Organic EL element and manufacturing method

Abstract

A high quality organic EL element preventing the quality degradation and poor conduction caused by the electrode processing damage and a manufacturing method with the same are provided. The organic EL element comprises: a first electrode (13); a protective layer (15) formed on the first electrode (13) with an opening for uncovering the same; an insulation layer (17) on the protective layer (15); an organic layer (19) comprising a light-emitting layer on the region starting from the insulation layer (17) and till the uncased first electrode (13); and a second electrode (21) formed on the organic layer (19), wherein the film of the organic layer (19) is thicker than the one of the protective layer.

Description

technical field [0001] The present invention relates to an organic EL element and its manufacturing method. Background technique [0002] An organic electroluminescence element (organic electroluminescence (EL) element) is an element that excites and emits light by applying an electric field to an organic fluorescent compound. Such organic EL elements have characteristics such as self-luminescence, wide viewing angle, high response speed, low driving voltage, and full color. They are currently being put into practical use and can be applied to small displays, panels, outdoor screens, computers, and televisions. Color flat panel display components such as screens, etc. [0003] The organic EL element has a structure in which an organic layer having light-emitting properties is sandwiched between two electrodes. When a DC voltage is applied to both electrodes, holes are injected into the organic layer from the anode, and electrons are injected into the organic layer from the...

AI Technical Summary

Problems solved by technology

[0008] However, according to the above technique, since the film thickness of the protective film is thick, the luminescent layer and the second electrode are broken due to the level difference or the depression of the protective film, and conduction failure of the upper electrode (cathode electrode) 21 occurs.

That is, a step corresponding to the thickness of the protective film is formed on the side wall of the protective film, or a depression generated by side etching (side etching) when the protective film is formed. The light-emitting layer is broken due to poor steps, or the depression cannot be buried in the light-emitting layer, so there is a problem that the light-emitting layer may break near the depression

Moreover, the second electrode laminated on the light-emitting layer is also likely to break

Therefore, poor conduction of the second electrode and poor operation of the organic EL element itself occur.

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