An organic electroluminescent device made from a gadolinium complex

A gadolinium ternary complex, tris(1-phenyl-3-methyl-4-isobutyryl-5-pyrazolone) (phenanthroline) gadolinium [Gd(PMIP)(3)(Phen)] was synthesized and used as a light emitting material in the organic electroluminescent (EL) devices. The triple layer device with a structure of indium tin oxide (ITO)/N,N'-diphenyl-N,N'-bis(3-methylphenyl)-1,1'-biphenyl-4,4'-diamine (TPD) (20 nm)/Gd(PMIP)(3)(Phen) (80 nm)/2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (bathocuproine or BCP) (20 nm)/Mg: Ag(200 run)/Ag(100 nm) exhibited green emission peaking at 535 rim, A maximum luminance of 230 cd/m(2) at 17 V and a peak power efficiency of 0.02 lm/w at 9 V were obtained. (C) 2002 Elsevier Science Ltd. All rights reserved.