Organic light emitting device with roughening layer and method of producing

An organic light emitting device, in a layered structure, comprising:

• a substrate,
• a bottom electrode,
• a top electrode, wherein the bottom electrode is arranged closer to the substrate than the top electrode,
• an electrically active region, the electrically active region comprising one or more organic layers and arranged between and in electrical contact with the bottom electrode and the top electrode,
• a light emitting region in the electrically active region, and
• a roughening layer, the roughening layer comprising a non-closed layer in the electrically active region, wherein the roughening layer is arranged between the light emitting region and the top electrode, and provides an electrode roughness to the top electrode on at least one of an inner side facing the electrically active region and an outer side of the top electrode facing away from the electrically active region, and wherein the roughening layer comprises a plurality of separated particles having a lateral dimension of from about 50 nm to about 500 nm and a height of at least 3 nm but less than 50 nm.