JP2017204329A - Method for manufacturing organic electroluminescent element and organic electroluminescent element - Google Patents

Abstract

Kind Code: A1 A method for manufacturing an organic EL element is provided, in which an organic EL layer having a uniform thickness can be obtained and the manufacturing efficiency can be improved. A non-light-emitting region having a plurality of first electrodes arranged in the length direction of a long base material, and the first electrodes having first power supply portions projecting in the width direction of the long base material. and a step of preparing a first electrode base material 10 including a light-emitting region narrower than the non-light-emitting region; A step of applying the organic EL layer-forming composition continuously in the length direction of the first electrode substrate to form an organic EL layer 3 so as to be exposed, and covering the light emitting region and from the width of the organic EL layer a step of disposing the second electrode 4 so as to have a protruding second power supply portion and not to contact the first power supply portion; A method for manufacturing an organic EL element 100, comprising the step of continuously arranging the sealing member 5 in the length direction of the first electrode base material. [Selection drawing] Fig. 1

Description

  Embodiments of the present disclosure relate to a method for manufacturing an organic electroluminescence element.

  The organic electroluminescence element has high visibility due to self-coloring, is an all-solid-state display unlike a liquid crystal display device, has excellent impact resistance, has a fast response speed, is less affected by temperature changes, and Advantages such as a wide viewing angle are attracting attention. Hereinafter, organic electroluminescence may be abbreviated as organic EL.

  By the way, the following manufacturing method is conventionally employ | adopted for the purpose of the improvement of manufacturing efficiency in an organic EL element. That is, a step of arranging a plurality of first electrodes in the length direction on a long base material, and an organic EL layer forming composition is continuously applied on the plurality of first electrodes, and the entire surface of each first electrode is applied. A step of forming an organic EL layer, a step of wiping or trimming an outer peripheral portion of the organic EL layer formed on each first electrode along the width direction of the long base material, and a first feeding portion; On the organic EL layer formed on the first electrode, a step of forming the second electrode in the width direction of the long base material of the organic EL layer, and a first adjacent to the length direction of the long base material The manufacturing method which has the process of cut | disconnecting from between electrodes, and the process of forming a sealing member so that a 1st electric power feeding part may be exposed on an organic electroluminescent layer is employ | adopted.

JP 2011-49084 A

  By the way, in the manufacturing method of the conventional organic EL element mentioned above, an organic EL layer is continuously formed on the some 1st electrode arrange | positioned on a elongate base material. Therefore, the thickness of the organic EL layer can be made uniform. Further, since it is not necessary to form an organic EL layer for each first electrode, it is also effective in terms of manufacturing efficiency. On the other hand, when the organic EL layer is continuously formed on the plurality of first electrodes, the entire surface of the first electrode is covered with the organic EL layer. Therefore, after the formation of the organic EL layer, a part of the organic EL layer formed on each first electrode is wiped off to form a first power feeding unit that functions as a take-out electrode. It has been demanded.

  The present disclosure has been made in view of the above-described problems, and an organic EL layer having a uniform thickness can be obtained, and a wiping process of the organic EL layer for providing the first power feeding portion on the first electrode is required. The main object of the present invention is to provide a method of manufacturing an organic EL element capable of improving the manufacturing efficiency.

  One embodiment of the present disclosure includes a long base that is long, and a plurality of first electrodes that are arranged in a length direction of the long base, and the first electrode is the long base. A first electrode base material preparation step for preparing a first electrode base material, which includes a non-light emitting region having a first power feeding portion protruding in a width direction of the base material and a light emitting region narrower than the non-light emitting region; Organic electroluminescence is continuously performed in the length direction of the first electrode substrate so that the first power feeding portion of the non-light emitting region is exposed to be wider than the light emitting region and narrower than the non-light emitting region. An organic electroluminescent layer forming step of applying the luminescent layer forming composition to form an organic electroluminescent layer; and a second feeding part that covers the light emitting region and protrudes from the width of the organic electroluminescent layer; The second electrode placement step of placing the second electrode so as not to contact the first feeding portion, and the first electrode having a width wider than the width of the organic electroluminescence layer and exposing the first feeding portion. There is provided a method for producing an organic electroluminescent element, comprising: a sealing member arranging step of continuously arranging a sealing member in a length direction of a substrate.

  In one embodiment of the present disclosure, after the sealing member arranging step, the first electrode base material is placed between the plurality of first electrodes adjacent to each other in the length direction of the first electrode base material. The manufacturing method of the organic EL element which has the cutting process cut | disconnected in the width direction of 1 electrode base material is provided.

  One embodiment of the present disclosure includes a long base that is long, and a plurality of first electrodes that are arranged on the long base and are arranged in a length direction of the long base. An electrode base material, an organic electroluminescence layer continuously disposed in a length direction of the first electrode base material on the surface of the first electrode base material on the side where the first electrode is disposed, and the above The length of the first electrode substrate on the second electrode on the surface opposite to the elongated substrate of the organic electroluminescence layer and on the surface of the second electrode opposite to the elongated substrate. A non-light-emitting region having a first power feeding portion protruding in the width direction of the long base material, and an organic electroluminescence element having a sealing member arranged continuously in a direction, And a light emitting region having a narrower width than the non-light emitting region, and the organic electroluminescence layer The first electrode is disposed in a width wider than the light emitting region and narrower than the non-light emitting region so that the first power feeding portion of the non-light emitting region is exposed, and the second electrode covers the light emitting region, And it has the 2nd electric supply part which protruded from the width of the organic electroluminescence layer, and is arranged so that it may not contact with the 1st electric supply part, and the sealing member is wider than the width of the organic electroluminescence layer, And the organic electroluminescent element arrange | positioned with the width | variety which the said 1st electric power feeding part exposes is provided.

  In one embodiment of the present disclosure, the thickness of the organic EL layer can be made uniform, and the wiping process of the organic EL layer for providing the first feeding portion on the first electrode is not required, so that the manufacturing efficiency is improved. There is an effect that can be achieved.

