摘要
利用咔唑作为给体基元、三嗪作为受体基元,通过有效组合和位点调控设计合成了两个发光机理-热活化延迟荧光(TADF)分子:m-CzTri和p-CzTri.这两个材料均发射明亮的蓝色荧光,且具有非常小的单线态-三线态激子分裂能.计算模拟表明,给体和受体基团分离了最高占据轨道(HOMO)和最低未占据轨道(LUMO),使它们之间交叠很小.此外,测试了它们的热学、电化学、光物理和器件性质,其中,m-CzTri作为发光分子的有机发光二极管(OLED)器件的色坐标为(0.15,0.25),得到了高达18%的外量子效率.
Using carbazole as the donor motif, triazine as the acceptor motif, two thermally activated delayed fluorescence (TADF) molecules of m-CzTri and p-CzTri were designed and synthesized through efficient combination and position regulation. Both materials emit bright blue fluorescence with very small singlet-triplet splitting energy. Computational simulations show that the donor and acceptor groups are well separated from the highest occupied orbit (HOMO) and the lowest unoccupied orbit (LUMO). In addition, their thermal, electrochemical, photophysical, and device properties were tested. Among them, the color coordinates of organic light emitting diode (OLED) devices with m-CzTri as the emitter were (0.15, 0.25), and the external quantum efficiency was as high as 18%.
作者
王彤彤
华晓晨
郁友军
袁熠
冯敏强
蒋佐权
Wang Tongtong;Hua Xiaochen;Yu Youjun;Yuan Yi;Fung Mankeung;Jiang Zuoquan(Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials, Soochow University, Suzhou 215123)
出处
《有机化学》
SCIE
CAS
CSCD
北大核心
2019年第5期1436-1443,共8页
Chinese Journal of Organic Chemistry
基金
国家自然科学基金(Nos.21572152,51873139)资助项目~~
关键词
热活化延迟荧光
咔唑
三嗪
蓝光发光分子
有机发光二极管
thermal activated delayed fluorescence
carbazole
triazine
blue emitter
organic light emitting diodes
