Electroluminescence device and manufacturing method thereof

摘要

Light emitted within an organic EL device is effectively utilized, and a pixel is provided for improving the extraction efficiency of the light. Light extraction is efficiency is improved without increasing a current by effectively utilizing guided wave light which is a cause of the loss of light emitted by an organic EL device. In order to achieve this, a stepped portion is arrange in an insulating layer provided over a lower layer of a first electrode including a light reflecting surface, and a peripheral area of the first electrode is formed so as to contact the stepped portion. The reflecting surface is formed curved towards a second electrode side in the peripheral area of the first electrode from the stepped portion, light guided through the organic EL layer is reflected by the reflecting surface and emitted from the second electrode side.

主权项

1. An electroluminescence device comprising:
an insulating layer over a substrate; a first electrode including a light reflecting surface over the insulating layer; a bank layer covering a peripheral area of the first electrode; an electroluminescence layer over the first electrode; and a second electrode having an optical transparency over the electroluminescence layer; wherein the insulating layer includes a stepped portion having a first main surface, a second main surface, and a tilted surface between the first main surface and the second main surface, the tilted surface curved towards a second electrode side in the peripheral area of the first electrode, the first electrode has an area which does not overlap the bank layer, the first main surface includes a first region facing the area and a second region intersecting at an angle to a first end of the tilted surface, the second main surface intersects at an angle to a second end of the tilted surface, the second end being opposite to the first end, and is located above an opposite side of the first main surface from the substrate, and the peripheral area of the first electrode is provided along the tilted surface of the stepped portion.