It is a schematic process drawing which shows an example of the manufacturing method of the organic EL element in one embodiment of this indication. It is a schematic sectional drawing which shows the other example of the organic EL element in 1 embodiment of this indication. It is explanatory drawing for demonstrating the 1st electric power feeding part and the 2nd electric power feeding part of the organic EL element in 1 embodiment of this indication. It is explanatory drawing for demonstrating the 1st electrode of the organic EL element in one embodiment of this indication. It is a schematic process drawing which shows the other example of the manufacturing method of the organic EL element in one embodiment of this indication. It is the schematic plan view and schematic sectional drawing which show an example of the organic EL element in one embodiment of this indication. It is a schematic plan view which shows the other example of the organic EL element in 1 embodiment of this indication. It is the schematic plan view and schematic sectional drawing which show the other example of the organic EL element in 1 embodiment of this indication. It is a schematic plan view which shows the other example of the organic EL element in 1 embodiment of this indication.

  In this specification, when a certain configuration such as a certain member or a certain region is “above (or below)” another configuration such as another member or another region, unless otherwise limited, This includes not only when directly above (or directly below) another configuration, but also when above (or below) another configuration, i.e., another configuration above (or below) another configuration. This includes cases where elements are included.

  Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. However, the present disclosure can be implemented in many different modes, and should not be construed as being limited to the description of the embodiments described below. Further, in order to clarify the description, the drawings may be schematically represented with respect to the width, thickness, shape, etc. of each part as compared with the embodiment, but are merely examples, and the interpretation of the present disclosure may be interpreted. It is not limited. In addition, in the present specification and each drawing, elements similar to those described above with reference to the previous drawings are denoted by the same reference numerals, and detailed description may be omitted as appropriate. Further, for convenience of explanation, the description may be made using the terms “upper” or “lower”, but the vertical direction may be reversed.

A. Manufacturing method of organic EL element The manufacturing method of the organic EL element in one embodiment of this indication has the elongate base material which is elongate, and the some 1st electrode arranged in the length direction of the said elongate base material. And the first electrode includes a non-light-emitting region having a first power feeding portion protruding in the width direction of the long base material and a light-emitting region narrower than the non-light-emitting region. A first electrode base material preparing step for preparing the first light-emitting region, and the first power feeding portion of the non-light-emitting region is exposed at a width wider than the light-emitting region and narrower than the non-light-emitting region. An organic electroluminescence layer forming step of coating the organic electroluminescence layer forming composition continuously in the length direction of the electrode substrate to form an organic electroluminescence layer, covering the light emitting region, and A second electrode arranging step of arranging a second electrode so as not to come into contact with the first power feeding unit, and having a second power feeding part protruding from the width of the luminescence layer; and wider than the width of the organic electroluminescence layer, And the sealing member arrangement | positioning process which arrange | positions a sealing member continuously in the length direction of a said 1st electrode base material with the width | variety which the said 1st electric power feeding part exposes is a manufacturing method.

One embodiment of the present disclosure will be described with reference to the drawings.
FIG. 1 is a schematic process diagram illustrating an example of a method for manufacturing an organic EL element according to an embodiment of the present disclosure. In the manufacturing method of the organic EL element in one embodiment of the present disclosure, first, as illustrated in FIG. 1A, the long base 1 that is long and the length of the long base 1 are arranged in the length direction. The first electrode 2 includes a non-light emitting region having a first power feeding portion projecting in the width direction of the long base material 1 and a light emitting region narrower than the non-light emitting region. A first electrode base material preparation step of preparing the first electrode base material 10 to be included.

Here, “light emitting region” and “non-light emitting region” are defined. First, the “light emitting region” refers to a region that emits light when the organic EL element in one embodiment of the present disclosure is driven. Further, the “non-light emitting region” refers to a region that does not emit light when the organic EL element according to one embodiment of the present disclosure is driven. 2A and 2B are explanatory diagrams for explaining the light emitting region. 2A is a schematic plan view, and FIG. 2B is a schematic perspective view. Since the “light emitting region” in one embodiment of the present disclosure is a region that emits light when the organic EL element is driven, as shown in FIGS. 2A and 2B, at least the first electrode 2, the organic This is a region L where the EL layer 3 and the second electrode 4 overlap in plan view. Therefore, in one embodiment of the present disclosure, the “light emitting region” and the “non-light emitting region” are defined by forming the first electrode, the organic EL layer, and the second electrode. Reference numeral L ₂ in FIG. 2 (b), refers to the light-emitting region in the first electrode, reference numeral L ₃ refers to the light-emitting region in the organic EL layer, reference numeral L ₄ are, it refers to the light-emitting region in the second electrode.

Next, the “first power feeding unit” will be defined. The “first power supply unit” refers to a region for supplying power to the first electrode in the organic EL element according to one embodiment of the present disclosure. Usually, when the organic EL element is viewed in plan, the first electrode It refers to the exposed area in the non-light emitting area. That is, the first power feeding unit may be the entire non-light-emitting region in the first electrode, or may be a part of the non-light-emitting region in the first electrode. For example, in the enlarged view surrounded by a broken line shown in FIG. 3, the area defined by the length S, the length S ₂ is the first power source. Therefore, the first power supply unit is defined by stacking the first electrode, the organic EL layer, the second electrode, and the sealing member.
Further, “coating the organic EL layer forming composition continuously in the length direction to form the organic EL layer” means that a plurality of first electrodes are arranged in the length direction of the long base material. The organic EL layer forming composition is applied onto two or more first electrodes adjacent in the length direction, and the obtained organic EL layer is integrally formed on the two or more first electrodes. Means.

Furthermore, the "narrow emission region width than the non-emitting region", for example, as shown in FIG. 2 (b) and FIG. 4 (a) ~ (d) , the length in the width direction of the non-light-emitting region D _w and then, when the length in the width direction of the light-emitting region was set to L _w, a length L _w of the width direction of the light emitting region, it means made it smaller than the length D _w in the width direction of the non-light-emitting region.

  Next, as shown in FIG. 1B, the method for manufacturing an organic EL element according to one embodiment of the present disclosure is wider than the width of the light emitting region and narrower than the width of the non-light emitting region. The organic EL layer forming step of forming the organic EL layer 3 by applying the organic EL layer forming composition continuously in the length direction of the first electrode substrate 10 so as to expose one power feeding portion.

Here, “the width that is wider than the width of the light emitting region and narrower than the width of the non-light emitting region” means, for example, the length in the width direction of the light emitting region in the first electrode 2 as shown in FIG. and then, the length in the width direction of the non-light emitting region in the first electrode 2 and D _w, when the length in the width direction of the organic EL layer 3 and E _w, length in the width direction of the organic EL layer 3 E _w means that greater than the length L _w of the width direction of the light-emitting region, and smaller than the width direction length D _w of the non-light emitting region in the first electrode 2 in the first electrode 2.

