Rational design of quinoxaline-based bipolar host materials for highly efficient red phosphorescent organic light-emitting diodes
作者:Zilong Feng、Zhixiang Gao、Wenshan Qu、Tingting Yang、Jiangang Li、Lixiong Wang
DOI:10.1039/c9ra01149h
日期:——
thermal, photophysical and electrochemical properties of the two host materials were characterized and explored in detail. Red phosphorescent light-emitting diodes with M1 and M2 as hosts were prepared to explore their electroluminescent properties. Both M1 and M2 host-based red devices exhibit outstanding electroluminescent performance. For example, two red devices all realize good red emission with the
两种新型双极性咔唑/二苯基喹喔啉基主体材料 3-(2,3-diphenylquinoxalin-6-yl)-9-phenyl-9 H - carbazole ( M1 ) 和 3-(4-(2,3-diphenylquinoxalin-6-)基)苯基)-9-苯基-9 H-咔唑(M2)经过合理设计和合成。还引入了官能化喹喔啉部分和咔唑部分之间的苯基间隔物以研究其对它们的光物理性质的影响。对两种主体材料的化学结构、热学、光物理和电化学性质进行了详细的表征和探索。带M1和M2的红色磷光发光二极管作为主机准备探索它们的电致发光特性。基于M1和M2主体的红色器件都表现出出色的电致发光性能。例如,两个红色器件都实现了良好的红色发射,最大值在594 nm,M1基器件的最大外量子效率和亮度可以达到14.66%和28 619 cd m -2和15.07 %和28 818 cd m - 2对于基于M2的器件,表