CN100438120C - Organic electroluminescent panel and its mfg. method - Google Patents

Abstract

Organic EL panel and its manufacturing method. An organic EL panel (10) includes a support substrate (11) and an organic EL device (12) which is mounted on the support substrate and formed by interposing an organic layer containing at least a luminescent layer between a pair of electrodes. By bonding a cover (13) onto the support substrate (11) through an adhesive agent (15), an enclosing space is formed by enclosing the organic EL device (12) with the support substrate (11) and the cover (13). A colored desiccating member (14) is provided within the enclosing space on the internal surface of the cover (13) opposite to the support substrate (11). To improve the contrast of display surface and to eliminate an appearance trouble that desiccating member inside panel will be seen from the display side.

Description

Organic electroluminescence panel and manufacturing method thereof

technical field

The present invention relates to an organic electroluminescent (hereinafter referred to as EL: Electroluminescence) panel and a manufacturing method thereof.

Background technique

The organic EL panel is based on an organic EL element, which is formed by arranging the organic EL element as a unit surface light-emitting component on a flat substrate. The organic EL element is formed by forming a first electrode on a supporting substrate, and then forming An organic layer including a light-emitting layer made of an organic compound, on which a second electrode is formed.

It is known that the characteristics of an organic EL panel deteriorate when the organic layers and electrodes are exposed to the outside air. This is caused by the infiltration of water into the interface between the organic layer and the electrode, hindering the injection of electrons, and then producing dark spots as non-luminous regions, or by corrosion of the electrodes. In order to improve the stability and durability of organic EL elements, use Sealing technology to isolate organic EL elements from the outside air is essential. Regarding this sealing technique, a method of bonding a sealing member covering the electrodes and the organic layer with an adhesive to a support substrate on which the electrodes and the organic layer are formed is generally employed.

FIG. 1 shows the prior art of this organic EL panel (see Patent Document 1 below). An organic EL panel (organic EL element) 1 is composed of a glass substrate 2 serving as a support substrate, a laminate 6 composed of an ITO electrode 3, an organic luminescent material layer 4, and a cathode 5, a glass sealing pot 7 serving as a sealing member, a drying member 8, and Sealing material 9 constitutes.

The drying unit 8 is provided to absorb and remove the initial moisture present therein and the moisture released or infiltrated over time after being sealed by the glass airtight jar 7 . In particular, since the organic layer forming the organic EL element is weak against heat, moisture cannot be removed by heat treatment before sealing, so such initial moisture cannot be completely discharged. Therefore, in a panel using a conventional organic EL material, such a drying member 8 has to be provided in the sealing member. In the following patent document 1, it is described that as the desiccant member 8, a compound that can chemically absorb moisture and maintain a solid state even if it absorbs moisture is used, and the desiccant member 8 is attached to the inner surface of the glass airtight container 7 using an adhesive material. (the surface facing the glass substrate).

Patent Document 1 Japanese Patent Laid-Open No. 9-148066

In such a conventional organic EL panel, the support substrate (glass substrate 2 ) side of the organic EL element is made a transparent substrate, and light is emitted from the support substrate side (bottom surface emission system). In this case, there will be a phenomenon that external light enters the inside of the panel (the sealed space surrounded by the support substrate and the sealing member (glass can 7)) from the support substrate, etc., and then the incident light enters the sealed space. The inner surface of the member (the surface facing the support substrate) or the surface of the drying member provided on the inner surface is reflected and emitted from the display surface of the support substrate. In addition, although most of the light emitted by the organic EL element is set to be emitted from the light-emitting surface of the supporting substrate, some of the light may become scattered light in the panel, which is the same as the above-mentioned external light. The inner surface of the inner surface or the surface reflection of the drying component installed on the inner surface is emitted from the display surface of the supporting substrate.

In this way, if the external light incident on the panel and the scattered light from the organic EL element are reflected on the inner surface of the sealing member or the surface of the drying member and emitted from the display surface side, a display formed by the emitted light from the organic EL element will be produced. The problem of reduced contrast.