  In addition, “coating the organic EL layer forming composition continuously in the length direction of the first electrode base material to form the organic EL layer” means that a plurality of the first electrode base materials are formed in the length direction of the first electrode base material. In the state where the electrodes are arranged, the organic EL layer forming composition is applied onto two or more first electrodes adjacent in the length direction, and the obtained organic EL layer is formed on the two or more first electrodes. It means that it is formed as one piece.

  The manufacturing method of the organic EL element in one embodiment of the present disclosure has a second power feeding unit that covers the light emitting region and protrudes from the width of the organic EL layer 3 as shown in FIG. There is a second electrode arrangement step of arranging the second electrode 4 so as not to contact the first power feeding unit.

Here, the “second power feeding unit” is defined. The “second power supply unit” refers to a region for supplying power to the second electrode in the organic EL element according to one embodiment of the present disclosure. That is, a 2nd electric power feeding part points out a part in 2nd electrode instead of the whole 2nd electrode. For example, in the enlarged view surrounded by a broken line shown in FIG. 3, the area defined by the length S, the length S ₄ is a second feeding portion. Therefore, the second power feeding unit is defined by stacking the first electrode, the organic EL layer, the second electrode, and the sealing member.

  Next, as shown in FIG. 1D, the manufacturing method of the organic EL element according to one embodiment of the present disclosure is wider than the width of the organic EL layer 3 and the width at which the first feeding portion is exposed. It has the sealing member arrangement | positioning process which arrange | positions the sealing member 5 continuously in the length direction of the base material 10. FIG.

  Here, “the width that is wider than the width of the organic EL layer and the first power feeding portion is exposed” is, for example, as shown in FIG. 2B, the length in the width direction of the organic EL layer is Ew, When the length in the width direction of the non-light-emitting region having the first power feeding portion protruding in the width direction in the first electrode 2 is Dw, the length is longer than the length Ew in the width direction of the organic EL layer, and the first electrode 2 It means that it is smaller than the length Dw of the non-light-emitting area | region which has the 1st electric power feeding part protruded in the width direction in width direction.

  In addition, “disposing the sealing member continuously in the length direction of the first electrode base material” means that the plurality of first electrodes are arranged in the length direction of the first electrode base material, It means that the sealing member is integrally formed on two or more first electrodes adjacent in the vertical direction.

  The manufacturing method of the organic EL element in one embodiment of the present disclosure may include a process as shown in FIG. That is, after the sealing member arranging step shown in FIG. 1D, the first electrode substrate 10 is moved from the plurality of first electrodes 2 adjacent to each other in the length direction of the first electrode substrate 10 to the first electrode. You may have the cutting process cut | disconnected in the width direction of the base material 10. FIG.

  Here, “cutting in the width direction of the first electrode base material” means cutting at least the first electrode base material. Therefore, for example, as shown in FIG. 1 (e), the first electrode substrate 10 and the organic EL layer 3 are formed in a region between the plurality of first electrodes 2 adjacent to each other in the length direction of the first electrode substrate 10. And when the sealing member 5 is laminated | stacked, it means cutting the laminated body which has the 1st electrode base material 10, the organic EL layer 3, and the sealing member 5. FIG.

  In one embodiment of the present disclosure, the thickness of the organic EL layer can be made uniform, and the wiping process of the organic EL layer for providing the first feeding portion on the first electrode is not required, so that the manufacturing efficiency is improved. There is an effect that can be achieved. The reason why such an effect can be obtained is presumed as follows.

That is, in one embodiment of the present disclosure, a plurality of first electrodes are arranged on a long base material, and an organic EL layer forming composition is continuously applied onto the plurality of first electrodes, thereby forming an organic EL A layer can be formed. Therefore, compared with the case where the organic EL layer forming composition is applied to each first electrode to form the organic EL layer, the number of manufacturing steps can be reduced, and the manufacturing efficiency can be improved.
Moreover, when apply | coating an organic electroluminescent layer formation composition separately on each 1st electrode, it exists in the tendency for the thickness of the organic electroluminescent layer obtained to vary easily on a manufacturing process. On the other hand, in one embodiment of the present disclosure, in order to apply the organic EL layer forming composition onto the plurality of first electrodes at a time, the organic EL layer forming composition is individually applied onto each first electrode. As compared with, the thickness of the obtained organic EL layer can be made uniform.

  Furthermore, in the conventional method for manufacturing an organic EL element, when a plurality of first electrodes are arranged on a long base material and the organic EL layer forming composition is applied onto the plurality of first electrodes at a time, the first electrode When the organic EL layer forming composition is applied to the entire surface, the first power feeding unit cannot be secured. Therefore, in the conventional method for manufacturing an organic EL element, a part of the organic EL layer forming composition applied to the entire surface of the first electrode is wiped off to form the first power feeding unit. On the other hand, in one embodiment of the present disclosure, since the first electrode has the first power feeding portion even after the organic EL layer forming composition is applied, the entire surface of the first electrode is conventionally provided. The process of wiping off a part of the organic EL layer forming composition applied to is not required. Therefore, the number of manufacturing steps can be reduced and manufacturing efficiency can be improved as compared with the conventional method for manufacturing an organic EL element.

  Furthermore, in one embodiment of the present disclosure, after the organic EL layer and the second electrode are stacked on each first electrode, the first electrode and the like arranged in the length direction of the long base material are covered. The sealing members can be arranged continuously at a time. Therefore, it is not necessary to dispose a sealing member for each organic EL layer and second electrode stack disposed on each first electrode, so that the number of manufacturing steps can be reduced and manufacturing efficiency can be improved. be able to.

  Moreover, in one embodiment of this indication, since the obtained organic EL element has the 1st electric power feeding part and the 2nd electric power feeding part for every pixel, the influence by a voltage drop can be suppressed. Furthermore, when it has the cutting process which cut | disconnects the obtained organic EL element to each pixel, the organic EL element cut | disconnected to each pixel will have a 1st electric power feeding part and a 2nd electric power feeding part separately. Therefore, for example, when a defect such as a defect occurs in one pixel, only the one pixel can be replaced or repaired alone, so that the organic EL element can be easily handled.

  Hereinafter, each process in one embodiment of this indication is explained.

1. First electrode base material preparation step The first electrode base material preparation step in one embodiment of the present disclosure includes a long base material that is long, and a plurality of first electrodes that are arranged in the length direction of the long base material. A first electrode base material is prepared, the first electrode including a non-light emitting region having a first power feeding portion protruding in the width direction of the long base material and a light emitting region narrower than the non-light emitting region. It is a process to do.

