红色热激活延迟荧光材料的研究进展

Recent Advances in Red Thermally Activated Delayed Fluorescence Materials

通过反向系间窜越,热激活延迟荧光(TADF)材料可以同时利用三线态激子和单线态激子,使器件的理论内量子效率突破传统荧光材料的25%,达到理论上的100%,可与磷光材料相媲美,且材料价格便宜无需贵金属,因而受到人们广泛关注。近年来,对绿光及蓝光材料的研究进展较快,而红光材料由于分子结构的合理设计比较困难,研究进展相对较慢。从受体的类型出发,综述了近年来有关红色TADF材料的研究进展,并结合现有工作,对红色TADF材料的发展前景进行了展望。

Since the thermally activated delayed fluorescence(TADF)materials can simultaneously utilize the triplet excitons and singlet excitons through reverse intersystem crossing(RISC),the theoretical internal quantum efficiency of the device breaks through 25%of the conventional fluorescent material to 100%,which can be comparable with the phosphorescent material,and the material is cheaper than phosphorescent material,which has been widespread concern.In recent years,the research progress of green and blue light material has been improved rapidly,but the red material is relatively slow due to the rational design of molecular structure is hard.In this paper,we summarize and discuss the latest progress about red TADF material from the type of electron acceptor,and prospect the development of red TADF material combined with current work.