LIGHT-EMITTING DEVICE AND DESIGN METHOD FOR LIGHT-EMITTING DEVICE

To provide a light-emitting device capable of having improved light extraction efficiency, and a design method for the light-emitting device.SOLUTION: A light-emitting device according to an embodiment includes a transparent substrate, a transparent electrode, a reflection electrode, and a light-emitting layer. The transparent electrode is disposed on the transparent substrate, and the light-emitting layer is disposed between the transparent electrode and the reflection electrode. The light-emitting device includes a light extraction layer disposed between the transparent substrate and the transparent electrode, and is used to extract light generated in the light-emitting layer to the outside. The peak position of the light distribution in the case based on the thickness direction of the light extraction layer when the light generated in the light-emitting layer enters the light extraction layer through the transparent electrode is 30° or more and 55° or less.SELECTED DRAWING: Figure 2 【課題】光取出し効率の向上が可能な発光デバイスおよび発光デバイスの設計方法を提供する。【解決手段】一形態に係る発光デバイスは、透明基板、透明電極、反射電極および発光層を備える発光デバイスであって、透明電極は、透明基板上に配置されており、発光層は、透明電極と反射電極との間に配置されている、発光デバイスであって、透明基板と透明電極との間に配置され、発光層で生じた光を外部に取り出すための光取出し層を備え、発光層で生じた光が透明電極を介して光取出し層に入射する際の光取出し層の厚さ方向を基準にした場合の配光分布のピーク位置が３０°以上５５°以下である。【選択図】図２