Organic El element and manufacturing method thereof and display device

Abstract

The present invention provides an organic EL element and a manufacturing method thereof. The organic EL element (headlight) of the present invention has a support substrate (16) and an element portion (30) provided on the support substrate. The element portion ( 30) comprising an anode (22), a light-emitting layer (37) comprising an organic EL material, and a cathode (38) stacked in sequence, and the element part (30) has an illuminated body for displaying through the organic EL element. An opening (35) penetrating through the element portion (30) and a light emitting portion (21) for illuminating the illuminated body are formed. Accordingly, it is possible to realize an organic EL element having a high light transmittance in the light-transmitting portion and to be suitable for an illumination device of a display device, and to provide a method for manufacturing the organic EL element easily and with high yield.

Description

technical field [0001] The present invention relates to an organic electroluminescence (Electro-Luminescence, EL) element and its manufacturing method, and a display device, in particular to an organic EL element suitable for being arranged in front of an irradiated body and displaying through the irradiated body and its method. Manufacturing method. Background technique [0002] In recent years, devices using organic EL elements have attracted attention as headlights (illuminators) of non-emissive display devices such as reflective liquid crystal panels. display device for use. The basic structure of an organic EL element can be, for example, a structure in which a transparent electrode (anode), a light-emitting layer, and a metal electrode (cathode) are laminated on a glass substrate. A material with a large work function is used for the anode, and a material with a small work function is used for the cathode. , Organic EL materials are used in the light-emitting layer. ...

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Problems solved by technology

In this way, since the activity of alkaline earth metals such as Ca (calcium) contained in the cathode is high, there is a problem that it is difficult to manufacture organic EL elements with high yields.

[0006] Furthermore, in order to reduce the complexity of the pattern forming process, it is possible to form the anode and the like that may be made of a light-transmitting material on the entire surface, but with such a structure, it is impossible to avoid the decrease in light transmittance when used as a headlight. decline

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