JP2007141514A - Improvement of substrate of organic electroluminescent element - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent blurring of color at the time of full-color display with an organic EL element as a self-light-emitting light source. <P>SOLUTION: The organic EL element 100 is provided with a substrate 10, an organic EL layer 20 arranged at an upper face 10U side of the substrate 10, and red-, green-, and blue-color filters 22R, 22G, 22B arranged at an underside 10D of the substrate 10. The substrate 10 is formed by arraying a plurality of transparent members 11 extended in a thickness direction and bonding them with a bonding part 12. Each transparent member 11 takes on a spherical shape with both end parts cut off. Therefore, its side face consists of a light-reflecting curved surface swelling outside against a plane parallel with a thickness direction of the substrate. Light from the organic layer 20 is reflected at an interface between the side face and the bonding part 12, and irradiated outside. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an organic electroluminescence element (hereinafter referred to as an organic EL element) used in, for example, a display device, and more particularly to improvement of a substrate shape.

  The organic EL device has excellent characteristics such as high-speed response, a wide viewing angle, and a small volume occupied by the device, as compared with other solid-state light emitting devices. Therefore, in recent years, it is being applied to various uses such as a full-color display device such as a display and a lighting device.

  When an organic EL element is used in a full color display device such as a display, white light emitted from the organic EL element is converted into blue, red, and green light by blue, red, and green filters. Display is realized. In this apparatus, organic EL elements that can emit light independently in pixel units, and blue, red, and green color filters are provided corresponding to the respective pixels. Then, white light emitted from each pixel is transmitted through each color filter, so that light of blue, red, and green color is emitted for each pixel.

  In this organic EL element, for example, an organic light emitting layer is provided between a pair of electrodes on one surface of a transparent substrate, and a color filter is provided on the other surface of the transparent substrate. And the light radiate | emitted from the organic light emitting layer injects into a blue, red, and green filter through a transparent substrate, and is converted into blue, red, and green light.

  Here, the light emitted from the organic light emitting layer is diffused light, and the transparent substrate is relatively thick. Therefore, when the light emitted from each organic light emitting layer reaches the filter, its irradiation range is expanded to some extent. have. On the other hand, generally, the separation distance between each pixel is narrow, and the separation distance between each filter is also narrow. Therefore, if the irradiation range of white light emitted from one pixel is wide, the white light is transmitted to the pixel. The light is incident not only on the corresponding filter but also on other filters. As described above, when light emitted from one pixel is incident not only on a desired filter but also on a different filter, unnecessary color conversion is performed, which causes a so-called color blur.

Conventionally, for example, as described in Patent Documents 1 and 2, it is known that a transparent substrate of an organic EL element is made of an optical fiber bundle. Further, as described in Patent Document 2, it is known that a substrate in which a large number of minute cylindrical light guide members are bundled is used as a substrate of an organic EL element. In these substrates, when the light emitted from the organic light emitting layer passes through the substrate, the traveling direction of the light is regulated by the fiber bundle or the cylindrical light guide member. Accordingly, the light emitted from each pixel is incident on the color filter corresponding to the pixel without being diffused, so that the occurrence of color blur can be prevented.
JP-A-8-78158 Japanese Patent Laid-Open No. 9-326297

  However, when the transparent substrate of the organic EL element is composed of an optical fiber bundle or a cylindrical light guide member as described above, the light emission direction is limited to the thickness direction, and thus the emission angle is reduced and the viewing angle is reduced. There is a problem that becomes narrow.

  Accordingly, the present invention has been made in view of the above problems, and an object thereof is to provide a transparent substrate of an organic EL element capable of widening a viewing angle while preventing occurrence of color blur.

  An organic electroluminescence device according to the present invention is an organic electroluminescence device in which an organic EL layer is disposed on one surface of a substrate, and light from the organic EL layer is emitted to the outside through the substrate. The substrate has a plurality of optical paths that transmit light in the thickness direction. Each optical path consists of a light-reflective curved surface whose outer peripheral surface swells outward with respect to a surface parallel to the thickness direction of the substrate, and transmits at least part of the light while being reflected by the inner peripheral surface. It is characterized by.

  The optical path is made of, for example, a transparent member, and preferably a plurality of transparent members are arranged, and these transparent members are bonded together via an adhesive portion. When the bonding portion forms the inner peripheral surface of the optical path, the bonding portion includes, for example, reflective powder and a light absorbing material. As a result, the light incident on the optical path propagates in the optical path while reflecting each bonded portion. The optical path has, for example, a shape in which both ends of the sphere are cut.