In addition, if the light reflected on the inner surface of the sealing member or the surface of the drying member is emitted from the display surface side, when the supporting substrate is viewed directly or obliquely from the display surface, etc., the dryness arranged inside the panel may sometimes be seen. components, thereby causing a problem of adversely affecting the appearance. Therefore, if such defects in appearance are regarded as defective products, it is necessary to design with high precision to prevent the incidence of external light and scattered light, and it is also necessary to improve the accuracy of the arrangement position of the drying parts, so there is a product gap. The yield rate is reduced and the product cost is increased.

Contents of the invention

The present invention has been made to solve the above-mentioned problems. That is, the purpose of the present invention is to provide an organic EL panel and its manufacturing method, thereby improving the contrast of the display surface, eliminating the appearance defect of the drying parts inside the panel from the display surface side, and improving the quality of the finished product. rate, reduce product cost, etc.

In order to achieve the above object, the organic EL panel and its manufacturing method of the present invention have at least the following independent technical solutions.

[Technical solution 1] An organic EL panel, in which an organic EL element having an organic layer including at least a light-emitting layer is formed between a pair of electrodes on a supporting substrate, and an organic EL element is bonded to isolate the organic EL element from the outside air. The sealing member is characterized in that a colored drying member is provided on a surface of the sealing member facing the support substrate.

[Technical solution 6] A method of manufacturing an organic EL panel, comprising an element forming step of forming an organic EL element having an organic layer including at least a light-emitting layer sandwiched between a pair of electrodes on a support substrate, and making the organic EL element A sealing step in which a sealing member isolated from the outside air is bonded to the supporting substrate, wherein prior to the sealing step, a colored dry part.

Description of drawings

FIG. 1 is an explanatory diagram of the prior art.

FIG. 2 is an explanatory diagram illustrating an organic EL panel according to an embodiment of the present invention.

FIG. 3 is an explanatory diagram illustrating an organic EL panel according to another embodiment of the present invention.

FIG. 4 is an explanatory view showing an organic EL panel according to another embodiment of the present invention.

5 is an explanatory diagram showing a schematic flow of a method for manufacturing an organic EL panel according to an embodiment of the present invention.

In the figure: 10, 20, 30: organic EL panel; 11: supporting substrate; 12: organic EL element; 13, 21, 31: sealing part; 14: drying part; 15: adhesive; 15A: spacer; 16 , 21, 31, 41, 51: sealing parts; 21A, 31A: sealing recesses; 31B: mounting recesses.

Detailed ways

Hereinafter, embodiments of the present invention will be described with reference to the drawings. 2 to 4 are explanatory diagrams of an organic EL panel according to an embodiment of the present invention. In the organic EL panels 10 , 20 , and 30 , an organic EL element 12 in which an organic layer including at least a light-emitting layer is interposed between a pair of electrodes is formed on a support substrate 11 . Furthermore, the sealing member 13, 21, 31 is adhered to the support substrate 11 by the adhesive 15, thereby covering the organic EL element 12 with the sealed space surrounded by the support substrate 11 and the sealing member 13, 21, 31, so that It is isolated from the outside air. In the sealing members 13 , 21 , and 31 , a drying member 14 is provided on a surface facing the support substrate 11 , separated from the organic EL element 12 .

Here, in the organic EL panel 10 of the embodiment shown in FIG. 2 , the sealing space described above is formed by mixing the spacers 15A into the adhesive 15 using the flat sealing member 13 . In the organic EL panel 20 of the embodiment shown in FIG. 3 , the sealing recess 21A is formed on the support substrate 11 side of the sealing member 21 , and the above-mentioned sealing space is formed between the support substrate 11 and the sealing recess 21A. In the organic EL panel 30 of the embodiment shown in FIG. 4 , a sealing recess 31A is formed on the support substrate 11 side of the sealing member 31 , the above-mentioned sealing space is formed between the support substrate 11 and the sealing recess 31A, and the sealing recess Mounting recessed portion 31B for mounting drying member 14 is formed in 31A. The mounting recess 31B is closed with a moisture-permeable film 32 to prevent the drying member 14 from coming off.

