Highly Efficient Red Phosphorescent Organic Light-Emitting Devices Using Iridium(III) Complexes Based on 2-(biphenyl-3-yl)Quinoline Derived Ligands
作者:Hyun Ju Kang、Kum Hee Lee、Heo Min Kim、Ji Hyun Seo、Young Kwan Kim、Seung Soo Yoon
DOI:10.1166/jnn.2012.5664
日期:2012.4.1
Red phosphorescent emitters were synthesized based on Ir(III) phenylquinoline complexes for applications to OLEDs. Ir(III) complexes 1-3 were based on 2-(biphenyl-3-yl)-quinoline units connected to various phenyl groups such as 5-phenyl, 5-(4-fluorophenyl), and 6-phenyl groups. The EL efficiencies were quite sensitive to the structural features of the dopants in the emitting layers. In particular, a high-efficiency red OLED was fabricated using complex 1 as the dopant in the emitting layer. This OLED showed a maximum luminance, luminous efficiency, power efficiency, external quantum efficiency and CIE x,y coordinates of 21,600 cd/m2 at 16 V, 11.80 cd/A at 20 mA/cm2, 3.57 Im/W at 20 mA/cm2, 10.90% at 20 mA/cm2, (x = 0.63, y = 0.32) at 12 V, respectively.
我们合成了基于 Ir(III) 苯基喹啉配合物的红色磷光发光体,并将其应用于有机发光二极管。1-3号Ir(III)配合物基于与各种苯基(如5-苯基、5-(4-氟苯基)和6-苯基)相连的2-(联苯-3-基)喹啉单元。电致发光效率对发光层中掺杂剂的结构特征相当敏感。特别是,使用复合物 1 作为发光层中的掺杂剂,制造出了一种高效率的红色有机发光二极管。这种有机发光二极管在 16 V 时的最大亮度、发光效率、功率效率、外部量子效率和 CIE x,y 坐标分别为 21,600 cd/m2,20 mA/cm2 时为 11.80 cd/A,20 mA/cm2 时为 3.57 Im/W,20 mA/cm2 时为 10.90%,12 V 时(x = 0.63,y = 0.32)。