  A metal coating layer may be provided on the outer peripheral surface of the transparent member, and the inner peripheral surface of the optical path may be formed of the metal coating layer. In this case, the light incident on each optical path propagates in the optical path while being reflected by the metal coating layer. The optical path may be a hollow portion formed in the metal body, and the inner peripheral surface of the metal body may form the inner peripheral surface of the optical path. The hollow member is filled with a transparent member, for example. The transparent member is made of, for example, glass or transparent resin.

  The organic electroluminescent element substrate according to the present invention is an organic electroluminescent element substrate for disposing an organic EL layer on one surface and transmitting and emitting light from the organic EL layer, The optical path has a plurality of optical paths that transmit light in the thickness direction, and each optical path is composed of a light-reflective curved surface that swells outward with respect to a plane parallel to the thickness direction of the substrate. It is characterized in that a part is transmitted while being reflected by the inner peripheral surface.

  An organic electroluminescent element substrate manufacturing method according to the present invention is an organic electroluminescent element substrate for disposing an organic EL layer on one surface and transmitting and emitting light from the organic EL layer. It is a manufacturing method. In this manufacturing method, a transparent member made of a transparent body, or a hollow member having a hollow portion formed therein, is arranged next to each other, with the outer peripheral surface coated with an adhesive layer to which at least a light absorbing material is added. The step of integrally forming a plurality of transparent members or hollow members by bonding the steps and the adhesive layers together, and the transparent members or hollow members integrally formed together with the adhesive layers together with each transparent member or each Cutting the hollow member so as to be traversed, and obtaining a substrate having a plate shape. The transparent member or the hollow member having a hollow portion formed therein may be, for example, a sphere, a flat sphere formed by rotating an elliptical surface, or the like, or may have a cylindrical shape or the like.

  According to the present invention, the path of light incident on each optical path from one surface of the substrate is regulated by each optical path and travels substantially parallel to the thickness direction inside the substrate, so that light does not diffuse within the substrate. . Therefore, for example, in a full-color display device, light emitted from each pixel of the organic EL element can be appropriately incident on a filter corresponding to the pixel, so that occurrence of color blur or the like can be prevented. In addition, since the inner peripheral surface of each optical path consists of a light-reflecting curved surface that swells outward with respect to a plane parallel to the thickness direction of the substrate, the light incident on each optical path has a large exit angle and exits from the optical path. Is done. Therefore, for example, in a self-luminous display, the viewing angle can be increased. Furthermore, according to the manufacturing method of the present invention, a substrate having a plurality of optical paths can be easily manufactured.

  The present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic cross-sectional view of an organic EL element according to the first embodiment of the present invention. In the present embodiment, a case where an organic EL element is used as a self-light-emitting light source of a display device will be described.

  The organic EL element 100 according to the first embodiment includes a substrate 10, an organic EL layer 20 disposed on the upper surface 10U side of the substrate 10, and red, green, and blue filters 22R disposed on the lower surface 10D side of the substrate 10. , 22G, 22B. As will be described later, the substrate 10 is formed by arranging a plurality of transparent members 11 and adhering them by an adhesive portion 12. The transparent member 11 is formed from glass, synthetic resin, or the like.

  Since the upper surface 10U is roughened by the plurality of transparent members 11, a resin layer 15 for smoothing the upper surface 10U is provided on the upper surface 10U of the substrate 10. The resin layer 15 is colorless and transparent, and for example, a reactive curable silicone resin, an epoxy resin, an acrylic resin, or the like is used as a material thereof.

  A first electrode 16 (for example, an anode) is laminated on the upper surface of the resin layer 15, an organic EL layer 20 is laminated on the upper surface of the first electrode 16, and a second electrode 17 ( For example, a cathode) is laminated. A plurality of first electrodes 16 are provided and extend in parallel with each other, and a plurality of second electrodes 17 are also provided, and extend in parallel with each other and perpendicular to the direction in which the first electrode 16 extends. With such a configuration, the organic EL layer 20 that is laminated between the positions where the first electrode 16 and the second electrode 17 intersect each other constitutes a pixel (one pixel).

