Author/Authors :
Liu، نويسنده , , Lin and Li، نويسنده , , Wenlian and Hong، نويسنده , , Ziruo and Peng، نويسنده , , Junbiao and Liu، نويسنده , , Xingyuan and Liang، نويسنده , , Chunjun and Liu، نويسنده , , Zhibin and Yu، نويسنده , , Jiaqi and Zhao، نويسنده , , Dongxu، نويسنده ,
Abstract :
Using two different trivalent europium (Eu3+) complexes, europium(dibenzoylmethanato) 3(bathophenanthroline) [Eu(DBM) 3bath] and europium (dibenzoylmethanato) 3(monophenanthroline) [Eu(DBM) 3phen], with different ligands for emission-layer materials, various types of electroluminescent (EL) devices have been fabricated. Combined with a triphenylamine derivative (TPD) and an oxadiazole derivative (OXD7) as hole-transport-layer materials, two-layer- and three-layer-type devices have been fabricated. We find that these two emission-layer materials have similar EL spectra, but their EL performances are different. The EL capability of the Eu complexes and their carrier-transporting characteristics are largely dependent on the ligands.