In addition, in the organic EL panels 10 , 20 , and 30 according to the embodiments of the present invention, a member colored in a light-absorbing color is used as the drying member 14 . The light-absorbing color may be any color as long as it can absorb wavelengths in the visible light range, and is preferably a color that can uniformly absorb all wavelengths of visible light, such as black, gray, and dark brown. As one embodiment, dry parts that are colored substantially black or gray are used.

The drying member 14 is installed after bonding the sealing members 13, 21, 31, and is used to absorb and remove the initial moisture present in it and the moisture released or infiltrated over time, as long as it has such a function, it is not particularly limited. . As one embodiment, the following hygroscopic molded body is used, and the coloring is performed by dispersing a pigment into the molded body.

In addition, the sealing members 13 , 21 , and 31 may be formed of metal, resin, or the like as long as airtightness can be maintained, but as one embodiment, they are preferably formed of a glass substrate.

According to the organic EL panels 10 , 20 , and 30 of this embodiment, display is performed using light emitted from the support substrate 11 side, and a display surface is formed on the support substrate 11 . And, since the colored drying member 14 is provided on the surface of the sealing member 13, 21, 31 opposite to the supporting substrate 11, the colored drying member 14 absorbs the external light incident into the panel or the light from the organic EL element. The scattered light of 12 can prevent these lights from being emitted from the side of the display surface after being reflected. Thereby, the contrast of display using the light emitted from the organic EL element 12 can be improved, and the appearance defect that the drying member 14 provided inside the panel can be seen from the side of the support substrate 11 can be eliminated.

In order to prevent reflection on the inner surface of the sealing member 13, 21, 31, it is also conceivable to apply light-absorbing paint on the inner surface of the sealing member, but according to this method, an additional process of coating the inner surface of the sealing member is required, and at the same time due to the applied The paint generates a deterioration factor (moisture or organic material) of the organic EL element 12 in the sealed space, resulting in a disadvantage of shortening the life of the organic EL element 12 . According to the embodiment of the present invention, by coloring the drying member 14, the number of steps in the manufacturing process is not affected, and the deterioration factor of the organic EL element 12 does not occur in the sealed space.

In addition, by making the color of the drying member 14 black or gray with a high visible light absorption rate, it is possible to uniformly absorb all wavelengths in the visible light region of the above-mentioned external light or scattered light, and the above-mentioned function can be more reliably performed. In this way, especially in an organic EL panel that performs color display, it is possible to effectively improve the contrast and appearance defects of the display surface.

In addition, in the embodiment in which the drying member 14 is formed from a hygroscopic molded body and the coloring is performed by dispersing a pigment therein, the drying member 14 can be colored in a desired color regardless of the type or material of the drying member 14 . In this way, the above-mentioned effects can be ensured without affecting the moisture absorption function of the drying member 14 .

Furthermore, in the embodiment in which the sealing members 13 , 21 , and 31 are made of glass substrates, the following effects can be obtained in addition to the above-mentioned effects. That is, first, since the sealing members 13, 21, 31 are formed of the same material as the glass substrate generally used for the supporting substrate 11, the thermal expansion coefficients of the supporting substrate 11 and the sealing members 13, 21, 31 are the same, thereby improving The mechanical strength of the panel with respect to temperature changes. Second, since the surface smoothness of the glass substrate is higher than that of a sealing member made of metal or the like, gaps are less likely to be formed at the interface with the adhesive 15 and the adhesive force can be improved. Therefore, it is difficult for moisture and the like to infiltrate from the outside, so that the airtightness can be improved. Third, since the sealing members 13 , 21 , and 31 are formed using glass substrates, the thickness and weight of the panel can be reduced compared to the case of using metal sealing members.