  As a method of arranging a plurality of first electrodes in the length direction on a long substrate, for example, a method of arranging a first electrode formed in advance on a long substrate, or directly on a long substrate The method of forming a 1st electrode is mentioned. When the first electrode is directly formed on the long base material, the first electrode is formed by, for example, a vacuum deposition method, a sputtering method, an EB deposition method, an ion plating method, a PVD method, a CVD method, or the like. Is mentioned.

  Although the several 1st electrode arrange | positioned on a long base material is arranged in the length direction of a long base material, it is preferable to arrange | position regularly especially. Here, “regular” means that the long base material is arranged so as not to be displaced in the width direction on a straight line in the length direction of the long base material. By arranging the plurality of first electrodes regularly, it is easy to position the organic EL layer and the sealing member on the plurality of first electrodes in the organic EL layer forming step and the sealing member arranging step described later. Can be performed.

  In one embodiment of the present disclosure, for example, as shown in FIG. 9A described later, a plurality of first electrodes 2 are arranged in the width direction as well as the length direction of the long base material 1. be able to. Also in this case, it is preferable that the plurality of first electrodes be regularly arranged.

  It is preferable that two adjacent first electrodes on the long base material have a predetermined interval in the length direction of the long base material. The interval between adjacent first electrodes refers to, for example, the distance indicated by the symbol G in FIG. The interval in one embodiment of the present disclosure is, for example, preferably 100 μm or more, more preferably 500 μm or more, and particularly preferably 1000 μm or more. Moreover, it is preferable that the said space | interval in one embodiment of this indication is 30 mm or less, for example, it is preferable that it is 20 mm or less especially, and it is especially preferable that it is 10 mm or less. When the interval between the adjacent first electrodes is within the above range, when one embodiment of the present disclosure includes a cutting step described later, it is easy to perform in the width direction of the long base material from between the adjacent first electrodes. It is possible to cut it. In addition, although it described about the space | interval of the 1st electrode adjacent to the length direction of a elongate base material here, when several 1st electrodes are arrange | positioned in the width direction of a elongate base material, it is long The same may be said of the space | interval of the 1st electrode adjacent to the width direction of a base material.

  Hereinafter, the first electrode and the long base material used in the first electrode base material preparation step will be described.

(1) 1st electrode The 1st electrode arranged in the length direction of a long base material in the 1st electrode base material preparatory process has the 1st electric supply part which protrudes in the width direction of a long base material, and does not emit light It includes a light emitting region that is narrower than the region and the non-light emitting region.

  It is preferable that the 1st electrode arrange | positioned on a elongate base material in a 1st electrode base material preparatory process has a predetermined shape. Here, the light-emitting region and the non-light-emitting region in the first electrode, and the first power feeding unit in the non-light-emitting region are usually defined after an organic EL layer, a second electrode, and a sealing member described later are disposed. Therefore, the light-emitting region and the non-light-emitting region in the first electrode, and the first power feeding unit in the non-light-emitting region are appropriately adjusted according to the shape and position of the organic EL layer, the second electrode, the sealing member, and the like described later can do. On the other hand, in one embodiment of the present disclosure, as will be described later, the organic EL layer and the sealing member are formed or arranged at a time on the plurality of first electrodes. Therefore, in order to have a configuration in which the first electrode has a light emitting region and a non-light emitting region, and the non-light emitting region has the first power feeding unit, the shape of the organic EL layer and the sealing member, the position where the sealing member is disposed, and the like It is preferable to preliminarily form the first electrode in a predetermined shape rather than adjusting. As a specific shape of the first electrode, for example, as shown in FIG. 4 (a), a shape having protrusions 2a protruding in the width direction of the long base material, a so-called H shape, as shown in FIG. As shown in FIG. 4 (b), a shape having projections 2a projecting in the width direction of the long substrate on three sides of the quadrangular shape, or a square as shown in FIG. 4 (c). A shape having protrusions 2a protruding in the width direction of the long base material on two of the four sides of the shape, or a long shape on one of the four sides of the quadrangular shape as shown in FIG. The shape which has the protrusion part 2a protruded in the width direction of the base material is mentioned.

  When the shape of the first electrode is H-shaped, it is preferable that the protruding portion protruding in the width direction of the long base material becomes the first power feeding portion in the non-light emitting region. Therefore, when the shape of the first electrode is an H shape, the size of the protrusion is preferably a size that can exhibit the function as the first power feeding unit, and is appropriately determined according to the design of the organic EL element. Can be adjusted.

  The first electrode used in the first electrode base material preparation step may or may not have optical transparency. In one embodiment of the present disclosure, a first electrode having optical transparency is usually used.

  The material used for the first electrode is not particularly limited as long as it is a conductive material that can be used for a general organic EL element. For example, a conductive material with low resistance is preferable, and examples thereof include metal materials, organic compounds, and inorganic compounds. Among them, it is preferable to use a conductive material having a large work function so that holes can be easily injected. For example, metals such as Au, Cr, and Mo; indium tin oxide (ITO), indium zinc oxide (IZO), and zinc oxide And inorganic oxides such as indium oxide; and conductive polymers such as metal-doped polythiophene. For the first electrode, the above-described conductive material may be used alone, or two or more kinds may be used in combination. When using 2 or more types, you may laminate | stack the layer which consists of each material.

  The thickness of the first electrode can be adjusted as appropriate according to the use of the organic EL element, and can be the same as the thickness of the first electrode in a general organic EL element, so the description here is omitted. To do.

  The first electrode can be fed by the first feeding unit.

(2) Long base material The long base material used in a 1st electrode base material preparatory process is a member by which the several 1st electrode mentioned above is arrange | positioned. Therefore, the distance in the length direction of the long base material is preferably a distance that allows at least two or more first electrodes to be arranged, and is appropriately adjusted according to the size or the like of the first electrode. Can do. In addition, the distance of the length direction of a elongate base material points out the distance shown with the code | symbol L of Fig.1 (a), for example.
Further, the distance in the width direction of the long base material is preferably a distance that allows at least one first electrode to be arranged, and can be appropriately adjusted according to the size of the first electrode. it can. The distance in the width direction of the long base material refers to, for example, the distance indicated by the symbol W in FIG.

  The long base material used in the first electrode base material preparation step may or may not have optical transparency. It can select suitably according to the use etc. of the organic EL element in 1 embodiment of this indication.