  Each filter 22R, 22G, and 22B is provided corresponding to each pixel of the organic EL layer, and the red, green, and blue filters 22R, 22G, and 22B are arranged in stripes. A black matrix 22BR is provided between the red, green, and blue filters 22R, 22G, and 22B in order to prevent stray light from entering each filter.

  The layer structure of the organic EL layer 20 is not limited. For example, a hole transport layer, an organic light emitting layer, and an electron transport layer are stacked in this order from the anode side. The first electrode 16 is made of a conductive and transparent material, and is made of, for example, ITO (Indium Tin Oxide), ATO (antimony doped tindioxide), or ZnO (zinc oxide). The second electrode 17 is formed using, for example, aluminum.

  When current is input from the first and second electrodes 16 and 17, each pixel of the organic EL layer 20 emits white light having a luminance corresponding to the input current. The white light emitted from each pixel passes through the resin layer 15 and the substrate 10 and then is input to the filters 22R, 22G, and 22B corresponding to the respective pixels. The white light input to the filters 22R, 22G, and 22B is extracted to the outside as red, blue, and green of the corresponding filters, and forms an image.

  2 is an enlarged view of the substrate 10, and FIG. 3 is a cross-sectional view taken along the line III-III in FIG. Each transparent member 11 has a shape in which both ends of a sphere are cut, and both cut surfaces 11a and 11b form an upper surface 10U and a lower surface 10D (see FIG. 1) of the substrate 10, respectively. Each transparent member 11 serves as an optical path for transmitting light from the organic EL layer 20 from the upper surface 10U to the lower surface 10D. One cut surface 11a serves as an incident end for allowing light to enter, and the other cut surface 11b enters the light path. It becomes an emitting end for emitting the light.

  The side surface 11 c of each transparent member 11 is bonded to the side surface 11 c of another transparent member 11 via the bonding portion 12. The bonding portion 12 is mainly formed of transparent glass or transparent resin, and is formed by adding a reflective material (for example, reflective powder) and a light absorbing material. Since the adhesive portion 12 includes the reflective material and the light absorbing material as described above, the adhesive portion 12 absorbs a part of the incident light and reflects the other light, and thus is formed as a non-transmissive reflective material.

  The reflective powder is a powder of a reflective metal. As the reflective metal, for example, aluminum, silver, nickel, or a mixture thereof is used, and aluminum is preferably used. The reflective powder is, for example, 10 to 800 parts by weight, preferably 50 to 200 parts by weight, based on 100 parts by weight of the main component (transparent glass or transparent resin). In addition, as the light absorbing material, for example, carbon particles are used. The light absorbing material is, for example, 10 to 800 parts by weight, preferably 50 to 200 parts when the main component (transparent glass or transparent resin) is 100 parts by weight. Part by weight is blended. Although the reflective material and the light absorbing material may be uniformly added to the bonding portion 12, it is desirable that the reflective material is disposed more in the vicinity of the transparent member 11. Therefore, the bonding portion 12 may be blended in a non-uniform manner with a reflective material and a light absorbing material.

  The diameters of both the cut surfaces 11a and 11b are smaller than the width of the first and second electrodes 16 and 17 (that is, the width of one pixel), and further the black matrix 22BR (that is, the interval formed between the filters). It is preferably smaller than the width, and more preferably ½ or less of the width of the electrodes 16 and 17. If the diameters of both cut surfaces 11a and 11b are narrower than the distance formed between the filters, the transparent member 11 does not straddle two pixels, so that only light emitted from one pixel is always incident on the transparent member 11. . Therefore, the light emitted from the two pixels is not mixed inside one transparent member 11. The diameter of both the cut surfaces 11a and 11b is, for example, about 1 μm to 1 mm. The thickness of the substrate is, for example, in the range of about 50 μm to 5 mm.

  As shown in FIG. 3, the transparent members 11 are arranged on the left and right in the drawing so as to be adjacent to each other in a straight line. And each transparent member 11 is arrange | positioned between the transparent members 11 adjacent to right and left on the upper and lower sides in the figure.

  Hereinafter, the operation of the substrate 10 according to the first embodiment will be described with reference to FIG. 2 again. The light emitted from the organic EL layer 20 passes through the first electrode 16 and the resin layer 15, and then enters each transparent member 11 from each cut surface 11 a (incident end) on the upper surface 10 U of the substrate 10. Here, since each transparent member 11 has transparency, it serves as an optical path for incident light, and an adhesive portion 12 that bonds the transparent members 11 together forms an inner peripheral surface of each optical path.