Next, a method of manufacturing an organic EL panel according to an embodiment of the present invention will be described. FIG. 5 is an explanatory diagram showing a schematic flow thereof. First, as the element forming step S1A, an organic EL element 12 in which a first electrode, an organic layer, and a second electrode are laminated is formed on a supporting substrate 11, and an organic EL element 12 is formed in which an organic layer including at least a light-emitting layer is sandwiched between a pair of electrodes. EL element 12. Here, the formation of the organic EL element employs a well-known film-forming process and a patterning process generally used.

On the other hand, the drying member 14 is attached to the sealing members 13, 21, 31 as the drying member attaching step S1B. In this drying member mounting step S1B, the drying member 14 that has been previously colored by dispersion of a pigment is prepared, and it is mounted on the inner surfaces of the sealing members 13, 21, 31 (with the support substrate 11) in the same manner as in the usual drying member mounting process. opposite side).

As the sealing step S2, the adhesive 15 is applied to the periphery of the supporting substrate 11 or the bonding surface of the sealing members 13, 21, 31, and the sealing members 13, 21, 31 are bonded to the supporting substrate 11. Element 12 is sealed. Then, organic EL panels 10 , 20 , and 30 according to the embodiment are obtained through an appropriate inspection step S3 as necessary.

According to the manufacturing method of this embodiment, the organic EL panels 10 , 20 , 30 with high contrast and no appearance defects can be obtained as described above without making any changes to the conventional panel manufacturing method.

Hereinafter, the characteristics of the organic EL panel and its manufacturing method according to the embodiment of the present invention are summarized as follows.

First, an organic EL panel in which an organic EL element having an organic layer including at least a light-emitting layer is sandwiched between a pair of electrodes on a support substrate, and a sealing member is bonded to isolate the organic EL element from the outside air. , characterized in that a colored drying member is provided on the surface of the sealing member opposite to the supporting substrate. It also relates to a method of manufacturing an organic EL panel, comprising an element forming step of forming an organic EL element having an organic layer including at least a light-emitting layer sandwiched between a pair of electrodes on a support substrate, and connecting the organic EL element to the outside The sealing step of bonding an air-insulated sealing member to the support substrate, wherein prior to the sealing step, a colored drying member is attached to a surface of the sealing member opposite to the support substrate.

In this way, the colored drying member absorbs the external light incident on the panel or the scattered light from the organic EL element, which can prevent these lights from being reflected and then emitted from the display surface side, and can improve the performance by using the emitted light from the organic EL element. The contrast of the display can be improved, and at the same time, it can eliminate the appearance defect that the drying parts installed inside the panel can be seen from the support substrate side. Moreover, this advantage can be obtained without affecting the manufacturing accuracy, so it is possible to easily reduce defective products with low contrast or poor appearance, improve product yield, and reduce product cost. In addition, the production method of the present invention can obtain the above-mentioned organic EL panel having the effect of the present invention without any modification to the conventional production method.

Second, in the above-mentioned organic EL panel and its manufacturing method, the drying member is colored in a light-absorbing color, in particular, in substantially black or substantially gray. In this way, in addition to the above features, it is possible to uniformly absorb all the wavelengths of the visible light region of the above-mentioned external light or scattered light, and it is possible to perform the above-mentioned operation more reliably. In addition, especially in an organic EL panel for color display, it is possible to effectively improve the contrast and appearance defects of the display surface.

Thirdly, in the above-mentioned organic EL panel and its manufacturing method, the drying member is a hygroscopic molded body, and the coloring is performed by dispersing a pigment into the hygroscopic molded body. In this way, on the basis of the above features, regardless of the type or material of the drying member, it can be colored into a desired color, and the above effects can be obtained without affecting the moisture absorption function of the drying member.

Fourth, in the above-mentioned organic EL panel and its manufacturing method, the sealing member is a glass substrate. Thus, in addition to the above features, a thinner and lighter organic EL panel with high mechanical strength against temperature changes and good sealing performance can be obtained.

[Example]

Hereinafter, as an embodiment of the present invention, specific examples related to the constituent members of the above-mentioned embodiment will be given.

