Patent ID: 9203047
Filing Date: 2015-12-01
Classification: H01L

Abstract:
1. An organic electroluminescent element, comprising: a transparent substrate; an electroluminescent laminate including a first electrode, an organic layer, and a second electrode, the first electrode being transparent and disposed over a surface of the transparent substrate, the organic layer being disposed on a first surface of the first electrode, and the second electrode being disposed on a surface of the organic layer; a light-outcoupling layer disposed between the surface of the transparent substrate and a second surface of the first electrode; a covering substrate facing the transparent substrate; an adhesive sealing portion surrounding the electroluminescent laminate and bonding the covering substrate to the surface of the translucent substrate, the adhesive sealing portion defining a surrounded region where the electroluminescent laminate is covered with the cover substrate; and a connection electrode disposed on a surface of the light-outcoupling layer and extending from an inside to an outside of the surrounded region, wherein the light-outcoupling layer has an adhesion region where the adhesive sealing portion is provided and a central region where the electroluminescent laminate is disposed, the light-outcoupling layer has a thickness at the central region and an average thickness at the adhesion region which is smaller than the thickness at the central region, the light-outcoupling layer includes a low-refractive index layer and a high-refractive index layer having a refractive index larger than that of the low-refractive index layer, the low-refractive index layer is disposed closer to the surface of the transparent substrate than the high-refractive index layer, the high-refractive index layer is disposed closer to the second surface of the first electrode than the low-refractive index layer, the light-outcoupling layer has an uneven structure at an interface between the low-refractive index layer and the high-refractive index layer, and one of the low-refractive index layer and the high-refractive index layer is less moisture-permeable and extends more outward than the other layer.