Bipolar Host Materials with Carbazole and Isoquinoline/Benzothiazole Moieties for Green Phosphorescent Organic Light-Emitting Diodes
作者:Jwajin Kim、Se Hyun Kim、Ho Won Lee、Song Eun Lee、Young Kwan Kim、Seung Soo Yoon
DOI:10.1166/jnn.2016.13241
日期:2016.10.1
In this study, we demonstrate three bipolar host materials based on carbazole and isoquinoline/benzothiazole derivatives for use in green phosphorescent organic light-emitting diodes. Particularly, 9-[4-(isoquinolin-1-yl)phenyl]-9H-carbazole (1) exhibited good properties for use in green phosphorescent organic light-emitting diodes. A device using compound 1 as the host with the green phosphorescent dopant bis[2-(1,1′,2′,1″-terphen-3-yl)pyridinato- C,N]iridium(III)(acetylacetonate) showed the green emission with a maximum external quantum efficiency, power efficiency, and luminance efficiency of 8.1%, 26.71 lm/W, and 29.76 cd/A at 20 mA/cm2, respectively. The Commission International de L’Eclairage (CIE) chromaticity coordinates of this device were (0.35, 0.61) at 8.0 V.
在这项研究中,我们展示了三种基于咔唑和异喹啉/苯噻唑衍生物的双极性主材料,可用于绿色磷光有机发光二极管。特别是,9-[4-(异喹啉-1-基)苯基]-9H-咔唑(1)表现出良好的特性,适用于绿色磷光有机发光二极管。使用化合物1作为主材料,并与绿色磷光掺杂剂双[2-(1,1′,2′,1″-三苯基-3-基)吡啶基-C,N]铱(III)(乙酰丙酮)的设备显示出绿色发光,最大外量子效率为8.1%,功率效率为26.71 lm/W,亮度效率为29.76 cd/A,电流密度为20 mA/cm²。在8.0 V下,此设备的国际照明委员会(CIE)色度坐标为(0.35, 0.61)。