ORGANIC ELECTROLUMINESCENT ELEMENT AND ILLUMINATION DEVICE

摘要

This organic electroluminescent element includes: a substrate having light transmissivity; and an organic light emitting body including a first electrode, an organic light emitting layer, and a second electrode. The organic electroluminescent element includes a resin part which includes a first resin layer and a second resin layer between the substrate and the organic light emitting body. The resin part includes an uneven interface between the first resin layer and the second resin layer. The uneven interface includes a first uneven structure and a second uneven structure, and protrusions and recesses of the second uneven structure are smaller than protrusions and recesses of the first uneven structure. The second uneven structure has a random arrangement of the protrusions and recesses thereof.

主权项

1. An organic electroluminescent element comprising:
a substrate having light transmissivity; an organic light emitting body including a first electrode, an organic light emitting layer and a second electrode; and a resin part which includes a first resin layer and a second resin layer and is disposed between the substrate and the organic light emitting body, the resin part including an uneven interface between the first resin layer and the second resin layer, the uneven interface including a first uneven structure and a second uneven structure, protrusions and recesses of the second uneven structure being smaller than protrusions and recesses of the first uneven structure, the second uneven structure having a random arrangement of the protrusions and recesses thereof ten point mean roughness Rz of the second uneven structure being larger than 100 nm and smaller than 200 nm, and heights of the protrusions and recesses of the first uneven structure being 0.4 to 10 μm.