JP2005259573A - Organic el panel and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a durable inexpensive organic EL element which prevents moisture or gas discharged from a color filter from penetrating, and also to provide its manufacturing method. <P>SOLUTION: The organic EL panel comprises a substrate, a color changing layer, a barrier layer containing ITO, a first electrode containing ITO, an organic layer containing a light emitting layer, and a second electrode accumulated in order on the substrate. The barrier layer and the first electrode are formed by a spattering method using the same ITO deposition apparatus. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  In the present invention, an organic EL (electroluminescence) element formed by sandwiching an organic layer including at least a light emitting layer by a pair of translucent electrodes, at least one of which is disposed on a substrate, and sealing the organic EL element The present invention relates to an organic EL panel formed by bonding a member to the substrate and a manufacturing method thereof.

  An organic EL panel as a display using an organic EL element is a self-luminous element and does not require backlighting. Therefore, it can be thinned, has a wide viewing angle, and is suitable for a large display panel. Is being promoted.

  For organic EL panels displaying in full color, a CCM (color changing media) method or a color filter method is used as a color conversion method. The CCM layer (hereinafter referred to as CCM) and the color filter are generally color conversion layers. The CCM system uses a blue light emitting organic EL element, and a CCM made of a phosphor that converts blue light to green, blue light to red, and color conversion is provided on the organic EL panel. In the color filter method, a white light emitting organic EL element is used, and a color filter composed of three primary colors of red, green, and blue is provided on an organic EL panel. When a CCM or color filter which is a color conversion layer is formed on a substrate, a step is generated for each color pattern. Therefore, a flattening layer made of an organic material for flattening is provided on the color conversion layer.

  When the organic EL panel is driven, the color conversion layer and the flattening layer made of an organic material release moisture and outgas by heat generated by the driving. This moisture or outgas damages the organic EL element, causes dark spots that are non-light emitting portions, and shortens the life of the organic EL element.

Therefore, as disclosed in Patent Document 1, the color conversion layer is covered with a barrier layer using silicon oxide to protect the organic EL element from moisture and outgas generated from an organic substance.
JP-A-11-260562

  However, since the organic EL panel for full color display has a multi-layer structure, there is a problem that a forming material and a manufacturing facility are required for each layer, and manufacturing cost increases.

  In view of such problems, the present invention has a barrier layer containing ITO (indium tin oxide) in an organic EL panel using a color conversion layer and a method for manufacturing the organic EL panel, and is an inexpensive and long-life organic material. An object is to provide an EL panel and a method for manufacturing an organic EL panel.

  In order to solve the above problems, the present invention provides a substrate, a color conversion layer, a barrier layer containing ITO, a first electrode containing ITO, an organic layer containing a light emitting layer, and a second electrode. And.

  According to the present invention, the color conversion layer, the barrier layer, the first electrode, the organic layer, and the second electrode are formed on the substrate as described in claim 2. Are sequentially stacked.

  According to a third aspect of the present invention, there is provided a support substrate in which a color conversion layer and a barrier layer are sequentially stacked, and a first electrode, an organic layer, and a second electrode are sequentially stacked. The substrate and the support substrate are disposed so that the barrier layer and the second electrode face each other.

  According to a fourth aspect of the present invention, a planarization layer is provided between the color conversion layer and the barrier layer.

  Moreover, this invention is equipped with the insulating layer which insulates the said barrier layer and said 1st electrode between the said barrier layer and said 1st electrode, as described in Claim 5.

  In the present invention, the barrier layer is provided by a sputtering method.

  According to a seventh aspect of the present invention, there is provided an organic apparatus comprising: a substrate; a color conversion layer; a barrier layer; a first electrode; an organic layer including a light emitting layer; and a second electrode. A method for manufacturing an EL panel, comprising: forming a barrier layer containing ITO on a color conversion layer formed on a substrate using an ITO film forming apparatus; and forming the ITO film on the barrier layer Forming a first electrode containing ITO using an apparatus.

  According to the present invention, as described in claim 8, on the substrate, the color conversion layer, the barrier layer, the first electrode, the organic layer, the second electrode, The organic EL panel manufacturing method according to claim 7, wherein the layers are sequentially stacked.

  According to the present invention, the color conversion layer and the barrier layer covering the color conversion layer are sequentially stacked on the substrate, and the first substrate is formed on the support substrate. An electrode, the organic layer, and the second electrode are formed, and the substrate and the support substrate are disposed via an adhesive so that the barrier layer and the second electrode face each other.

