KR20040087937A - Organic el panel and method for manufacturing the same - Google Patents

Abstract

PURPOSE: An organic EL(Electro-Luminescence) panel and a manufacturing method therefor are provided to reduce a product cost through manufacturing improvement and to improve contrast by preventing a drying member in the panel from being visible from a display side. CONSTITUTION: An organic EL(Electro-Luminescence) panel manufactured using following steps. An organic EL element(12) having an organic layer including at least a light emitting layer sandwiched between a pair of electrodes is formed on a support substrate(11). A sealing member(13) isolating the organic EL element from outside air is adhered to the organic EL element. A colored drying member(14) is implemented on a side facing the support substrate on the sealing member. The drying member is colored with light absorbing colors. The color of the drying member is substantially black or gray.

Description

Organic EL panel and its manufacturing method {ORGANIC EL PANEL AND METHOD FOR MANUFACTURING THE SAME}

The present invention relates to an organic EL (ElectroLuminescence) panel and a method of manufacturing the same.

The organic EL panel forms a first electrode on a supporting substrate, forms an organic layer including a light emitting layer made of an organic compound thereon, and forms a second electrode thereon, based on the organic EL element. The organic EL element is arranged on a flat substrate as a unit surface light emitting element.

This organic EL panel is known to deteriorate when the above-mentioned organic layer and the electrode are exposed to the outside air. This is caused by the phenomenon that the injection of electrons is disturbed by moisture invading the interface between the organic layer and the electrode, and a dark spot as an unluminous area is generated or the electrode is corroded. Thus, the stability and durability of the organic EL element are improved. For this purpose, a sealing technique for blocking the organic EL element from outside air is indispensable. In this sealing technique, the means for bonding the sealing member which covers this electrode and an organic layer through an adhesive agent is generally employ | adopted on the support substrate in which the electrode and the organic layer were formed.

The prior art (see Japanese Patent Laid-Open No. 9-148066) of such an organic EL panel is shown in FIG. The organic EL panel (organic EL element) 1 is a glass substrate 2 serving as a supporting substrate, a laminated body 6 composed of an ITO electrode 3, an organic light emitting material layer 4, and a cathode 5, and a sealing member. It consists of the glass sealing tube 7, the drying member 8, and the sealing material 9 which become.

After sealing with the glass sealing tube 7, the drying member 8 is provided in order to absorb and remove the initial moisture which exists in it, and the moisture which released | released or penetrated in time. In particular, the organic layer forming the organic EL element is susceptible to heat and can not be removed by heat treatment before sealing, and thus such initial moisture cannot be completely excluded. Therefore, in the panel using the present organic EL material, such a drying member 8 must be provided in the sealing member. Japanese Patent Application Laid-Open No. 9-148066 discloses that the drying member 8 is made of the glass sealing tube 7 by using a compound which adsorbs chemically as the drying member 8 and maintains a solid state even when the moisture is absorbed. The thing attached to the inner surface (opposite surface with a glass substrate) using an adhesive material is described.

In such a conventional organic EL panel, the support substrate (glass substrate 2) side of an organic EL element is made into a transparent substrate, and the system (low emission system) which extracts light from the support substrate side is employ | adopted. In this case, external light enters the inside of the panel (the sealing space surrounded by the supporting substrate and the sealing member (glass sealing tube 7)) from the supporting substrate or the like, and this is the inner surface of the sealing member (the opposing surface with the supporting substrate) or the like. A phenomenon occurs that reflects off the surface of the drying member attached to the inner surface and exits from the display surface of the support substrate. In addition, although most of the light emitted from the organic EL element is set to be emitted from the light emitting surface of the supporting substrate, some of the light becomes stray light in the panel, and the inner surface of the sealing member is the same as the external light described above. Or it may reflect from the surface of the drying member attached to the inner surface, and may be emitted from the display surface of a support substrate.

As described above, when external light incident on the panel and stray 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, the contrast of the display by the light emitted from the organic EL element is reduced. There is a problem of deterioration.

Moreover, when the light reflected from the inner surface of the sealing member or the surface of the drying member is emitted from the display surface side, the drying member attached to the inside of the panel may be seen directly when viewed from the display surface or at an angle to the support substrate. This also causes problems that are undesirable in appearance. In addition, when such appearance problems are regarded as defective products, it is necessary to accurately prevent external light incidence and stray light generation and to improve the accuracy of the attachment position of the drying member, resulting in a problem in that the product yield falls and the product cost increases.

