| 摘要 |
Provided is an organic EL emission device that can suppress the occurrence of leak current as a result of an organic functional layer covering the lateral surfaces of a positive electrode layer and the positive electrode layer and a negative electrode layer being near to each other. The present invention includes an organic EL element in which the positive electrode layer, the organic functional layer, and the negative electrode layer are laminated on a substrate, and when the substrate is viewed in plan view, the positive electrode layer, the organic functional layer, and the negative electrode layer are superimposed. The organic functional layer is formed by laminating, from the positive electrode layer side, a hole transport property layer and an emission layer, in that order. The hole transport property layer includes a hole injection layer and a hole transport layer, and is in contact with the positive electrode layer and also with the emission layer. When the organic EL element is viewed in cross section view, at least a portion of the lateral surfaces of the positive electrode layer is covered by the organic functional layer, and the average thickness of the hole transport property layer is 0.5 to 1.5 times the average thickness of the positive electrode layer. |
