The invention concerns an organic light-emitting device comprising: a substrate, in particular a transparent substrate, a first electrode and a second electrode on a common surface of the substrate, the first electrode being at least semi-transparent or transparent, a light-emitting layer interposed between the first and second electrodes. The invention is characterized in that the first electrode comprises an electroconductive diffusion layer having not less than 2% blur. The invention also concerns the use of an electroconductive diffusion layer having not less than 2% blur as electrode nearest to the substrate of an organic light-emitting device.