  Of the light incident from each incident end, the light beam L1 substantially parallel to the thickness direction of the substrate 10 is transmitted through the transparent member 11 without being reflected by the bonding portion 12 (that is, the inner peripheral surface of the optical path). Then, the light is emitted directly from the cut surface 11b (exit end) of the transparent member 11. On the other hand, of the light incident on each transparent member 11, for the light L2 that is inclined at a certain angle with respect to the thickness direction, the adhesive portion 12 is a reflecting material, and therefore the adhesive portion 12 (that is, the optical path) The light is reflected by the inner peripheral surface and propagates to the other end (outgoing end). Here, since the inner peripheral surface of each optical path is formed from a spherical surface, it is formed to bulge outward with respect to a surface parallel to the thickness direction. Therefore, the light L2 is reflected from the inner peripheral surface of the optical path, and is emitted from the cut surface (exit end) 11b at an angle larger than the angle when entering the optical path.

  As described above, in the present embodiment, white light incident on the upper surface 10U of the substrate 10 from each pixel of the organic EL layer 20 is propagated to the lower surface of the substrate 10 via each optical path. Therefore, the light emitted from each pixel of the organic EL layer 20 surely enters each filter provided corresponding to each pixel, and does not enter the filters corresponding to other pixels. Thereby, in this embodiment, the occurrence of color blur is prevented and the image quality can be improved. In addition, as described above, the substrate 10 can increase the emission angle with respect to the incident angle of a part of the light. Therefore, when the substrate 10 according to the present embodiment is used, the viewing angle is large. A self-luminous display can be provided.

  Next, the manufacturing method of the board | substrate 10 of this embodiment is demonstrated using FIG. In addition, in the following description, although the case where an adhesion part is comprised with a thermosetting resin is demonstrated, glass and other types of resin (For example, photocurable resin, two-component reaction curable resin (namely, Even when two components are mixed and the two components undergo a curing reaction and cured))) or the like is used, it is manufactured after the mode is appropriately changed. Of course, a sphere made of resin may be used instead of the glass sphere 11 '.

  As shown in FIG. 4, in this embodiment, a plurality of spherical glass spheres 11 ′ are prepared, and first, reflective powder and a light absorbing material are added to the outer peripheral surface of the spherical glass sphere 11 ′. A thermosetting resin liquid is applied, and an adhesive layer 12 ′ is coated on the outer peripheral surface of the glass sphere 11 ′. Next, a base 121 having a flat upper surface is prepared, and a plurality of spherical glass balls 11 ′ coated with the adhesive layer 12 ′ are arranged adjacent to each other on the upper surface of the base 121. Next, by heating these glass spheres 11 ′, the adhesive layer 12 ′ is cured, the adhesive layers 12 ′ of the adjacent glass balls 11 ′ are bonded together, and the adjacent glass balls 11 ′ are bonded together. Intermediate 13 ′ is obtained.

  The upper and lower ends of the intermediate body 13 ′ are cut transversely, the upper and lower ends of the glass bulb 11 ′ and a part of the adhesive layer 12 ′ are cut, and as shown in FIG. The board | substrate 10 which exhibits the plate shape which the cut surfaces 11a and 11b of glass sphere 11 'exposed to lower surface 10D is obtained. Each glass sphere 11 ′ has a sphere diameter set to about 50 μm to 1 mm, and an average layer thickness of each adhesive layer 12 ′ is set to 3 μm to 0.5 mm. Therefore, the thickness of the substrate is about 40 μm to 1 mm.

  The organic EL element according to the second embodiment will be described with reference to FIG. The second embodiment is different from the first embodiment in that a metal coating layer 21 is formed on the side surface 11 c of the transparent member 11 and the inner peripheral surface of the optical path is made of the metal coating layer 21. Hereinafter, the difference will be mainly described.

  Each transparent member 11 has a shape in which both ends of the sphere are cut, and a metal coating layer 21 is coated on the side surface 11 c of the transparent member 11. The transparent members 11 coated with the metal coating layer 21 are bonded to each other via the bonding portion 12 as in the first embodiment.