This invention makes it an example of a subject to deal with such a problem. That is, in the organic EL panel and its manufacturing method, the contrast of the display surface is improved, and the problem of the appearance of the drying member inside the panel is seen from the display surface side, thereby improving the yield of the product and lowering the product cost. This is an object of the present invention.

In order to achieve this object, the organic EL panel or the manufacturing method thereof according to the present invention includes at least the configuration according to each of the following independent claims.

Claim 1 An organic EL panel comprising an organic EL element sandwiching an organic layer including a light emitting layer at least between a pair of electrodes on a supporting substrate, and bonding a sealing member to block the organic EL element from outside air. The organic electroluminescent panel characterized by providing the colored drying member in the surface opposite to the said support substrate in the said sealing member.

[Claim 6] An element forming step of forming an organic EL element sandwiching at least an organic layer including a light emitting layer between a pair of electrodes on a supporting substrate, and a sealing member for blocking the organic EL element from outside air. A manufacturing method of an organic EL panel having a sealing step bonded to a surface, wherein the colored drying member is attached to an opposing surface of the supporting substrate in the sealing member prior to the sealing step.

1 is an explanatory diagram of a prior art.

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

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

4 is an explanatory diagram 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 of manufacturing an organic EL panel according to embodiments of the present invention.

<Explanation of symbols for the main parts of the drawings>

10, 20, 30: organic EL panel

11: support substrate

12: organic EL device

13, 21, 31: sealing member

14: drying member

15: adhesive

15A: Spacer

16, 21, 31, 41, 51: sealing member

21A, 31A: sealing recess

31B: Attachment Recess

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described with reference to drawings. 2-4 is explanatory drawing explaining the organic electroluminescent panel which concerns on one Embodiment of this invention. This organic EL panel 10, 20, 30 forms the organic EL element 12 which clamped the organic layer containing a light emitting layer at least between a pair of electrodes on the support substrate 11. As shown in FIG. Then, the sealing members 13, 21, 31 are bonded to the supporting substrate 11 through the adhesive 15, so that the organic EL element 12 is supported by the supporting substrate 11 and the sealing members 13, 21, 31. It is covered with an enclosed sealing space and is blocked from outside air. In the sealing member 13, 21, 31, the drying member 14 is formed in isolation | separation with the organic electroluminescent element 12 in the opposing surface with the support substrate 11.

Here, in the organic EL panel 10 of the embodiment shown in FIG. 2, the sealing member 13 of the flat plate is used, and the sealing space mentioned above is formed by mixing the spacer 15A in the adhesive agent 15, have. Moreover, in the organic EL panel 20 of embodiment shown in FIG. 3, 21 A of sealing recesses are formed in the support substrate 11 side of the sealing member 21, and it seals with the support substrate 11 The sealing space mentioned above is formed between 21 A of recesses. Moreover, in the organic EL panel 30 of embodiment shown in FIG. 4, 31 A of sealing recesses are formed in the support substrate 11 side of the sealing member 31, and the support substrate 11 and the sealing recesses are formed. The sealing space mentioned above is formed between 31A, and the attachment recessed part 31B for attaching the drying member 14 is formed in the sealing recessed part 31A. Moreover, this attachment recessed part 31B is blocked by the moisture permeable film 32 in order to prevent the fall of the drying member 14. As shown in FIG.

And the organic EL panel 10, 20, 30 which concerns on embodiment of this invention uses what was colored by the light absorbing color as the drying member 14. As shown in FIG. The light absorbing color should just be able to absorb the wavelength of visible region, Preferably black, gray, dark brown, etc. can absorb all the wavelengths of visible light uniformly. In one embodiment, those that are colored approximately black or approximately gray are used.

This drying member 14 is provided to absorb and remove the initial moisture present therein and the moisture released or penetrated in time after adhesion of the sealing members 13, 21, 31, and has such a function. It will not be specifically limited if it is. In one embodiment, the above-mentioned coloring is achieved by disperse | distributing a pigment in the molded object using the hygroscopic molded object mentioned later.

Moreover, what is necessary is just to be able to maintain the airtightness, and the sealing member 13, 21, 31 can be formed by metal or resin, etc., As one Embodiment, it is preferable to form by a glass substrate.

