作者:M. H. Seo、Kyeong K. Lee、K. S. Kim、S. Lee
DOI:10.1166/jnn.2016.11050
日期:2016.3.1
An electron-transporting triazole (Tz) and hole transporting carbazole (Cz) moieties were introduced into the fluorene structure via a Suzuki coupling reaction. The resulting material, 9-(4′-(9-(4′-(4,5-diphenyl-4H-1,2,4-triazol-3-yl)-[1,1′-biphenyl]-4-yl)-9H-fluoren-9-yl)-[1,1′-biphenyl]-4-yl)-9H-carbazole (Tz-FL-Cz), was synthesized and can be used as the host layer in phosphorescent OLEDs. The synthesized material exhibits wide energy gap (3.46 eV). The absorption and emission maximum of the Tz-FL-Cz was observed at 300 nm and 389 nm, respectively. Blue phosphorescent devices using Tz-FL-Cz as host material exhibited maximum current efficiency of 3.2 cd/A and power efficiency of 1.3 lm/W, respectively.
通过Suzuki偶联反应,将电子传输三唑(Tz)和空穴传输咔唑(Cz)基团引入芴结构中。合成了所得材料9-(4′-(9-(4′-(4,5-二苯基-4H-1,2,4-三唑-3-基)-[1,1′-联苯]-4-基)-9H-芴-9-基)-[1,1′-联苯]-4-基)-9H-咔唑(Tz-FL-Cz),并可作为磷光OLED中的主体层材料。合成的材料具有宽的能隙(3.46 eV)。Tz-FL-Cz的最大吸收和发射波长分别在300 nm和389 nm处。采用Tz-FL-Cz作为主体材料的蓝色磷光器件显示出最大电流效率为3.2 cd/A和最大功率效率为1.3 lm/W。