Modulation of p-type units in tripodal bipolar hosts towards highly efficient red phosphorescent OLEDs
作者:Quan Ran、Yuan-Lan Zhang、Xiaochen Hua、Man-Keung Fung、Liang-Sheng Liao、Jian Fan
DOI:10.1016/j.dyepig.2018.10.076
日期:2019.3
which was confirmed by the hole-only and electron-only device results. Due to the efficient energy transfer from these compounds to the dopant (Ir(MDQ)2(acac)), the red phosphorescent OLEDs demonstrated high device performance with maximum external quantum efficiency (EQE) over 20%. Particularly, the red OLED hosted by CNTPA-PTZ achieved a maximum efficiency of 42.5 cd/A, 44.3 lm/w and 23.4% with the
设计并合成了三种新颖的三脚架双极化合物(CNTPA-CZ,CNTPA-PXZ和CNTPA-PTZ),其中三个官能团分别连接到中央苯环的1,3,5-位。在这三种化合物中,咔唑/吩恶嗪/吩噻嗪(CZ / PXZ / PTZ)和苄腈分别用作给电子基团和吸电子基团,以实现双极性传输功能,这仅由空穴和电子仅设备结果。由于从这些化合物到掺杂剂的有效能量转移(Ir(MDQ)2(acac)),红色磷光OLED表现出了很高的器件性能,最大外部量子效率(EQE)超过20%。特别是,由CNTPA-PTZ承载的红色OLED的最大效率为42.5 cd / A,44.3 lm / w和23.4%,EQE从峰值到在500 cd /亮度下的滚降比为3.4%。 m 2。