in LED Device, and Restriction of the Conjugation Length through Rational Molecular Design
作者:Jing Huang、Ning Sun、Jie Yang、Runli Tang、Qianqian Li、Dongge Ma、Zhen Li
DOI:10.1002/adfm.201401867
日期:2014.12
approaches for constructing blue fluorescent materials, which is one of the most important prerequisites for the commercialization of OLEDs. In recent years, various outstanding luminogens with aggregation‐induced emission characteristic exhibit promising applications as emitters, but blue AIE fluorophores with excellent EL performance are still very scarce. Here, five hole‐dominated blue AIE molecules
已经付出了巨大的努力来寻求用于构造蓝色荧光材料的新颖方法,这是OLED商业化的最重要的先决条件之一。近年来,具有聚集诱导发射特性的各种杰出的发光剂作为发射体具有广阔的应用前景,但是具有出色EL性能的蓝色AIE荧光团仍然非常稀缺。在这里,通过采用改变键合模式和增加分子内扭转的构造方法,展示了五个以空穴为主导的蓝色AIE分子,目的是在不牺牲良好的EL数据的情况下限制共轭长度。器件结果表明,新型合成材料可以用作双功能材料,即具有可比的EL效率的蓝色发光和空穴传输材料,并且η C,最大值和η EXT,最大值高达8.03光盘-1分别和3.99%,这是对于蓝色AIE luminogens最好EL性能之间。