| 摘要 |
<p>Provided is an organic light-emitting device in which, in order to improve the external quantum efficiency of an organic light-emitting element and a light source device using the same, a first light extraction layer is formed on the surface of a second substrate at the side of the surface where a second electrode is present, a second light extraction layer is formed on the surface of the second substrate at the side of the surface where the second electrode is not present, microparticles and a binder are included in the first light extraction layer, microparticles and a binder are included in the second light extraction layer, the average grain size of the microparticles included in the first light extraction layer is 0.05 µm to 2 µm, the average grain size of the microparticles included in the second light extraction layer is 1 µm to 10 µm, the optical length (L1) between the light emission point of a light-emitting layer and the first electrode satisfies (Expression 1). (Expression 1): (2m-155/180) 0/4/cos35°=L1=(2m-155/180) 0/4/cos50° (where 0 is the light emission central wavelength of the light-emitting layer, and m is an integer of 1 or more).</p> |