[Drying unit 14] As the drying unit 14, a physical desiccant (zeolite, silica gel, carbon, carbon nanotube, etc.), a chemical moisture absorbent described later, an organic metal complex dissolved in a petroleum solvent (toluene, dihydrogen, etc.) can be used. Monomers such as desiccants such as toluene, aliphatic organic solvents, etc.) can also be used as hygroscopic molded articles shown below.

The hygroscopic molded article is a molded article in which a hygroscopic agent is dispersed in a resin component (binder). As the hygroscopic agent, any substance may be used as long as it has a function of at least absorbing moisture, but a compound that can chemically adsorb moisture and maintain a solid state even after absorbing moisture is particularly preferable. Examples of such compounds include metal oxides, metal salts of inorganic acids and organic acids, and it is particularly preferable to use at least one of alkaline earth metal oxides and sulfates. Examples of alkaline earth metal oxides include calcium oxide (CaO), barium oxide (BaO), magnesium oxide (MgO), and the like. Examples of sulfates include lithium sulfate (Li ₂ SO ₄ ), sodium sulfate (Na ₂ SO ₄ ), calcium sulfate (CaSO ₄ ), magnesium sulfate (MgSO ₄ ), cobalt sulfate (CoSO ₄ ), gallium sulfate (Ga ₂ (SO ₄ ) ₃ ), titanium sulfate (Ti(SO ₄ ) ₂ ), nickel sulfate (NiSO ₄ ), etc. Other hygroscopic organic materials can also be used as hygroscopic agents.

On the other hand, the resin component (binder) is not particularly limited as long as it does not interfere with the moisture removal function of the moisture absorbent, and it is preferable to use a material with high air permeability (that is, a material with low barrier properties, especially an air-permeable resin). . Examples of such materials include polymer materials such as polyolefins, polyacrylics, polyacrylonitriles, polyamides, polyesters, epoxies, and polycarbonates. Among them, polyolefins are preferable in the present invention. Specifically, polyethylene, polypropylene, polybutadiene, polyisoprene, etc., their copolymers, etc. are mentioned.

The content of the hygroscopic agent and the resin component can be appropriately set according to their types, etc., but generally, when the total content of the hygroscopic agent and the resin component is 100% by weight, the moisture absorbent is about 30% by weight to 85% by weight, and the resin component is about 30% by weight. 70% by weight to 15% by weight will suffice. Preferably, the hygroscopic agent is about 40% to 80% by weight, and the resin component is about 60% to 20% by weight. Most preferably, the moisture absorbent is about 50% to 70% by weight, and the resin component is about 50% to 30% by weight.

A hygroscopic molded body can be obtained by uniformly mixing the above components and molding into a desired shape. In this case, it is preferable to dry the hygroscopic agent, the gas adsorbent, etc. sufficiently beforehand before mixing. Moreover, when mixing with a resin component, it can heat and make it into a molten state as needed.

As an embodiment of the present invention, the hygroscopic molded article is preferably one obtained by molding a mixture composed of a hygroscopic agent and a resin component. That is, using materials that do not contain third components such as solvents to produce hygroscopic moldings can avoid the disadvantages caused by these third components remaining in the moldings (for example, the remaining solvent is absorbed by the hygroscopic agent) , reduce the performance of the adsorbent, or the disadvantages caused by the volatilization of the remaining solvent in the sealing part over time).

When mounting on the sealing members 13, 21, 31, there are no particular limitations as long as it can be reliably fixed in the sealing members. For example, known adhesives and adhesives (preferably solvent-free A method of bonding a hygroscopic molded body and a sealing member, such as a method of bonding a hygroscopic molded body to a sealing member, a method of thermally cladding a hygroscopic molded body on a sealing member, and a method of fixing a molded body to a sealing member by using a fixing member such as a screw method etc.

The pigment to be dispersed for coloring is not related to the type of inorganic or organic, but it is appropriate to select a material that does not emit factors deteriorating the organic EL element.