According to the organic electroluminescent panels 10, 20, and 30 of such embodiment, it displays with the light emitted from the support substrate 11 side, and the display surface is formed on the support substrate 11. As shown in FIG. And since the colored drying member 14 is provided in the opposing surface with respect to the support substrate 11 in the sealing member 13, 21, 31, from the external light which entered in the panel, or from the organic EL element 12, The colored drying member 14 is absorbed by the stray light, and these light can be prevented from being reflected and emitted from the display surface side. Thereby, the contrast of the display by the light emitted from the organic EL element 12 can be improved, and the appearance problem of the drying member 14 provided inside the panel on the support substrate 11 side 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 a light-absorbing paint to the inner surface of the sealing member, but according to such means, a step of coating the inner surface of the sealing member is required separately. At the same time, a deterioration factor (moisture or organic material) of the organic EL element 12 is generated in the sealed space from the applied paint, resulting in a problem that the life of the organic EL element 12 is reduced. 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 is not generated in the sealed space.

In particular, by making the color of the drying member 14 black or gray with a high visible light absorption rate, the entire wavelength in the visible light region of the external light or stray light can be uniformly absorbed. It becomes possible to carry out. In addition, this can effectively improve the contrast and appearance problems of the display surface, especially in the organic EL panel displaying color display.

Moreover, in embodiment which forms the above-mentioned coloring by forming the dry member 14 by the hygroscopic molded object, and disperse | distributing a pigment in it, it is possible to color with a required color irrespective of the kind or material of the dry member 14. do. Thereby, the above-mentioned action can be ensured without affecting the moisture absorption function of the drying member 14.

Moreover, in embodiment which used the sealing member 13, 21, 31 as a glass substrate, the following action can be acquired in addition to the above-mentioned action. That is, since the sealing members 13, 21, 31 are formed of the same material as the glass substrate generally used as the support substrate 11, the support substrate 11 and the sealing members 13, 21, 31 are first. The thermal expansion coefficient of) is the same, it is possible to improve the mechanical strength of the panel against temperature changes. Secondly, the glass substrate has a higher surface smoothness than the sealing member such as metal, so that a gap is hardly formed at the interface with the adhesive 15, and the adhesive force can be increased. Therefore, moisture and the like are less likely to invade from the outside, and the sealing performance can be improved. Third, by forming the sealing members 13, 21, and 31 from the glass substrate, the panel can be made thinner and lighter than in the case of employing the metal sealing member.

Next, the manufacturing method of the organic EL panel which concerns on embodiment of this invention is demonstrated. 5 is an explanatory diagram showing a schematic flow thereof. First, in the element formation step S1A, the organic EL element 12 in which the first electrode, the organic layer, and the second electrode are laminated on the support substrate 11 is formed, and at least a light emitting layer is included between the pair of electrodes. An organic EL element 12 formed by sandwiching an organic layer to be formed is formed. Here, the well-known film-forming process and pattern formation process generally employ | adopted for formation of organic electroluminescent element are employ | adopted.

On the other hand, in the drying member attachment step S1B, the drying member 14 is attached to the sealing members 13, 21, and 31. In this drying member attaching step (S1B), the drying member 14, which has been previously colored by the dispersion of the pigment, is prepared, and this is the same as the normal drying member attaching step, and the inner surface of the sealing members 13, 21, 31 [support] Facing the substrate 11].

In the sealing step S2, the adhesive 15 is applied to the periphery of the support substrate 11 or the adhesive surfaces of the sealing members 13, 21, and 31, and the sealing members 13, 21, and the like on the support substrate 11. 31 is bonded to seal the organic EL element 12. After that, the organic EL panels 10, 20, 30 of the embodiment can be obtained through an appropriate inspection step (S3) as necessary.

According to the manufacturing method of this embodiment, the organic EL panels 10, 20, and 30, which have no appearance problems with high contrast as described above, can be obtained without substantially changing the conventional panel manufacturing method.

The features of the organic EL panel and its manufacturing method according to the embodiment of the present invention are as follows.

