Organic light-emitting device and use of a transparent electroconductive layer in an organic light-emitting device

An organic light-emitting device comprising:

• a substrate;
• a first electrode and a second electrode on one face of the substrate, at least the first electrode being semitransparent or transparent;
• and
• an organic electroluminescent layer sandwiched between the first and second electrodes, wherein the first electrode comprises a diffusing electroconductive layer having a haze of 2% or higher and the diffusing electroconductive layer is on the side where light emitted by the device is output,
• wherein the diffusing electroconductive layer is a multilayer structure comprising a first electroconductive layer made of an undoped mineral oxide and a second electroconductive layer made of a doped mineral oxide, and
• wherein the surface of the diffusing electroconductive layer is rough, having features larger in size than 50 nm from the surface of the substrate measured along the dimension parallel to the surface of the substrate.