  Also in the present embodiment, since the inner peripheral surface of the optical path (that is, the inner peripheral surface of the coating layer 21) is formed from a spherical surface, it is a curved surface formed to bulge outward with respect to a surface parallel to the thickness direction. is there. Therefore, the light incident on the optical path is reflected from the inner peripheral surface of the optical path, and is emitted from the cut surface (exit end) 11b at an angle larger than the angle when entering the optical path. Further, in the present embodiment, by providing the metal coating layer 21, it is possible to improve the light reflection efficiency on the inner peripheral surface 11c of the optical path as compared with the first embodiment.

  In addition, the outer peripheral surface 11c of each transparent member 11 is formed as a polishing surface. This is because the light incident on the transparent member 11 is less likely to be reflected by the metal coating layer 21 if the surface is a non-polished surface. The metal coating layer 21 is made of a metal such as silver, nickel, or a mixture thereof.

  Moreover, in this embodiment, the adhesion part 12 has the same composition as 1st Embodiment except a reflective metal being not added. The reason why the reflective metal is not added to the bonding portion 12 is that the metal coating layer 21 is provided so that the bonding portion 12 does not need to reflect the light incident on the transparent member 11.

  Next, the manufacturing method of the board | substrate 10 in this embodiment is demonstrated. In the present embodiment, first, a plurality of glass balls (not shown) are prepared, and the outer peripheral surface thereof is polished. Next, a metal such as aluminum is coated on the entire outer peripheral surface of the glass sphere, for example, by vapor deposition to form a metal coating layer. Next, the thermosetting resin liquid to which the reflective powder is added is applied to the entire outer peripheral surface of the metal coating layer, and the adhesive layer is coated on the outside of the metal coating layer. Since the subsequent steps are the same as those in the first embodiment, the description thereof is omitted.

  Next, a third embodiment will be described with reference to FIG. The third embodiment is different from the first embodiment in that a metal member 31 is used instead of the glass member used for the substrate 10. Hereinafter, the third embodiment will be described focusing on the differences.

  In the third embodiment, the substrate 10 is formed by arranging a plurality of metal members 31 and bonding them with the bonding portion 12. Similarly to the transparent member 11 (see FIG. 2), the metal member 31 has a shape in which both ends of the sphere are cut. As shown in FIG. 6, the metal member 31 has a hollow inside, and an inner peripheral surface 31 c is formed as a mirror surface. The metal member 31 is made of a metal such as aluminum, stainless steel, silver, nickel, or an alloy thereof.

  In the present embodiment, the hollow portion of the metal member 31 serves as an optical path, that is, the light emitted from the organic EL layer 20 passes through the hollow portion and is emitted to the outside from the emission end 11b. Here, since the inner peripheral surface 31c of the metal member 31 (that is, the inner peripheral surface of the optical path) is a spherical surface, the inner peripheral surface of the optical path is also outside the plane parallel to the thickness direction in this embodiment. It is a curved surface formed by swelling. Therefore, the light incident on the optical path is reflected from the inner peripheral surface 31c, and is emitted from the emission end 11b at an angle larger than the angle when entering the optical path.

  The base material 10 according to the present embodiment is manufactured, for example, by the same method as in the first embodiment. That is, for example, after a plurality of spheres (hollow members) having a hollow portion inside are bonded via an adhesive layer, the hollow member is cut together with the adhesive layer so that both ends of the hollow member are traversed, A substrate is manufactured. Of course, both ends of the hollow member may be cut before the metal member is bonded by the adhesive layer.

  Next, a fourth embodiment will be described with reference to FIG. In the fourth embodiment, as in the third embodiment, the substrate 10 is formed by a metal member 31 having a hollow portion. The hollow portion of the metal member 31 is a transparent member 42 such as glass or plastic. Filled by. Other configurations are the same as those of the third embodiment. Note that the substrate 10 according to the fourth embodiment is manufactured by filling the transparent member 42 after the substrate of the third embodiment is formed, for example.

  Next, a fifth embodiment will be described with reference to FIG. In the first embodiment, the transparent member 11 has a shape in which both ends of a sphere are cut, but in the fifth embodiment, the transparent member 11 is a flat shape formed by rotating an elliptical surface. It has a shape in which both ends of the sphere are cut.

  Also in the present embodiment, the side surface 11c of the transparent member 11 (that is, the inner peripheral surface of the optical path) is a curved surface formed to bulge outward with respect to a surface parallel to the thickness direction. Therefore, the light L2 reflected by the inner peripheral surface of the optical path exits from the cut surface (exit end) 11b at an angle larger than the angle when entering the optical path, as in the first embodiment. That is, also in the present embodiment, the viewing angle can be increased as in the first embodiment.

