Voltage-independent pure red devices based on a carbazole-functionalized europium complex

Xin H; Sun M; Wang KZ; Zhang YA; Jin LP; Huang CH

Chemical Physics Letters, Vol.388, No.1-3, 55-57, 2004

DOI10.1016/j.cplett.2004.02.073 Export Citation

Voltage-independent pure red devices based on a carbazole-functionalized europium complex

Xin H, Sun M, Wang KZ, Zhang YA, Jin LP, Huang CH

Electroluminescent properties of carzole-founctionized complex tris(dibenzoylmethanato)(1-ethyl-2-(N-ethyl -carbazole-yl-4)imidazo[4,5-f]1,10-phenanthroline)europium(III) (Eu(DBM)(3)Phencarz) was investigated. By utilizing complex tris(1-phenyl-3-methyl-4-iso butyl-5-pyrazolone)-bis(triphenyl phosphine oxide) gadolinium Gd(PMIP)(3)(TPPO)(2) as electron-transport layer, hole and electron injection was relatively balanced in the emitting layer and a device with the configuration of ITO/TPD (20 nm)/ (Eu(DBM)(3)Phencarz) (40 nm)/Gd(PMIP)(3)(TPPO) (20 nm)/AlQ (30 nm)/Mg:Ag emitted voltage-independent characteristic europium light with the luminance of 1193 cd/m(2), power efficiency 1.68 lm/W. (C) 2004 Elsevier B.V. All rights reserved.