Organic electroluminescence element

摘要

The present invention relates to an organic electroluminescence element in which a transparent first electrode, an organic light emitting layer, a second electrode are stacked on a translucent substrate in this order. The translucent substrate includes a moisture-proof layer facing the first electrode. An LR layer and an HR layer having a refractive index higher than a refractive index of the LR layer are situated between the moisture-proof layer and the first electrode in this order from the moisture-proof layer. An uneven structure is provided at an interface between the LR layer and the HR layer. A linear expansivity α of the moisture-proof layer, and a linear expansivity β of the LR layer, and a linear expansivity γ of the HR layer satisfy a relation of α≦β≦γ.

主权项

1. An organic electroluminescence element, comprising:
a translucent substrate; a first electrode with light transmissive properties; an organic light emitting layer; a second electrode; an LR layer; an HR layer having a refractive index higher than a refractive index of the LR layer; an uneven structure provided at an interface between the LR layer and the HR layer; a groove region dividing at least the HR layer; and an auxiliary wire provided inside the groove region, the first electrode, the organic light emitting layer, and the second electrode being stacked on the translucent substrate in this order, the translucent substrate including a moisture-proof layer facing the first electrode, the LR layer and the HR layer being situated between the moisture-proof layer and the first electrode in this order from the moisture-proof layer, the organic electroluminescence element satisfying a relation of α≦β≦γ, wherein α denotes a linear expansivity of the moisture-proof layer, β denotes a linear expansivity of the LR layer, and γ denotes a linear expansivity of the HR layer, the groove region being constituted by a plurality of straight grooves extending in a horizontal direction and in a vertical direction, the groove region having a mesh-like shape, a grid-shape, or a lattice shape, the auxiliary wire being in contact with the first electrode and having a shape corresponding to a shape of the groove region in a plan view, and parts of the first electrode being formed inside the groove region.