organic light emitting diodes (OLEDs) with a novel carrier transporting copolymer having a triphenylamine moiety as hole transporting unit and a triazine moiety as electron transporting unit in the polymer side chain and a CsF as electron injection material were fabricated. The device consisting of ITO/copolymer and DCM emitting material (500 Angstrom)/CsF (5 Angstrom)/Al showed high quantum efficiency of 0.3% at a DC 12 V. Especially, the electroluminescence (EL) device emitted red light (720 run) with high brightness corresponding to the emitting material.