Organic light emitting device

An organic light emitting device comprising a layered structure comprising:

• a substrate,
• a bottom electrode and a top electrode, wherein the bottom electrode is closer to the substrate than the top electrode,
• an electronically active region, the electronically active region being provided between and in electrical contact with the bottom electrode and the top electrode,
• at least one light emitting layer, the at least one light emitting layer being provided in the electronically active region,
• a top electrically doped transport and/or injection layer, the top electrically doped transport and/or injection layer being provided in the electronically active region, and
• a roughening organic layer, wherein the roughening organic layer is provided in the electronically active region, made of a self-crystallizing organic material, and provided with a thickness of less than 50 nm,
• wherein the top electrically doped transport and/or injection layer is provided between the roughening organic layer and the top electrode.