Firstly, as an organic EL panel in which an organic EL element sandwiching at least an organic layer including a light emitting layer is formed between a pair of electrodes on a supporting substrate, and a sealing member for blocking the organic EL element from outside air is bonded. A colored drying member is provided on the opposing surface of the sealing member with the supporting substrate. An element forming step of forming an organic EL element sandwiching at least an organic layer including a light emitting layer between a pair of electrodes on a supporting substrate and a sealing member for blocking the organic EL element from outside air are bonded to the supporting substrate. The manufacturing method of the organic electroluminescent panel which has a sealing process WHEREIN: The colored drying member is stuck to the opposing surface of the said support substrate in the said sealing member before the said sealing process, It is characterized by the above-mentioned.

According to this, since the colored drying member absorbs the external light incident in the panel or stray light from the organic EL element, it is possible to prevent these light from being reflected and emitted from the display surface side, thereby preventing the emitted light from the organic EL element. The contrast of the display can be improved, and the appearance problem of the drying member provided inside the panel on the support substrate side can be solved. And since such an advantage can be obtained irrespective of manufacturing precision, the yield of the product which becomes a defective goods by a low contrast or an appearance problem can be improved simply and easily, and a product cost can be reduced. Moreover, in the manufacturing method, an effective organic EL panel can be obtained as mentioned above, without substantially changing the conventional panel manufacturing method.

Secondly, in the above-mentioned organic EL panel and its manufacturing method, the drying member is colored in a light absorbing color, in particular, approximately black or approximately gray. This makes it possible to uniformly absorb the electric field in the visible light region of the external light or stray light, in addition to the above-described features, making it possible to perform the above-described operation more reliably. In addition, particularly in the organic EL panel displaying color display, problems of contrast and appearance of the display surface can be effectively improved.

Third, in the above-mentioned organic EL panel and its manufacturing method, the said drying member is a hygroscopic molded object, The said coloring is performed by disperse | distributing a pigment in this hygroscopic molded object, It is characterized by the above-mentioned. Thereby, in addition to the above-mentioned characteristic, it becomes possible to color with a required color irrespective of the kind or material of a drying member, and the above-mentioned effect can be acquired without affecting the moisture absorption function of a drying member.

Fourthly, in the above-mentioned organic EL panel and its manufacturing method, the sealing member is a glass substrate. Thereby, in addition to the above-mentioned feature, an organic EL panel having high mechanical strength against temperature change, high sealing performance, and thinning and weight can be obtained.

EXAMPLE

Hereinafter, the specific example regarding the structural member of embodiment mentioned above is demonstrated, and it is set as the Example of this invention.

[Drying member] As the drying member 14, a physical drying agent (zeolite, silica gel, carbon, carbon nanotube, etc.), a chemical moisture absorbent, an organometallic complex described later, are added to a petroleum solvent (toluene, xylene, aliphatic organic solvent, etc.). The melted desiccant etc. can be used individually, and the hygroscopic molded object shown below can also be used.

A hygroscopic molded object is a molded object which disperse | distributed the moisture absorbent to the resin component (binder). What is necessary is just to have a function which can adsorb | suck moisture at least as a moisture absorbent, Especially it is good that it is a compound which maintains a solid state, even if it adsorb | sucks moisture chemically and absorbs moisture. Examples of such a compound include metal oxides, inorganic acid salts and organic acid salts of metals, 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 the sulfate 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 ), and gallium sulfate (Ga ₂ (SO _{4). 3} ), titanium sulfate (Ti (SO ₄ ) ₂ ), nickel sulfate (NiSO ₄ ), and the like. In addition, an organic material having hygroscopicity can also be used as the hygroscopic agent.

On the other hand, the resin component (binder) is not particularly limited as long as it does not interfere with the water removal action of the moisture absorbent. Preferably, a material having high gas permeability (that is, a material having low barrier property, particularly a gas permeable resin) is used. Examples of such materials include polymer materials such as polyolefins, polyacryls, polyacrylonitriles, polyamides, polyesters, epoxys, and polycarbonates. Among these, in this invention, it is preferable that it is polyolefin type. Specific examples thereof include polyethylene, polypropylene, polybutadiene, polyisoprene and the like and copolymers thereof.

What is necessary is just to set content of a moisture absorbent and a resin component suitably according to these types, etc., Usually, the total amount of a moisture absorber and a resin component shall be 100 weight%, and what is necessary is just about 30 to 85 weight% and a moisture component about 70 to 15 weight%. . Preferably it is about 40 to 80 weight% of a moisture absorbent, 60 to 20 weight% of a resin component, Most preferably, it is about 50 to 70 weight% of a moisture absorbent, and 50 to 30 weight% of a resin component.