  Moreover, the elongate base material used in a 1st electrode base material preparatory process may have flexibility, and does not need to have it. Although it can select suitably according to the use etc. of the organic EL element in 1 embodiment of this indication, it is preferable that it has flexibility especially. It is because the sealing member arrangement | positioning process mentioned later can be performed using the roll-to-roll method. Moreover, it is because predetermined | prescribed flexibility can be provided to the organic EL element obtained by one embodiment of this indication.

  Examples of the material of the long base material include materials that can be used for a base material of a general organic EL element. For example, an inorganic material such as quartz or glass, an acrylic resin, or a cycloolefin polymer called COP And resins such as polycarbonate, polyethylene terephthalate, polybutylene terephthalate, polyphenylene sulfide, polyimide, polyamideimide, polyethersulfone, polyetherimide, and polyetheretherketone.

  The long base material preferably has a thickness that can support the first electrode, the organic EL layer, the second electrode, and the sealing member described later. For example, it can be 0.001 mm or more, and can be 5 mm or less.

2. Organic EL layer forming step The organic EL layer forming step in one embodiment of the present disclosure is wider than the width of the light emitting region and narrower than the width of the non-light emitting region, so that the first power feeding portion of the non-light emitting region is exposed. In this step, the organic EL layer forming composition is applied continuously in the length direction of the first electrode substrate to form an organic EL layer.

  The organic EL layer in the organic EL layer forming step is such that a part of the non-light-emitting region of the first electrode, that is, the portion that will later become the first power feeding portion is exposed in plan view and overlaps only the long base material. Preferably it is formed. For example, when the shape of the first electrode is H-shaped, as shown in FIG. 1B and FIGS. 4A to 4D, the protrusion 2a of the first electrode 1 is The organic EL layer 3 is preferably formed so as to be exposed and overlap only with the long base material 1.

  The organic EL layer in the organic EL layer forming step is formed by applying the organic EL layer forming composition continuously in the length direction of the first electrode substrate. Examples of the method for applying the organic EL layer forming composition include die coating, inkjet, spray coating, nozzle printing, slide coating, and the like. By applying the organic EL layer forming composition using the method described above, the first power feeding unit that covers the light emitting region and the non-light emitting region of the first electrode overlaps only the long base material in plan view, Thus, it becomes possible to apply the organic EL layer forming composition continuously in the length direction of the first electrode substrate.

  Hereinafter, the organic EL layer used in the organic EL layer forming step will be described.

  The organic EL layer formed in the organic EL layer forming step is a member having one or more organic layers including a light emitting layer. That is, the organic EL layer is a member including at least a light emitting layer, and is a member having a layer configuration of one or more organic layers. Usually, when forming an organic EL layer by a wet process, it is often composed of one or two organic layers because it is difficult to stack a large number of layers in relation to the solvent, It is possible to further increase the number of layers by devising organic materials or combining vacuum deposition methods.

  Examples of the layer constituting the organic EL layer other than the light emitting layer include a hole injection layer, an electron injection layer, a hole transport layer, and an electron transport layer. The hole transport layer may be integrated with the hole injection layer by imparting a hole transport function to the hole injection layer. In addition, the electron transport layer may be integrated with the electron injection layer by adding an electron transport function to the electron injection layer. Furthermore, as a layer which comprises an organic electroluminescent layer, the layer for preventing the penetration of a hole or an electron like a carrier block layer, and improving a recombination efficiency is mentioned.

  Hereinafter, each structure of the organic EL layer will be described.

(1) Light-emitting layer Examples of the material used for the light-emitting layer include light-emitting materials such as dye-based materials, metal complex-based materials, and polymer-based materials.

  Examples of dye-based materials include cyclopentadiene derivatives, tetraphenylbutadiene derivatives, triphenylamine derivatives, oxadiazole derivatives, pyrazoloquinoline derivatives, distyrylbenzene derivatives, distyrylarylene derivatives, silole derivatives, thiophene ring compounds, pyridine Examples thereof include ring compounds, perinone derivatives, perylene derivatives, oligothiophene derivatives, trifumanylamine derivatives, oxadiazole dimers, and pyrazoline dimers.

  Examples of the metal complex-based material include aluminum quinolinol complex, benzoquinolinol beryllium complex, benzoxazole zinc complex, benzothiazole zinc complex, azomethyl zinc complex, porphyrin zinc complex, and eurobium complex. Or a metal complex having a rare earth metal such as Tb, Eu, or Dy and having a oxadiazole, thiadiazole, phenylpyridine, phenylbenzimidazole, quinoline structure, or the like as a ligand.

  Furthermore, examples of the polymer material include polyparaphenylene vinylene derivatives, polythiophene derivatives, polyparaphenylene derivatives, polysilane derivatives, polyacetylene derivatives, polyvinylcarbazole, polyfluorene derivatives, polyquinoxaline derivatives, and copolymers thereof. Is mentioned.

  The light emitting layer may contain a doping agent for the purpose of improving the light emission efficiency and changing the light emission wavelength. Examples of the doping agent include perylene derivatives, coumarin derivatives, rubrene derivatives, quinacridone derivatives, squalium derivatives, porphyrin derivatives, styryl dyes, tetracene derivatives, pyrazoline derivatives, decacyclene, phenoxazone, quinoxaline derivatives, carbazole derivatives, fluorene derivatives, and the like. It is done.

  The thickness of the light emitting layer is not particularly limited as long as it can provide a function of emitting light by providing a recombination field between electrons and holes. For example, the thickness of the light emitting layer is about 1 nm to 500 nm. Can do.

  The light emitting layer may be formed in a pattern so as to have light emitting portions of a plurality of colors such as red, green, and blue. The light emitting layer may have a white light emitting portion. Thereby, an organic EL element capable of color display can be obtained.

(2) Hole injection layer and hole transport layer The hole transport layer may be integrated with the hole injection layer by imparting a hole transport function to the hole injection layer. That is, the hole injection layer may have only a hole injection function, or may have both a hole injection function and a hole transport function.