  According to a tenth aspect of the present invention, the method includes a planarization layer forming step of forming a planarization layer between the color conversion layer and the barrier layer.

  According to the present invention, an insulating layer that insulates the barrier layer from the first electrode is formed between the barrier layer forming step and the first electrode forming step. Including an insulating layer forming step.

   In the present invention, as described in claim 12, the ITO film forming apparatus is a sputtering apparatus.

  The present invention relates to an organic EL panel including a color conversion layer, and suppresses intrusion of moisture and outgas generated from an organic substance contained in the color conversion layer into an organic EL element, and has high durability and is inexpensive. A panel and its manufacturing method are provided.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a cross-sectional view showing a first embodiment of the present invention. The organic EL panel 1 is obtained by forming a laminate 3 on a substrate 2. The laminate 3 includes a color filter 4, a planarizing layer 5, a barrier layer 6, an insulating layer 7, and an organic EL element 8. The organic EL element 8 is formed by sequentially laminating a first electrode 9, an organic layer 10 including a light emitting layer, and a second electrode 11.

  The substrate 2 is made of a glass material or a translucent resin material, and the organic EL element 8 is disposed on the substrate 2. The light L emitted from the organic EL element 8 is emitted from the substrate 2 side.

  The color filter 4 includes a red filter 4a having a red pigment, a green filter 4b having a green pigment, and a blue filter 4c having a blue pigment. On the substrate 2, a printing method, a photolithography method, or the like. Is formed. Each of the filters 4a, 4b, and 4c is formed by dissolving or dispersing the respective dyes in a translucent resin material. Moreover, since each filter 4a, 4b, 4c is formed in different thickness, a level | step difference arises for every filter. If the layers are laminated in this state, the electrodes and the wiring may be cut. Therefore, the planarizing layer 5 made of an organic material for planarizing the filters 4a, 4b, and 4c is provided on the color filter 4. .

  For example, the planarizing layer 5 is formed by applying an acrylic resin or the like on the color filter 4 and spin coating or slit coating.

  On the planarizing layer 5, a barrier layer 6 made of ITO is formed. The barrier layer 6 is formed by sputtering using an ITO film forming apparatus.

  The barrier layer 6 serves as a barrier that prevents moisture and outgas generated from the organic substances of the color filter 4 and the planarizing layer 5 from entering the organic layer 10. ITO does not absorb moisture or outgas. Therefore, moisture and outgas do not enter the organic EL element 8 through the barrier layer 6, and damage to the organic EL element 8 can be suppressed. In addition, since the same material ITO film is formed by the same ITO film forming apparatus that forms the first electrode 9 described later in detail, the manufacturing cost can be reduced.

  The insulating layer 7 is made of an insulating material such as an acrylic resin, and is formed by a photolithography method. The insulating layer 7 is formed to ensure insulation between the barrier layer 6 and the first electrode 9.

  The first electrode 9 serving as an anode is formed by laminating ITO on the insulating layer 7 by a sputtering method using the same ITO film forming apparatus as that forming the barrier layer 6.

  The organic layer 10 is formed by sequentially laminating a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, and an electron injection layer from the first electrode 9 side by a vapor deposition method or the like. It will be. In the embodiment of the present invention, it is sufficient if it has at least a light emitting layer.

  The second electrode 11 that is a cathode is formed by depositing a metallic conductive material such as aluminum (Al) by vapor deposition or sputtering, and is disposed on the organic layer 10.

  The organic EL panel 1 configured as described above uses ITO as the barrier layer 6 so that moisture and outgas generated from the color filter 4 and the flattening layer 5 enter the organic layer 10 with the barrier layer 6 as a barrier. Therefore, it is possible to extend the lifetime of the organic EL element 8.

  In addition, by using ITO of the same material for the barrier layer 6 and the first electrode 9, the manufacturing cost can be reduced.

  In addition, in the formation process of the barrier layer 6 and the formation process of the first electrode 9, it is possible to reduce the manufacturing cost by sharing the ITO film forming apparatus.

  FIG. 2 is a cross-sectional view of an organic EL panel 1 showing a second embodiment of the present invention. The same or corresponding parts as those in the conventional example and the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  The organic EL panel 1 includes a substrate (hereinafter referred to as a sealing plate) 2 that is a sealing member, a laminate 3, and a support substrate 12.

  The support substrate 12 is a flat plate member made of a glass material, and supports the organic EL element 8.