A hygroscopic molded object is obtained by mixing each of these components uniformly and molding into a desired shape. In this case, it is preferable to mix | blend a moisture absorbent, a gas adsorption agent, etc., after fully drying previously. In addition, in mixing with a resin component, you may heat and make it molten as needed.

As an Example of this invention, it is preferable that a hygroscopic molded object is obtained by shape | molding the mixture which consists of a moisture absorbent and a resin component. That is, by producing a hygroscopic molded article using a material that does not contain a third component such as a solvent, the harmful effects of these third components remaining in the molded article (e.g., the remaining solvent is adsorbed by the hygroscopic agent to reduce the performance of the adsorbent). Or damage due to volatilization of the remaining solvent in the sealing member over time.

The attachment to the sealing members 13, 21, 31 is not particularly limited as long as it is a method that can be securely fixed in the sealing member. For example, the hygroscopic molded body and the sealing member are known adhesives and adhesives (preferably solvent-free adhesives). The method of sticking with a etc., the method of heat-sealing a hygroscopic molded object to a sealing member, the method of fixing a molded object to a sealing member with fixing members, such as a vis, etc. are mentioned.

Pigments dispersed for coloring are not limited to inorganic and organic, but it is best to select a material that does not emit deterioration factors for organic EL devices.

[Sealing member] The sealing members 13, 21, 31 are preferably formed of a substrate made of glass (soda glass or alkali free glass). The above-mentioned sealing recessed parts 21A and 31A are formed by performing processes, such as press molding, an etching, and a blast process, for example.

ADHESIVE The adhesive 15 uses adhesives, such as a thermosetting type | mold, a chemical hardening type (liquid mixing), and a light (ultraviolet) hardening type, and can use an acrylic resin, an epoxy resin, polyester, a polyolefin, etc. as a material. In particular, it is preferable to use an ultraviolet curing epoxy resin. To such an adhesive, a spacer having a particle diameter of 1 to 100 µm (preferably a spacer of glass or plastic) is appropriately mixed (about 0.1 to 0.5% by weight) and applied using a dispenser or the like.

[Organic EL Element] A concrete structure and material example 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) a support substrate;

As the support substrate 11, it is preferable that it is flat form and film form which have transparency, and glass, plastic, etc. can be used as a material.

(b) an electrode;

On the premise of a method of emitting light from the support substrate 11 side (low emission method), the electrode on the support substrate 11 side is an anode made of a transparent electrode, and the other electrode is made of a metal electrode. A cathode is used. ITO, ZnO, etc. can be used as a positive electrode material applied, and can be formed by film-forming methods, such as vapor deposition and sputtering. As the cathode, such as a small work function metal, a metal oxide, metal fluoride, an alloy, specifically, Al, In, deposition, such as by using a laminated structure of a single-layer structure, such as LiO ₂ / Al, such as Mg, vapor deposition, sputtering, It can form by a method.

(c) an organic layer;

In the organic layer, when the electrode on the support substrate 11 side is an anode and the other electrode is a cathode, a lamination structure of a hole transporting layer / light emitting layer / electron transporting layer is generally used. Alternatively, a plurality of layers may be laminated and provided, and either of the layers may be omitted, or both layers may be omitted to form only the light emitting layer. Moreover, as an organic layer, organic functional layers, such as a hole injection layer, an electron injection layer, a hole barrier layer, an electron barrier layer, can be inserted according to a use.

The material of the organic layer can be appropriately selected according to the use of the organic EL element 12. Although an example is shown below, it is not limited to these.

The hole transport layer should just have the function of high hole mobility, and can use arbitrary materials from a conventionally well-known compound as the material. Specific examples include porphyrin compounds such as copper phthalocyanine, aromatic third amines such as 4,4'-bis [N- (1-naphthyl) -N-phenylamino] -biphenyl (NPB), and 4- (di-p Stilbene compounds, such as -tolylamino) -4 '-[4- (di-p-tolylamino) styryl] steel benzene, and organic materials, such as a triazole derivative and a styrylamine compound, are used. Moreover, the material of the polymer dispersion system which disperse | distributed the low molecular weight organic material for hole transport in polymers, such as polycarbonate, can also be used.