  Of course, when the substrate 10 is formed of the metal member 31 as in the third and fourth embodiments, the metal member 31 may be formed of a flat sphere having a hollow portion. Note that the shapes of the metal member and the glass member are not limited to flat spheres and spheres as long as the inner circumferential surface of the optical path is formed of a curved surface that swells outward with respect to a plane parallel to the thickness direction.

1 is a schematic longitudinal sectional view of an organic EL element according to a first embodiment of the present invention. It is an enlarged view of the longitudinal cross-sectional view of the board | substrate which concerns on the 1st Embodiment of this invention. It is a cross-sectional view on the III-III line in FIG. It is a longitudinal cross-sectional view for demonstrating the manufacturing method of the board | substrate concerning 1st Embodiment. It is a typical longitudinal cross-sectional view of the organic EL element which concerns on 2nd Embodiment. It is a typical longitudinal cross-sectional view of the organic EL element which concerns on 3rd Embodiment. It is a typical longitudinal cross-sectional view of the organic EL element which concerns on 4th Embodiment. It is an enlarged view of a schematic longitudinal sectional view of an organic EL element according to a fifth embodiment.

Explanation of symbols

10 Substrate 11 Transparent member (optical path)
11 'Glass sphere 12 Adhesion part 12' Adhesion layer 20 Organic EL layer 22R, 22G, 22B Filter 31 Metal member 100 Organic EL element

Claims (12)

  An organic electroluminescence element in which an organic EL layer is disposed on one surface of a substrate and emits light from the organic EL layer to the outside through the substrate, wherein the substrate emits light in a thickness direction Each of the optical paths has a light-reflecting curved surface that swells outward with respect to a plane parallel to the thickness direction of the substrate, and each of the optical paths transmits at least a part of the light. An organic electroluminescence device that transmits light while being reflected by the inner peripheral surface.   The organic electroluminescent element according to claim 1, wherein the optical path is made of a transparent member.   The organic electroluminescence element according to claim 2, wherein the substrate is formed by arranging a plurality of the transparent members and bonding the transparent members via an adhesive portion.   The organic electroluminescence device according to claim 3, wherein the bonding portion forms an inner peripheral surface of the optical path, and the bonding portion includes a reflective powder and a light absorbing material.   The organic electroluminescence device according to claim 2, wherein a metal coating layer is provided on an outer peripheral surface of the transparent member, and an inner peripheral surface of the optical path is made of the metal coating layer.   2. The organic electroluminescent element according to claim 1, wherein the optical path has a shape in which both ends of a sphere are cut.   The organic electroluminescent element according to claim 1, wherein the optical path is a hollow portion formed in a metal body.   The organic electroluminescent element according to claim 7, wherein the hollow portion is filled with a transparent member.   The organic electroluminescent element according to claim 2, wherein the transparent member is made of glass or transparent resin.   The color filter including a plurality of filters is disposed on the opposite side of the organic EL layer with the substrate interposed therebetween, and the color filter includes a black matrix between the adjacent filters. Organic electroluminescence element.   An organic electroluminescent element substrate for arranging an organic EL layer on one surface and transmitting and emitting light from the organic EL layer, wherein a plurality of optical paths for transmitting light in a thickness direction are provided. Each of the optical paths has an inner peripheral surface formed of a light-reflecting curved surface that swells outward with respect to a surface parallel to the thickness direction of the substrate, and at least a part of the light is caused by the inner peripheral surface. A substrate for an organic electroluminescence element that is transmitted while being reflected. A method for producing a substrate for an organic electroluminescence element for disposing an organic EL layer on one surface and transmitting and emitting light from the organic EL layer,
Arranging a transparent member made of a transparent body, or a hollow member having a hollow portion formed therein, adjacent to each other, with an outer peripheral surface coated with an adhesive layer to which at least a light absorbing material is added;
A step of integrally molding the plurality of transparent members or hollow members by bonding the adhesive layers;
Cutting the plurality of integrally formed transparent members or hollow members together with the adhesive layer so that the transparent members or the hollow members are traversed to obtain a substrate having a plate shape. A method for manufacturing a substrate for a luminescence element.

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