[Sealing member] The sealing member 13, 21, 31 is preferably formed of a substrate made of glass (soda glass or non-alkali glass). The above-mentioned sealing recesses 21A, 31A are formed, for example, by performing processing such as press molding, etching, and sand blasting.

[Adhesives] Adhesives 15 are heat-curable, chemical-curable (two-liquid mixture), light (ultraviolet)-curable, and other adhesives. Acrylic resins, epoxy resins, polyesters, and polyolefins can be used as materials. wait. In particular, ultraviolet curable epoxy resins are preferably used. To this adhesive, an appropriate amount (about 0.1% to 0.5% by weight) of a spacer (preferably a glass or plastic spacer) having a particle diameter of 1 to 100 μm is mixed, and then coated with a dispenser or the like.

[Organic EL element] The specific structure and material examples of the organic EL element 12 formed on the supporting substrate 11 and sandwiching an organic layer including at least a light-emitting layer between a pair of electrodes are as follows.

(a) Support substrate:

The support substrate 11 is preferably in the form of a transparent plate or sheet, and glass, plastic, or the like can be used as the material.

(b) electrode

In the case of a method of emitting light from the support substrate 11 side (bottom surface emission method), the electrode on the support substrate 11 side is an anode made of a transparent electrode, and the other electrode is a cathode made of a metal electrode. As an applicable anode material, ITO, ZnO, etc. can be used, and it can form by a film-forming method, such as vapor deposition and sputtering. As the cathode, metals with small work functions, metal oxides, metal fluorides, alloys, etc., specifically, single-layer structures such as Al, In, and Mg, and stacked structures such as LiO ₂ /Al can be used. film formation methods such as sputtering.

(c) Organic layer

When the electrode on the side of the supporting substrate 11 is used as an anode and the other electrode is used as a cathode, the organic layer generally has a stacked structure of a hole transport layer/light emitting layer/electron transport layer, and multiple layers of more than one layer may be provided. In the laminated light-emitting layer, hole transport layer, and electron transport layer, any one of the hole transport layer and the electron transport layer may be omitted, or both layers may be omitted and only the light-emitting layer may be left. As the organic layer, organic functional layers such as a hole injection layer, an electron injection layer, a hole shielding layer, and an electron shielding layer may be inserted depending on the application.

The material of the organic layer can be appropriately selected according to the use of the organic EL element 12 . Examples are listed below, but not limited thereto.

As the hole transport layer, it is only necessary to have a function of high hole mobility, and the material thereof can be selected from any of conventionally known compounds. As specific examples, hematoporphyrin compounds such as copper phthalocyanine blue, aromatic tertiary amines such as 4,4'-bis[N-(1-naphthyl)-N-phenylamino]-biphenyl (NPB), 4 Organic materials such as stilbene compounds such as -(di-p-tolylamino)-4'-[4-(di-p-tolylamino)styryl]stilbene, triazole derivatives, and styrylamine compounds. In addition, a polymer dispersion type material in which a low molecular weight organic material for hole transport is dispersed in a polymer such as polycarbonate can also be used.

Known light-emitting materials can be used for the light-emitting layer. As specific examples, aromatic dimethyl compounds such as 4,4'-bis(2,2'-biphenylvinyl)-biphenyl (DPVBi), 1, 4-bis(2-methylstyryl) benzene and other styrene benzene compounds, 3-(4-biphenyl)-4-phenyl-5-tert-butylphenyl-1,2,4-triazole ( Triazole derivatives such as TAZ), fluorescent organic materials such as anthraquinone derivatives and fluorenone derivatives, fluorescent organometallic compounds such as (8-hydroxyquinoline) aluminum complex (Alq ₃ ), poly(p-phenylene vinylene) (PPV) type, polyfluorene type, polyvinylcarbazole (PVK) type polymer materials, platinum complexes or iridium complexes and other triplet excitons can use fluorescent organic materials (Special Table 2001-520450 ). The light-emitting material may be composed of only the above-mentioned light-emitting materials, or may contain a hole-transporting material, an electron-transporting material, additives (donors, acceptors, etc.), luminescent dopants, and the like. In addition, these substances can also be dispersed in polymer materials or inorganic materials.

