Patent ID: 8339037
Filing Date: 2012-12-25
Classification: H01L

Abstract:
1. An organic light emitting device having a plurality of emission layers between an anode and a cathode, said emission layers being separated from each other by an equipotential surface forming layer or a charge generating layer, wherein said organic light emitting device further comprises: an optically-transparent substrate having a first surface and a second surface; and a light scattering means, at least either inside or outside the device, for scattering light emitted from said emission layers, wherein a first electrode of said anode or said cathode is an optically-transparent electrode having a first surface and a second surface, and the second surface of the first electrode is mounted on the first surface of the optically-transparent substrate, wherein a second electrode of said anode or said cathode has a first surface, and a second surface of the second electrode is mounted on the first surface side of the first electrode so that said emission layers intervene between the first surface of the first electrode and the second surface of the second electrode, and wherein the second electrode is a light-reflective electrode, wherein said organic light emitting device further comprises a layer having a first surface, and a second surface provided on the emission layers so that said layer intervene between the emission layers and the second surface of the second electrode, said layer having variations of a film thickness of the layer, said layer and the second surface side of the second electrode forming the light scattering means, wherein the layer between the emission layers and the second surface of the second electrode is an electron injection layer.