基于FHQZn发光的色度稳定的有机白光器件

研究了一种新型发光材料(E)-2-(2-(9H-fluoren-2-yl)vinyl)quinolato-Zinc的发光性能,利用它的空穴传输和发光特性制备了有机白光器件,器件的结构为:ITO/2T-NATA(15nm)/FHQZn(38nm)/NPB(25nm)/BCP(10nm)/Alq(30nm)/LiF(0.5nm)/Al,其中,(E)-2-(2-(9H-fluoren-2-yl)vinyl)quinoato-Zinc(FHQZn)作为空穴传输层和黄橙色发射层,N,N′-bis-(1-naphthyl)-N,N′-diphenyl-1,1′-biphenyl-4,4′-diamine(NPBX)作为蓝光发射层。器件最大的电流效率为1.68cd/A(at7V),最大的亮度为4624cd/m2(at12V),此时色坐标为(0.28,0.25)。器件的色坐标由7V(66.83cd/m2)时的(0.27,0.29)到12V(4624cd/m2)时的(0.28,0.25)几乎不变,是一个基于新型材料的色度较稳定的有机白光器件。

Color-stable Fluorescent White Organic Light-emitting Devices Based on FHQZn As Emitter

The white organic light-emitting devices(WOLED)were fabricated based on a novel yellowish-orange FHQZn as emitting/hole-transporting layer.The device fabrication is ITO/2T-NATA(15 nm)/FHQZn(38 nm)/NPBX(25 nm)/BCP(10 nm)/Alq(30 nm)/LiF(0.5 nm)/Al,In the devices,(E)-2-(2-(9H-fluoren-2-yl)vinyl)quinolato-Zinc(FHQZn)acts as a hole-transporting and yellowish-orange light-emitting layers,N,N'-bis-(1-naphthyl)-N,N'—diphenyl-1,1'-biphenyl-4,4'-diamine(NPBX)as a blue light-emitting layer,respectively,a WOLED with a maximum luminous efficiency of 1.68 cd/A(at 7 V).a maximum luminance of 4 624 cd/m2(at 12 V),and Commission Internationale De L'Eclairage coordinates of(0.2789,0.2469)was achieved.The CIE coordinates of Device were(0.27,0.29)for 7 V(66.83 cd/m2)to(0.28,0.25)for 12 V(4 624 cd/m2),and were stable on the voltages.