Patent ID: 7872414

Claim:
A light-emitting device comprising: a first electrode; a second electrode; and an emissive layer disposed between the first electrode and the second electrode; and a part of light emitted from the emissive layer being extracted as radiated light; wherein the first electrode, a light extraction layer to extract the radiated light, and a low refractive index layer having a lower refractive index than an average refractive index of the emissive layer and the light extraction layer are arranged in order in a direction in which the radiated light is extracted, the first electrode is a transparent electrode, the light extraction layer includes a material whose refractive index is more than 2, and an average refractive index of the light extraction layer is between 1.1 and 1.5, and the light extraction layer is formed in a same specification for all the emissive layer over the entire emissive area and in contact with the first electrode, and the light extraction layer scatters wave-guided light of the emitted light which is wave-guided in the first electrode.