Various dibenzothiophene derivatives were synthesized as high triplet energy host materials for deep blue phosphorescent organic light-emitting diodes (PHOLEDs) and their device performances were investigated. Dibenzothiophene host materials with a hole transport type carbazole and electron transport type phosphine oxide moieties showed high quantum efficiency and low driving voltage due to balanced charge injection and transport. A high quantum efficiency of 20.2% and only 10% reduction of quantum efficiency at 1000 cd m−2 were demonstrated from the deep blue PHOLEDs with the dibenzothiophene based high triplet energy host materials.
合成了各种
二苯并噻吩衍
生物作为深蓝色
磷光有机发光二极管(PHOLED)的高三线态能量主体材料,并研究了它们的器件性能。具有空穴传输型
咔唑和电子传输型氧化膦部分的
二苯并噻吩主体材料由于平衡的电荷注入和传输而表现出高量子效率和低驱动电压。使用基于
二苯并噻吩的高三重态能量主体材料的深蓝色 PHOLED 表现出 20.2% 的高量子效率,并且在 1000 cd m−2 时量子效率仅降低 10%。