An organic electro-luminescent device and a method for fabricating the same are disclosed in the present invention. The electro-luminescent device includes first and second electrodes over a substrate, and an organic emission layer between first and second electrodes, wherein the organic emission layer has a blended structure of a block copolymer and an organic emission material. The fabricating method includes forming a first electrode on a substrate, forming an organic emission layer over the first electrode, wherein the organic emission layer has a blended structure of a block copolymer and an organic emission material, and forming a second electrode over the organic emission layer.