Photoluminescent and electrolum characteristics of thin films of a terbiumcomplex with various ligands prepared using the vacuum evaporation method

Electroluminescent (EL) devices based on organic materials have been of gre at interest due to their possible applications for large-area flat-panel di splays, for which they are attractive because of their multi-color emission , and low operating-voltage capabilities. In this study, several Tb complex es, such as Tb(ACAC)(3)(Phen), Tb(ACAC)(3)(Phen-Cl), and Tb(TPB)(3)(Phen), were synthesized, and the PL and the EL characteristics of their thin films were investigated by fabricating devices having the structure ITO/TPD/Terb ium complex/Alq(3)/Al, where the TPD and the Alq(3) films were used as hole - and electron-transporting materials, respectively. It was found that the photoluminescence (PL) and the EL characteristics of these Terbium complexe s were dependent upon the ligands coordinated to the terbium metal.