A highly efficient red electrophosphorescent iridium(iii) complex containing phenyl quinazoline ligand in polymer light-emitting diodes
作者:Qunbo Mei、Lingxia Wang、Yuanhui Guo、Jiena Weng、Fang Yan、Bo Tian、Bihai Tong
DOI:10.1039/c2jm15160j
日期:——
A novel iridium(III) complex (PQxD)2Ir(pic) (HPQxD, N,N,2-triphenylquinazolin-4-amine; pic, 2-picolinic acid) was synthesized and used as a triplet emitter doped in a polymeric host in solution-processed electrophosphorescent light-emitting diodes. Polymer light-emitting devices (PLEDs) with the structure of ITO/PEDOT:PSS/(70% PVK + 30% PBD):x% (PQxD)2Ir(pic)/TPBI/CsF/Al were fabricated with high external quantum efficiency. The device based on (PQxD)2Ir(pic) furnishes a maximum external quantum efficiency of 18.44% and a luminance of 7107 cd m−2 at 8% doping concentration. The Commission International de L'Eclairage (CIE) coordinates of the complex were (0.619,0.376).
合成了一种新型铱(III)配合物(PQxD)2Ir(pic)(HPQxD,N,N,2-三苯基喹唑啉-4-胺;pic,2-穿心莲酸),并将其用作掺杂在聚合物宿主中的三重发射器,用于溶液法电磷光发光二极管。制备出了具有高外部量子效率的 ITO/PEDOT:PSS/(70% PVK + 30% PBD):x% (PQxD)2Ir(pic)/TPBI/CsF/Al 结构的聚合物发光器件(PLED)。基于 (PQxD)2Ir(pic) 的器件在掺杂浓度为 8%时的最大外部量子效率为 18.44%,亮度为 7107 cd m-2。复合物的国际照明委员会(CIE)坐标为 (0.619,0.376)。