  The organic EL element 8 includes a first electrode 9 serving as an anode, an organic layer 10 and a second electrode 11 serving as a cathode, and is formed on the sealing substrate 12 by a vapor deposition method or the like. The first electrode 9 is made of ITO, which is a translucent conductive material.

  The sealing plate 2 is formed by forming a recess 13 by sandblasting, cutting or etching a flat plate member made of, for example, a glass material. In the recess 13 of the sealing plate 2, the color filter 4, the planarization layer 5, and the barrier layer 6 are sequentially stacked. The barrier layer 6 containing ITO is formed so as to cover the color filter 4 and the planarization layer 5.

  The sealing plate 12 on which the color filter 4, the planarizing layer 5, and the barrier layer 6 are disposed is hermetically disposed on the substrate 2 via an adhesive 14 made of, for example, an ultraviolet curable resin material. The laminate 3 is sealed with the sealing plate 2 and the support substrate 12. The light L emitted from the organic EL element 8 is emitted from the sealing plate 2 side.

  The organic EL panel 1 configured as described above includes the barrier layer 6 containing ITO, thereby suppressing damage to the organic EL element 8 caused by moisture and outgas generated from the color filter 4 and the planarization layer 5. It is possible to extend the life of the organic EL element 8.

  In addition, by using ITO of the same material for the barrier layer 6 and the first electrode 9, the manufacturing cost can be reduced.

  In addition, in the formation process of the barrier layer 6 and the formation process of the first electrode 9, it is possible to reduce the manufacturing cost by sharing the ITO film forming apparatus.

  In the embodiment of the present invention, the color filter 4 is used, but a CCM may be used.

  In the embodiment of the present invention, the planarization layer 5 is provided, but it is not necessary and is optional.

1 is a cross-sectional view of an organic EL panel showing a first embodiment of the present invention. Sectional drawing of the organic electroluminescent panel which shows 2nd embodiment of this invention.

Explanation of symbols

1 Organic EL panel 2 Substrate (sealing plate)
4 color conversion layer (color filter)
6 Barrier layer 9 First electrode (anode)
10 Organic layer 11 Second electrode (cathode)
12 Support substrate

Claims (12)

  An organic EL panel comprising: a substrate; a color conversion layer; a barrier layer containing ITO; a first electrode containing ITO; an organic layer containing a light emitting layer; and a second electrode. .   2. The color conversion layer, the barrier layer, the first electrode, the organic layer, and the second electrode are sequentially stacked on the substrate. The organic EL panel described. In an organic EL panel comprising a substrate in which a color conversion layer and a barrier layer are sequentially stacked, and a support substrate in which a first electrode, an organic layer, and a second electrode are sequentially stacked.
The organic EL panel, wherein the substrate and the support substrate are disposed so that the barrier layer and the second electrode face each other.   The organic EL panel according to claim 1, further comprising a planarization layer between the color conversion layer and the barrier layer.   The organic EL panel according to claim 1, further comprising an insulating layer that insulates the barrier layer and the first electrode between the barrier layer and the first electrode.   The organic EL panel according to claim 1, wherein the barrier layer is provided by a sputtering method. An organic EL panel manufacturing method comprising a substrate, a color conversion layer, a barrier layer, a first electrode, an organic layer including a light emitting layer, and a second electrode,
A barrier layer forming step of forming a barrier layer containing ITO on the color conversion layer formed on the substrate using an ITO film forming device; and a first step of containing ITO on the barrier layer using the ITO film forming device. And a first electrode forming step of forming one electrode. A method for producing an organic EL panel, comprising:   8. The color conversion layer, the barrier layer, the first electrode, the organic layer, and the second electrode are sequentially stacked on the substrate. Manufacturing method of organic EL panel.   The color conversion layer and the barrier layer covering the color conversion layer are sequentially laminated on the substrate, and the first electrode, the organic layer, and the second electrode are formed on a support substrate. The organic EL panel according to claim 7, wherein the substrate and the support substrate are disposed via an adhesive so that the barrier layer and the second electrode face each other. Method.   The method of manufacturing an organic EL panel according to claim 7, further comprising a planarization layer forming step of forming a planarization layer between the color conversion layer and the barrier layer.   8. An insulating layer forming step of forming an insulating layer that insulates the barrier layer and the first electrode between the barrier layer forming step and the first electrode forming step. The manufacturing method of the organic electroluminescent panel of description.   The method for manufacturing an organic EL panel according to claim 7, wherein the ITO film forming apparatus is a sputtering apparatus.

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