LIGHT-EMITTING DEVICE

摘要

This light-emitting device has a light-emitting element and a light-extracting layer that transmits light produced by said light-emitting element. The light-emitting element has a light-transmitting first electrode layer on the side facing the light-extracting layer, a second electrode layer on the side facing away from the light-extracting layer, a light-emitting layer between the first and second electrode layers, and a power-feeding unit that is positioned near the first and second electrode layers and the light-emitting layer and applies a voltage between the first and second electrode layers. The light-extracting layer has a structure in which a low-refractive-index layer having a relatively low refractive index and a high-refractive-index layer having a refractive index that is higher than that of the low-refractive-index layer are laminated together. The interface between the low-refractive-index layer and the high-refractive-index layer is textured. The light-extracting layer has a first region and a second region that is farther from the power-feeding unit than the first region is, and the texture at the aforementioned interface is designed such that the second region exhibits a higher light-extraction efficiency than the first region.