  The material used for the hole injection layer is not particularly limited as long as the material can stabilize the injection of holes into the light emitting layer. In addition, phenylamine, starburst amine, phthalocyanine, vanadium oxide, molybdenum oxide, ruthenium oxide, aluminum oxide, titanium oxide and other oxides, amorphous carbon, polyaniline, polythiophene, polyphenylene vinylene derivatives, etc. can be used. . Specifically, bis (N-((1-naphthyl) -N-phenyl) benzidine (α-NPD), 4,4 ′, 4 ″ -tris (3-methylphenylphenylamino) triphenylamine (m- MTDATA), poly (3,4 ethylenedioxythiophene) -polystyrene sulfonic acid (PEDOT-PSS), polyvinyl carbazole (PVCz) and the like.

  Further, the thickness of the hole injection layer is not particularly limited as long as the hole injection function and the hole transport function are sufficiently exhibited, but specifically, it is in the range of 0.5 nm to 500 nm. In particular, it is preferably in the range of 10 nm to 200 nm.

(3) Electron injection layer The electron transport layer may be integrated with the electron injection layer by imparting an electron transport function to the electron injection layer. That is, the electron injection layer may have only an electron injection function, or may have both an electron injection function and an electron transport function.

  The material used for the electron injection layer is not particularly limited as long as the material can stabilize the injection of electrons into the light emitting layer. In addition to the compounds exemplified as the light emitting material of the light emitting layer, Aluminum lithium alloy, lithium fluoride, sodium fluoride, strontium, magnesium oxide, magnesium fluoride, strontium fluoride, calcium fluoride, barium fluoride, aluminum oxide, strontium oxide, calcium, polymethyl methacrylate, sodium polystyrene sulfonate, Examples include lithium, cesium, cesium fluoride, alkali metals, alkali metal halides, alkali metal organic complexes, and the like. A specific example is lithium 8-quinolinolate represented by Liq.

  Alternatively, a metal doped layer in which an alkali metal or alkaline earth metal is doped on an electron transporting organic material may be formed and used as an electron injection layer. Examples of the electron-transporting organic material include bathocuproin, bathophenanthroline, and phenanthroline derivatives. Examples of the metal to be doped include Li, Cs, Ba, and Sr.

  The thickness of the electron transport layer is not particularly limited as long as the electron transport function is sufficiently exerted.

3. 2nd electrode arrangement | positioning process The 2nd electrode arrangement | positioning process in 1 embodiment of this indication has the 2nd electric power feeding part which covered the light emission area | region and protruded from the width | variety of the organic electroluminescent layer, and also does not contact a 1st electric power feeding part. In this way, the second electrode is disposed.

  Examples of the method of arranging the second electrode include a method of directly forming the second electrode at a predetermined position. Examples of the method for forming the second electrode include a vacuum deposition method, a sputtering method, an EB deposition method, a PVD method such as an ion plating method, a CVD method, and the like.

  Hereinafter, the second electrode in the second electrode arrangement step will be described.

The second electrode in the second electrode arrangement step has a second power feeding portion that covers the light emitting region and protrudes from the width of the organic EL layer, and is arranged so as not to contact the first power feeding portion. Accordingly, the second electrode arranged in the second electrode arrangement step is, for example, an organic EL layer when the shape of the first electrode 2 is an H shape as shown in FIGS. 3 through the cover the light-emitting region L ₂ of the first electrode 2, also in the width direction of the long substrate, it is preferable that the stretched so as to overlap on only viewed elongate base material. Here, the region where the second electrode overlaps only the long base material in a plan view later becomes the second power feeding unit. For this reason, the size of the region is not particularly limited as long as the region can function as the second power feeding unit.

  The second electrode in the second electrode arrangement step may or may not have optical transparency.

  The material used for the second electrode is not particularly limited as long as it is a conductive material that can be used for a general organic EL element. For example, it is preferable to use a conductive material having a small work function so that electrons can be easily injected. For example, metals such as Al, Ag, and Au, magnesium alloys such as MgAg, aluminum alloys such as AlLi, AlCa, and AlMg, Examples thereof include alloys of alkali metals and alkaline earth metals such as Li, Cs, Ba, Sr, and Ca.

  The thickness of the second electrode can be adjusted as appropriate according to the use of the organic EL element, and can be the same as the thickness of the second electrode in a general organic EL element, so the description here is omitted. To do.

  The second electrode can be fed by the second feeding unit. Further, as described later in “6. Other steps”, when one embodiment of the present disclosure includes a conductive pad arrangement step, the second electrode can be supplied with power through the conductive pad.

4). Sealing Member Arrangement Step The sealing member arrangement step according to one embodiment of the present disclosure is wider than the width of the organic EL layer and is exposed to the first power feeding unit, and is continuous in the length direction of the first electrode base material. And a step of arranging the sealing member.

  In the sealing member arranging step, the first feeding part in the non-light emitting region of the first electrode is defined by arranging the sealing member at a predetermined position, and the second feeding part of the second electrode is defined. Is done.

  In a sealing member arrangement | positioning process, as a method of arrange | positioning a sealing member, the method of bonding a sealing member using an adhesive layer etc. is mentioned, for example. Moreover, when the above-mentioned long base material and sealing member have predetermined flexibility, it becomes possible to perform bonding by a roll-to-roll method.

  The sealing member arranging step may be performed in a vacuum or under normal pressure in an inert gas atmosphere.

  Hereinafter, the sealing member arrange | positioned in a sealing member arrangement | positioning process is demonstrated.

  The sealing member arranged in the sealing member arrangement step may or may not have optical transparency.

  Moreover, the sealing member arrange | positioned in a sealing member arrangement | positioning process may have flexibility, and does not need to have it. Although it can select suitably according to the use etc. of the organic EL element in 1 embodiment of this indication, it is preferable that it has flexibility especially. This is because, when the long base material described above has a predetermined flexibility, the sealing member arranging step can be performed using a roll-to-roll method. Moreover, it is because predetermined | prescribed flexibility can be provided to the organic EL element obtained by one embodiment of this indication.

  Examples of the material used for the sealing member include inorganic materials such as quartz, thin glass, and glass, acrylic resin, cycloolefin polymer called COP, polycarbonate, polyethylene terephthalate, polybutylene terephthalate, polyphenylene sulfide, polyimide, Examples of the resin include polyamide imide, polyether sulfone, polyether imide, and polyether ether ketone.

  The thickness of the sealing member is preferably a thickness that can exhibit a sealing function as the sealing member. For example, it can be 0.001 mm or more, and can be 5 mm or less.

5. Cutting process The cutting process in one embodiment of the present disclosure includes a first electrode base material that is disposed between the plurality of first electrodes adjacent to each other in the length direction of the first electrode base material after the sealing member arranging step. This is a step of cutting in the width direction of the electrode substrate.

