Poly(N-(p-diphenylamine)phenylmethacrylamide (PDPMA) as a polymer hole transporting material and 8-hydroxyquinoline-zinc complex (Znq(2)) as an emitting material were synthesized and the organic electroluminescent (EL) device consisting of ITO/PDPMA/ Znq(2)/Al was fabricated. The chemicophysical and luminescent properties of Znq(2) were significantly influenced by thermal heat treatment. Especially, EL device composed of heat-treated Znq2 at 200 degreesC for 3 h emitted orange light with high brightness of 830 cd/m(2).