Synthesis and electroluminescence properties of fluorene containing arylamine oligomer

We synthesized a blue fluorescent fluorene containing arylamine oligomer, bis(9,9,9',9'-tetra-noctyl-2,2'-difluorenyl-7-yl)phenylamine (DFPA), and investigated its electroluminescence (EL) properties. Organic EL devices with a structure of glass/indium-tin oxide/acid-doped poly(thiophene) derivative/DFPA/aluminum complex (BAlq)/cesium-doped macrocyclic compound/Al were fabricated. The device exhibited blue emission, peaking at 432 nm, from the DFPA layer. The maximum luminance of 1800 cd/m(2) and an external quantum efficiency of 1.5% were observed. Copyright (C) 2004 John Wiley Sons, Ltd.