  The cutting process in one embodiment of the present disclosure includes, for example, a first electrode base from between a plurality of first electrodes 2 adjacent to each other in the length direction of the first electrode substrate 10 as shown in FIG. Although it is a step of cutting in the width direction of the material 10, for example, as shown in FIG. 9A described later, when a plurality of first electrodes 2 are arranged in parallel in the width direction of the long base material 1. As shown in FIG. 9B, a step of cutting in the length direction of the first electrode substrate 10 from between the plurality of first electrodes 2 adjacent in the width direction of the first electrode substrate 10 is performed. Can do.

  In the cutting step, as a method of cutting the first electrode substrate after the sealing member arranging step, specifically, the first electrode substrate, the organic EL layer, and the sealing member, for example, a blade or a laser was used. A cutting method is mentioned.

6). Other Steps In one embodiment of the present disclosure, in addition to the steps described above, other steps may be included as necessary. In one embodiment of the present disclosure, for example, as shown in FIGS. 5A to 5D, the conductive pad 6 connected to the second electrode 4 may be disposed on the long base material 1. good. The conductive pad placement step of placing the conductive pads may be a step that can be placed on the long base material and can be placed in contact with the second electrode without contacting the first electrode. . Therefore, the conductive pad placement step can be performed, for example, between the first electrode placement step and the organic EL layer formation step or between the organic EL layer formation step and the second electrode placement step. 5A to 5D are schematic process diagrams illustrating an example of a method for manufacturing an organic EL element according to an embodiment of the present disclosure.

  In one embodiment of the present disclosure, even if the entire surface of the second electrode 4 is covered with the sealing member 5 as shown in FIG. The conductive pad 6 connected to the two electrodes 4 can be used as the second power feeding unit.

  Moreover, in one embodiment of this indication, when the some 1st electrode is arranged also in the width direction with the length direction of a long base material, for example, it shows to FIG. 6 (a), (b) Thus, the 2nd electrode 4 adjacent to the width direction of the elongate base material 1 may be arrange | positioned so that it may connect with the conductive pad 6. FIG. By cutting the organic EL element 100 of FIG. 6A in the width direction of the first electrode base material 10, the conductive pad 6 can be used as the second power feeding portion of each pixel, for example, as shown in FIG. It becomes possible. 6A is a schematic plan view illustrating an example of an organic EL element according to one embodiment of the present disclosure, and FIG. 6B is a cross-sectional view taken along line AA in FIG. 6A. .

  Examples of the method for arranging the conductive pads include a method for arranging the conductive pads formed in advance and a method for forming the conductive pads directly on the long base material. In the case of directly forming a conductive pad, examples of the method for forming the conductive pad include a PVD method such as a vacuum deposition method, a sputtering method, an EB deposition method, an ion plating method, a CVD method, and the like.

  As the material of the conductive pad, for example, the same material as that used for the second electrode described above can be used. Moreover, it is preferable that the thickness of a conductive pad is a thickness which is arrange | positioned on a elongate base material and can be connected to a 2nd electrode. Specifically, since it can be appropriately adjusted according to the thickness of the first electrode and the organic EL layer disposed on the long base material, description thereof is omitted here.

B. Organic EL element The organic EL element in one embodiment of the present disclosure is a long base material that is long, and a plurality of second base materials that are arranged on the long base material and arranged in the length direction of the long base material. A first electrode base material having one electrode, and a first electrode base material on the surface of the first electrode base material on the side where the first electrode is disposed, and is continuously disposed in the length direction of the first electrode base material. An organic EL layer; a second electrode on a surface of the organic EL layer opposite to the elongated substrate; and a surface of the second electrode opposite to the elongated substrate on the first electrode. A non-light-emitting device having a first feeding portion that protrudes in the width direction of the long base material, and a sealing member disposed continuously in the length direction of the base material. The organic EL layer is wider than the light emitting region and narrower than the non-light emitting region. The second electrode has a width, and the second electrode has a second power feeding portion that covers the light emitting region and protrudes from the width of the organic EL layer. Furthermore, the device is arranged so as not to contact the first power feeding unit, and the sealing member is arranged with a width wider than the organic EL layer and exposing the first power feeding unit.

One embodiment of the present disclosure will be described with reference to the drawings. FIG. 8A is a schematic plan view illustrating an example of an organic EL element according to one embodiment of the present disclosure, and FIG. 8B is a cross-sectional view taken along line BB in FIG. The organic EL element 100 according to an embodiment of the present disclosure is a long base 1 that is long, and a plurality of first substrates that are arranged on the long base 1 and arranged in the length direction of the long base 1. The first electrode base material 10 having the electrode 2 and the first electrode base material 10 on the surface on which the first electrode 2 is arranged are continuously arranged in the length direction of the first electrode base material 10. The organic EL layer 3, the second electrode 4 on the surface of the organic EL layer 3 opposite to the long substrate 1, and the surface of the second electrode 4 opposite to the long substrate 1, And a sealing member 5 arranged continuously in the length direction of the first electrode substrate 10.
In one embodiment of the present disclosure, the first electrode 2 includes a non-light emitting region having a first power feeding portion protruding in the width direction of the long base material 1 and a light emitting region narrower than the non-light emitting region. The organic EL layer 3 has a width wider than the light emitting region and narrower than the width of the non-light emitting region, and is arranged so that the first power feeding portion of the non light emitting region is exposed, and the second electrode 4 covers the light emitting region. And the second feeding part protruding from the width of the organic EL layer 3 is arranged so as not to contact the first feeding part, and the sealing member 5 is wider than the width of the organic EL layer 3 and 1 It arrange | positions with the width | variety which an electric power feeding part exposes.

  Moreover, as shown in FIG. 9A, for example, the organic EL element according to one embodiment of the present disclosure includes a plurality of first electrodes 2 arranged in the width direction as well as the length direction of the long base material 1. You may do it. In this case, as shown in FIG. 9B, the organic EL element 100 having a single pixel can be obtained by cutting in the length direction and the width direction of the first electrode substrate 10.

  Furthermore, the organic EL device according to one embodiment of the present disclosure is provided on the adjacent first electrode 2 arranged in the width direction of the long base 1 as shown in FIGS. 6 (a) and 6 (b). The conductive pad 6 may be disposed so as to be connected to the second electrode 4.

