Electroluminescence and photoluminescence of a novel Eu:(TTA) m complexes doped with poly (N vinylcarbazole) (PVK) was reported in this paper.There is an energy transfer from PVK to Eu:(TTA) m complexes,since there is large overlap between emissive spectrum of PVK and absorption spectrum of ligand TTA,and the emission from PVK is also obtained if there is enough PVK in the solution blends.Under a forward bias,the emission light is obtained only from rare earth complexes rather than PVK.And the stability of light emitting diodes made from the blends is improved greatly,as well as the efficiency if an electron transporting layer was sandwiched in the diodes.