Triazine-dibenzocarbazole based bipolar host materials for highly luminescent green and yellow phosphorescent organic light emitting diodes
作者:Ramanaskanda Braveenth、Hyuna Lee、Min-Geun Song、Kanthasamy Raagulan、Young Hee Park、Sunghoon Kim、Jang Hyuk Kwon、Kyu Yun Chai
DOI:10.1016/j.dyepig.2018.12.053
日期:2019.4
devices to study the host performances. The TRZ-DBC1 based yellow device showed excellent current efficiency of 71.4 cd/A, while CBP based reference device showed lower efficiency of 58.0 cd/A. The external quantum efficiency of TRZ-DBC1 (25.4%) and TRZ-DBC2 (22.4%) were outstanding when compare to reference device (19.1%). The TRZ-DBC2 used as host material for green phosphorescent OLED due to its higher
两种新的双极性主体材料7-(4-(4,6-二苯基-1,3,5-三嗪-2-基)苯基)-7H-二苯并[a,g]咔唑(TRZ-DBC1)和7-设计并合成了(4-(4,6-二苯基-1,3,5-三嗪-2-基)苯基)-7H-二苯并[a,i]咔唑(TRZ-DBC2)。两种材料均具有出色的热稳定性和良好的双极性特性。我们已经制造了黄色和绿色磷光OLED器件来研究主机的性能。基于TRZ-DBC1的黄色设备显示了71.4 cd / A的出色电流效率,而基于CBP的参考设备显示了58.0 cd / A的较低电流效率。与参考器件(19.1%)相比,TRZ-DBC1(25.4%)和TRZ-DBC2(22.4%)的外部量子效率出色。TRZ-DBC2用作绿色磷光OLED的主体材料,因为它的三重态能量更高,为2.71 eV。绿色磷光OLED表现出出色的电流效率(75.9 cd / A)和出色的外部量子效率(24.7%)。