  In one embodiment of the present disclosure, the thickness of the organic EL layer can be made uniform, and the wiping process of the organic EL layer for providing the first feeding portion on the first electrode is not required, so that the manufacturing efficiency is improved. There is an effect that can be achieved. In addition, since it can be the same as that of the content described in the above-mentioned "A. Manufacturing method of an organic EL element" about a specific effect, description here is abbreviate | omitted.

  The organic EL element according to one embodiment of the present disclosure includes at least a long base material, a first electrode, an organic EL layer, a second electrode, and a sealing member, and a conductive pad or the like can be used as another configuration. . In addition, about each structure mentioned above which an organic EL element has, and another structure, since it can be made to be the same as the content regarding each structure described in the above-mentioned "A. manufacturing method of an organic EL element", it is here. Description is omitted.

A long base material (material: PEN film, thickness: 100 μm) having a long length with a SiO ₂ film (thickness: 100 nm) formed on one surface was prepared.
Next, ITO was vapor-deposited on the surface of the long base material opposite to the side on which the SiO ₂ film was formed to form a first electrode layer having a thickness of 150 nm. Next, a resist having a thickness of 2 μm (etching resist OFPR800 manufactured by Tokyo Ohka Kogyo Co., Ltd.) is formed on the surface of the long base material on which the first electrode layer is formed by using a die coating method. Heat treatment was performed under conditions for 3 minutes. Next, the obtained resist was exposed and developed. Subsequently, using an etching solution (ITO-07N: manufactured by Kanto Chemical Co., Inc.) capable of etching ITO on the long base material on which ITO and a resist are formed as described above, a temperature of 40 ° C. Etching was performed for 5 minutes underneath. Thereafter, by removing the resist by washing, for example, the first electrode 2 as shown in FIG. 5A was formed. In the case where the conductive pad 6 is formed as shown in FIG. 5A and the conductive pad is formed of the same material as the first electrode 2, the first electrode 2 is formed at the same time. A conductive pad 6 can be formed.

  Next, a composition for forming a hole injection layer (material: PEDOT / PSS Bytron P AI4083 Bayer) for forming a hole injection layer on the obtained first electrode is shown in FIG. As shown, a coating film was formed by using a die coating method to form a hole injection layer forming composition having a thickness of 80 nm. Then, after pre-baking the coating film composed of the composition for forming the hole injection layer under the condition of a temperature of 110 ° C. in the air, the film is baked for 10 minutes under the condition of a temperature of 120 ° C. A hole injection layer was formed.

  Next, on the obtained hole injection layer, a composition for forming a light emitting layer exhibiting a green color (material: F8BT (Poly [(9,9-di-n-octylfluorenyl-2,7-diyl) -alt- ( benzo [2,1,3] thiadiazol-4,8-diyl)]), manufactured by American Dye Source, Inc., as shown in FIG. The coating film comprised from the composition for light emitting layer formation of 80 nm was obtained. Then, the light emitting layer was formed by baking the coating film comprised from the composition for light emitting layer formation on the conditions of the temperature of 150 degreeC for 30 minutes.

  Subsequently, lithium fluoride (thickness: 1 nm) and aluminum (thickness: 100 nm) were laminated in this order on the obtained light-emitting layer using a vacuum deposition method, and the first layer as shown in FIG. Two electrodes were formed.

Thereafter, as a gas barrier layer, SiO ₂ , SiON, and SiN are vapor-deposited using a CVD method to form a laminated film, and then a film substrate (material: PEN film, on which an SiO ₂ film (thickness: 100 nm) is formed) (Thickness: 100 μm) was bonded using a thermosetting resin as shown in FIG. 5D to obtain an organic EL element of the present disclosure.

  In the present disclosure, it is possible to provide a method for manufacturing an organic EL element capable of improving the manufacturing efficiency without requiring the wiping process of the organic EL layer for providing the first power feeding portion on the first electrode. .

DESCRIPTION OF SYMBOLS 1 ... Long base material 2 ... 1st electrode 3 ... Organic electroluminescent layer 4 ... 2nd electrode 5 ... Sealing member 10 ... 1st electrode base material 100 ... Organic electroluminescent element

Claims (3)

It has a long base material which is long, and a plurality of first electrodes arranged in the length direction of the long base material, and the first electrode protrudes in the width direction of the long base material. A first electrode base material preparation step for preparing a first electrode base material, which includes a non-light emitting area having a first power feeding portion and a light emitting area narrower than the non-light emitting area;
Organically continuously in the length direction of the first electrode base so that the width of the light emitting region is wider and narrower than the width of the non-light emitting region, and the first power feeding part of the non-light emitting region is exposed. An organic electroluminescent layer forming step of applying an electroluminescent layer forming composition and forming an organic electroluminescent layer;
A second electrode disposing step of covering the light emitting region and having a second feeding part protruding from the width of the organic electroluminescence layer, and further arranging a second electrode so as not to contact the first feeding part;
A sealing member disposing step of disposing a sealing member continuously in the length direction of the first electrode base material with a width wider than the organic electroluminescence layer and exposing the first power feeding unit;
The manufacturing method of the organic electroluminescent element which has this.   After the sealing member arranging step, the first electrode base material is cut in the width direction of the first electrode base material from between the plurality of first electrodes adjacent to each other in the length direction of the first electrode base material. The manufacturing method of the organic electroluminescent element of Claim 1 which has the cutting process to perform. A first electrode base material having a long base material that is long, and a plurality of first electrodes arranged on the long base material and arranged in a length direction of the long base material;
On the surface of the first electrode substrate on which the first electrode is disposed, an organic electroluminescence layer disposed continuously in the length direction of the first electrode substrate;
A second electrode on the surface of the organic electroluminescence layer opposite to the elongated substrate;
On the surface of the second electrode opposite to the long base material, a sealing member disposed continuously in the length direction of the first electrode base material;
An organic electroluminescence device having
The first electrode includes a non-light emitting region having a first power feeding portion protruding in a width direction of the long base material, and a light emitting region narrower than the non-light emitting region,
The organic electroluminescence layer is wider than the light emitting region and narrower than the non-light emitting region, and is disposed so that the first power feeding portion of the non-light emitting region is exposed.
The second electrode has a second power feeding part that covers the light emitting region and protrudes from the width of the organic electroluminescence layer, and is arranged so as not to contact the first power feeding part,
The said sealing member is an organic electroluminescent element arrange | positioned with the width | variety wider than the width | variety of the said organic electroluminescent layer, and the said 1st electric power feeding part exposed.