The electron transport layer is only required to have the function of transferring electrons injected from the cathode to the light emitting layer, and its material can be selected from conventionally known compounds. As specific examples, organic materials such as nitro-substituted fluorenone derivatives, anthracenomethane derivatives, metal complexes of 8-hydroxyquinoline derivatives, metal phthalocyanine blue, and the like can be used.

The above-mentioned hole transport layer, light-emitting layer, and electron transport layer can be coated by spin coating, dipping, etc., wet processes such as spraying, screen printing, or dry processes such as evaporation and laser transfer printing. craft formation.

[Various forms of organic EL panel] The organic EL element 12 may be an organic EL element with a single structure, or may have a desired pattern structure and constitute a plurality of pixels.

In the case of the latter, the display method can be single-color light emission, or multi-color light emission of two or more colors, especially in order to realize the organic EL panel of multi-color light emission, it can be constructed in the following way, forming Including the method of forming three kinds of light-emitting functional layers corresponding to RGB, the method of forming two or more light-emitting functional layers (separate coating method), the single-color light-emitting functional layer such as white or blue combined with a color filter, or by fluorescent The method of color conversion layer formed by materials (CF method, CCM method), the method of realizing multi-color light emission by irradiating electromagnetic waves to the light emitting region of the monochromatic light emitting functional layer (photofading method), etc. In addition, the driving method of the organic EL element may be either a passive driving method or an active driving method.

Claims (6)

1. An organic electroluminescent panel, on a supporting substrate, an organic electroluminescent element is formed with an organic layer containing at least a light-emitting layer sandwiched between a pair of electrodes, and the organic electroluminescent element is bonded with the organic electroluminescent element. The external air-insulated sealing member is characterized in that a colored drying member is provided on the surface of the sealing member opposite to the supporting substrate, and the drying member is colored in light-absorbing black, gray or dark brown . 2. The organic electroluminescence panel according to claim 1, wherein the drying member is a hygroscopic molded body, and the coloring is performed by dispersing a pigment into the hygroscopic molded body. 3. An organic electroluminescent panel, on a support substrate, an organic electroluminescent element is formed with an organic layer containing at least a light-emitting layer sandwiched between a pair of electrodes, and the organic electroluminescent element is bonded with the organic electroluminescent element. A glass substrate as a sealing member isolated from outside air, characterized in that a colored drying member is provided on a surface of the sealing member opposite to the supporting substrate, and the drying member is colored in light-absorbing black , gray or dark brown, the dry part is a hygroscopic molded body, and the coloring is carried out by dispersing pigments into the hygroscopic molded body. 4. A method for manufacturing an organic electroluminescent panel, comprising an element forming step of forming an organic electroluminescent element having an organic layer including at least a light-emitting layer sandwiched between a pair of electrodes on a support substrate, and making the organic electroluminescent element The sealing step of adhering a sealing member that isolates the luminescence element from the outside air on the support substrate, is characterized in that, prior to the sealing step, a pre-installed Pigmented dry parts that are colored a light absorbing black, gray or dark tan color. 5. The method for manufacturing an organic electroluminescent panel according to claim 4, wherein the drying member is a hygroscopic molded body, and the coloring is performed by dispersing a pigment into the hygroscopic molded body. 6. A method for manufacturing an organic electroluminescent panel, comprising an element forming step of forming an organic electroluminescent element having an organic layer including at least a light-emitting layer sandwiched between a pair of electrodes on a support substrate, and making the organic electroluminescent element A sealing step in which a glass substrate serving as a sealing member that isolates the luminescent element from the outside air is bonded to the supporting substrate, wherein, before the sealing step, the sealing member facing the supporting substrate is A colored dry part is installed on the face of the machine, the dry part is colored into light-absorbing black, gray or dark brown, and the dry part is a hygroscopic molded body, which is formed by dispersing pigments into the hygroscopic molded body. The coloring is carried out.

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