| 摘要 |
An organic EL element includes: an organic EL layer including a transparent electrode, a reflective electrode, and a light-emitting layer; a transparent layer disposed on a light-exiting side of the transparent electrode; and a light extraction structure disposed on a light-exiting side of the transparent layer and having a protruding shape with inclined portions. The transparent layer and the light extraction structure have a larger refractive index than the light-emitting layer. The inclined portions of the light extraction structure satisfy Condition 1 or 2 for extracting guided wave light emitted from the light-emitting layer and incident on the light extraction structure from the light extraction structure to the outside of the organic EL element, in a cross section taken along a plane perpendicular to the reflective electrode, where two inclination angles phi1 and phi2 formed between the reflective electrode and the inclined portions are the largest. |