A well-known light emitting material can be used for a light emitting layer, As an example, Aromatic dimethylidene compounds, such as 4,4'-bis (2,2'- diphenylvinyl) -biphenyl (DPVBi), and 1, 4-bis (2) Styrylbenzene compounds such as -methyl styryl) benzene, and triazole derivatives such as 3- (4-biphenyl) -4-phenyl-5-t-butylphenyl-1,2,4-triazole (TAZ); Fluorescent organic materials such as anthraquinone derivatives and fluorenone derivatives, fluorescent organometallic compounds such as (8-hydroxyquinolinato) aluminum complex (Alq ₃ ), polyparaphenylenevinylene (PPV), and polyfluorene Polymeric materials, such as a polyvinylcarbazole (PVK) system, and the organic material (Japanese Patent Publication 2001-520450) which can utilize phosphorescence from triplet excitons, such as a platinum complex and an iridium complex, can be used for light emission. It may consist of only the above-mentioned light emitting material, and may contain a hole transport material, an electron transport material, an additive (donor, acceptor, etc.), a luminescent dopant, etc. In addition, they may be dispersed in a polymer material or an inorganic material.

The electron transporting layer should just have a function which transfers the electron injected from the cathode to the light emitting layer, As a material, arbitrary things can be selected and used out of a conventionally well-known compound. As a specific example, organic materials, such as a nitro substituted fluorenone derivative and an anthraquinodimethane derivative, the metal complex of 8-quinolinol derivatives, a metal phthalocyanine, etc. can be used.

The hole transport layer, the light emitting layer, and the electron transport layer may be formed by a wet process such as a spin coating method, a coating method such as a dipping method, a printing method such as an inkjet method, a screen printing method, or a dry process such as a deposition method or a laser transfer method. have.

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

In the latter case, the display method may be monochromatic light emission or two or more colors of multi-color light emission. In particular, in order to realize an organic EL panel of multi-color light emission, a method of forming three types of light emitting functional layers corresponding to RGB may be employed. A method of forming a light emitting functional layer containing two or more colors (divided coating method), or a method of combining a color conversion layer made of a color filter or fluorescent material with a monochromatic light emitting functional layer such as white or blue (CF method, CCM method) And a method of realizing a plurality of light emission by irradiating electromagnetic waves to the light emitting region of the monochromatic light emitting functional layer (photo-bleaching method) or the like. The drive method of the organic EL element may be either a passive drive method or an active drive method.

The present invention has the effect of improving the yield of the product by lowering the product cost by improving the contrast of the display surface and solving the appearance problem seen by the drying member inside the panel from the display surface side.

Claims (10)

An organic EL panel in which an organic EL element sandwiching an organic layer including at least a light emitting layer is formed between a pair of electrodes, and a sealing member for blocking the organic EL element from outside air is bonded. An organic electroluminescent panel characterized by providing a colored drying member on an opposing surface of the supporting substrate in. The organic EL panel according to claim 1, wherein the drying member is colored with a light absorbing color. The organic EL panel according to claim 1 or 2, wherein the drying member is colored approximately black or approximately gray. The organic EL panel according to any one of claims 1 to 3, wherein the drying member is a hygroscopic molded article, and the coloring is performed by dispersing a pigment in the hygroscopic molded article. The organic EL panel according to any one of claims 1 to 4, wherein the sealing member is a glass substrate. An element forming step of forming an organic EL element sandwiching at least an organic layer including a light emitting layer on a pair of electrodes between the pair of electrodes, and sealing for bonding the sealing member for blocking the organic EL element from outside air to the supporting substrate. A manufacturing method of an organic EL panel having a step, wherein a colored drying member is attached to an opposing surface of the supporting substrate in the sealing member prior to the sealing step. 7. The method for producing an organic EL panel according to claim 6, wherein the drying member is colored with a light absorbing color. The method for producing an organic EL panel according to claim 6 or 7, wherein the drying member is colored approximately black or approximately gray. The said drying member is a hygroscopic molded object, The said coloring is performed by disperse | distributing a pigment in this hygroscopic molded object, The manufacturing method of the organic electroluminescent panel in any one of Claims 6-8 characterized by the above-mentioned. The method for producing an organic EL panel according to any one of claims 6 to 9, wherein the sealing member is a glass substrate.