a high triplet energy of 2.69 eV. Solution-processed PhOLEDs fabricated with DY1 host achieved excellent performance of 47.05 cd/A, 34.0 lm/W and 14.27% for green PhOLED, and 32.95 cd/A, 17.0 lm/W and 16.57% for the red PhOLED, respectively. This result revealed the structural advantage of the host material in high efficiency and low efficiency roll-off in PhOLEDs.
新型双极性主体材料2-(2'-(5-(二苯并[ b,d ]
呋喃-4-基)-1H-
吲哚-1-基)-[1,1'-
联苯] -3-基)设计并合成了基于供电子
吲哚和吸电子
苯并咪唑的-1-苯基-1H-苯并[ d ]
咪唑(DY1),用于溶液处理的
磷光有机发光二极管(PhOLED)。来自1,3'-
联苯桥上正交连接的供体和受体的高度扭曲的构象赋予DY1高热稳定性(T g 122°C)和2.69 eV的高三重态能量。用DY1固溶处理的PhOLED主机对绿色PhOLED的出色性能分别为47.05 cd / A,34.0 lm / W和14.27%,对于红色PhOLED分别为32.95 cd / A,17.0 lm / W和16.57%。该结果揭示了主体材料在PhOLED中的高效率和低效率滚降方面的结构优势。