Patent ID: 9461276
Filing Date: 2016-10-04
CPC Classification: H01L

Claim Text:
1. An organic electroluminescence (EL) device comprising: a reflective electrode; a transparent electrode opposite the reflective electrode; a light-emitting layer between the reflective electrode and the transparent electrode; and a low refractive index layer between the reflective electrode and the light-emitting layer, wherein the low refractive index layer has a function of transporting or injecting electrons or holes, and has a refractive index lower than a refractive index of the light-emitting layer, a distance between a top surface of the reflective electrode and a central light-emitting position of the light-emitting layer is 300 nm or less, the reflective electrode comprises Al, and Δn×d/λ≦−0.009 is satisfied where: λ denotes a central light-emitting wavelength of light generated in the light-emitting layer; Δn denotes a difference between the refractive index of the low refractive index layer and the refractive index of the light-emitting layer when the refractive index of the light-emitting layer is used as reference; and d denotes a thickness of the low refractive index layer, wherein the light-emitting layer emits light when voltage is applied to the reflective electrode and the transparent electrode.