A bipolar host containing 1,2,3-triazole for realizing highly efficient phosphorescent organic light-emitting diodes
作者:Myoung Ki Kim、Jongchul Kwon、Tae-Hyuk Kwon、Jong-In Hong
DOI:10.1039/c0nj00091d
日期:——
We have developed a novel host material, 9,9′-(2-((4-phenyl-1,2,3-triazol-1-yl)methyl)biphenyl-4,4′-diyl)biscarbazole (CBP-TA), for realizing highly efficient blue phosphorescent OLEDs. The maximum external quantum efficiency of the OLED device developed using CBP-TA doped with a blue phosphorescent material was 30% greater than that of a CBP-based device. This enhanced external quantum efficiency resulted from the bipolar properties of the new host, owing to which well-balanced hole and electron transport through the emitting layer was achieved. The excellent bipolar carrier transport properties of the new host were experimentally verified using various OLED device data.
我们开发了一种新型主材料--9,9′-(2-((4-苯基-1,2,3-三唑-1-基)甲基)联苯-4,4′-二基)双咔唑(CBP-TA),用于实现高效的蓝色磷光 OLED。使用掺杂了蓝色磷光材料的 CBP-TA 开发的 OLED 器件的最大外部量子效率比基于 CBP 的器件高出 30%。这种外部量子效率的提高得益于新宿主的双极特性,由于这种特性,通过发光层实现了均衡的空穴和电子传输。通过各种有机发光二极管设备数据的实验,验证了新主控体出色的双极载流子传输特性。