Patent ID: 9698382
Date: 2017-07-04
CPC Classifications: H01L

Claim:
1. An organic light emitting element comprising: a first electrode which reflects incident light; a second electrode which is disposed opposing the first electrode, and allows the incident light to pass through; an organic light emitting layer which is disposed between the first electrode and the second electrode, and emits at least blue light; a first functional layer which is disposed between the first electrode and the organic light emitting layer, and formed of one or more layers; and a second functional layer which is disposed between the organic light emitting layer and the second electrode, and formed of one or more layers, wherein the following paths are formed in the organic light emitting element: a first optical path in which part of the blue light emitted from the organic light emitting layer enters the first electrode through the first functional layer, is reflected by the first electrode, and is emitted outside through the first functional layer, the organic light emitting layer, the second functional layer, and the second electrode; and a second optical path in which remaining part of the blue light emitted from the organic light emitting layer travels to the second electrode through the second functional layer without travelling toward the first electrode, and is emitted outside through the second electrode, the first functional layer has an optical film thickness ranging from 48 nm to 62 nm, the second electrode is a stack of a first conductive layer made of a translucent conductive material, a metal layer, and a second conductive material made of a translucent conductive material stacked in this order from a side close to the organic light emitting layer, the first conductive layer has a refractivity ranging from 2.0 to 2.4, and has a film thickness ranging from 85 nm to 97 nm, and the metal layer has a refractivity which is different by 0 to 2.0 from the refractivity of the first conductive layer, and has a film thickness ranging from 2 nm to 22 nm.