Study of the luminescence properties of a novel rare earth complex Tb(DPC)22H2O

Rare earth complex Tb(DPC)22H2O was synthesized by introducing Pyridine-2,6-dicarboxylic acid(H2DPC) as the ligand and characterized by UV, fluorescent and infrared spectra as well as elemental analysis. The complex exhibited ligand-sensitized green emission, and it has the higher sensitized luminescent efficiency and longer lifetime. The effect and mechanism of the ligand (H2DPC) on the luminescence properties of terbium complex was discussed. In device ITO/PVK/Tb(DPC)22H2O/Al, Tb3+ may be excited by intramolecular energy transfer from ligand as observed by electroluminescence. The main emitting peak at 545 nm can be attributed to the transition of 5D4→7F5 of Tb3+ ion and this process results in the enhancement of green emission from electroluminescence device.