JP2000150141A - Organic electroluminescent element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep luminous characteristics stable with ease over a long period of time by providing an adsorption film made by dispersing a specific amount of inorganic desiccant in a matrix of a specific straight-chain aliphatic polyamide in an airtight container for housing a layered body made by disposing an organic luminescent layer between electrodes. SOLUTION: An organic luminescent layer containing an organic compound is disposed between electrodes confronting each other so as to form a layered body. The layered body is disposed on a support body and housed in an airtight container made of glass or of a metallic material with a space provided around it. An adsorption film is formed on at least a part of an inner surface of the airtight container. The adsorption film is made up by dispersing an inorganic desiccant compound of 1 wt.% or more in a polymer matrix having, as a major constituent, an alcohol-soluble straight-chain aliphatic polyamide having an N-methoxy-methylated functional group having a constituent unit expressed by an expression (where, R is a methylene chain with 1 to 6 C, (m) is an integer from 1 to 12, and (n) is an integer not less than 1}. Oxygen and water in the container are thereby adsorbed and removed, and thus the deterioration of luminous characteristics is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic electroluminescence (electroluminescence) element (hereinafter abbreviated as "EL element") suitably used in a display element or a light-emitting element used for various information devices. Relates to an organic EL device capable of maintaining stable light-emitting characteristics for a long period of time.

[0002]

2. Description of the Related Art In recent years, information has been diversified. Among them, display devices in the information field are "beauty, light, thin,
Excellent development is being pursued, and active development is being pursued for lower power consumption and faster response. In particular, various display devices for high-definition full-color display have been devised.

As an element having characteristics such as viewing angle dependence and high-speed response, Tang et al. In the second half of 1980 reported that 1000 cd / m ^{2 at} an applied voltage of 10 V.
Since a stacked organic EL device capable of obtaining the above high luminance was reported (Appl. Phys. Lett., 51, 91).
3 (1987)), organic EL devices have been actively studied for practical use. Further, similar devices using organic polymer materials are also being actively developed.

Since an organic EL element can realize a high current density at a low voltage, higher luminous luminance and luminous efficiency can be expected as compared with an inorganic EL element and an LED, and further, it has an advantage of being a self-luminous element. I have.

Therefore, a display element using an organic EL element (multicolor light emission) has high luminance and high contrast, low voltage driving and high luminous efficiency, high resolution, high visibility, fast response speed, miniaturization and colorization. It has excellent features such as lightness and thinness, and is expected to be applied to a flat panel display that satisfies “beauty, lightness, thinness, and excellence” from the above points.

The configuration of the organic EL light-emitting element has a typical laminated structure in which an organic polymer thin film is laminated on the anode 2. For example, (1) anode (transparent electrode) / organic light-emitting layer / cathode (electrode) (2) anode (transparent electrode) / hole injection layer / organic light emitting layer / cathode (electrode) (3) anode (transparent electrode) / organic light emitting layer / electron injection layer / cathode (electrode) (4) anode (transparent electrode) ) / Hole injecting layer / organic light emitting layer / electron injecting layer / cathode (electrode).
No. 21163, JP-A-5-114487, JP-A-5-114487
94876, JP-A-5-94877, JP-A-5-1
No. 25360, JP-A-5-134430, JP-A-6-360
JP2002242, JP-A-6-234969, JP-A-7
-11245, JP-A-7-11246, JP-A-7-
142168, JP-A-7-282975, JP-A-8
JP-A-213171, JP-A-8-227276, JP-A-8-236273, JP-A-8-279394, JP-A-8-302340, JP-A-8-315981, JP-A-9-022782, JP-A-9-92 102393,
JP-A-9-153395, JP-A-9-209833
JP-A-9-204984, JP-A-9-20498
5, JP-A-9-209127, JP-A-9-2320
No. 75, JP-A-9-283279, JP-A-9-293
589, JP-A-9-298090, JP-A-9-30
No. 6666, JP-A-9-306668, JP-A-9-3
No. 30791, JP-A-9-330792, JP-A-10-330792
-012378, JP-A-10-012379, JP-A-10-012380, JP-A-10-012383
JP-A-10-022072, JP-A-10-022
076, JP-A-10-039792 and JP-A-10-
No. 069981, JP-A-10-088889, JP-A-10-092583, JP-A-10-106746,
JP-A-10-106753, JP-A-10-12547
No. 1, JP-A-10-125472, JP-A-10-12
It can be formed by the method disclosed in each gazette such as 5473.

The problem of such an organic EL device is that the carrier must be efficiently injected from the outside because it is made of an organic insulator having no carrier inside, and the transport efficiency of the injected hole / electron carrier is improved. It is necessary to increase the probability of recombination and increase the luminous efficiency, it is necessary to obtain a color balance of multi-color light emission, high luminance and high luminous efficiency, especially, the organic thin film material,
The film quality can be prevented from changing due to heat, moisture, gas, etc.
It must be chemically stable and the interface and surface of the formed film must be smooth.

However, today, a green monochrome organic EL display for use in a vehicle has been commercialized by Tohoku Pioneer since November 1997, and in order to meet the diversifying needs of society in the future, the above demands have been met. Therefore, practical use of an organic EL display as long-term stability, high-speed response, multicolor display, and high-definition full-color display is urgently required. In particular, the performance indispensable as a high-performance display device is a fine color display function, and its long-term stability is important for practical use (functional materials, Vo).
l. 18, No. 2, page 96).

An organic EL element having a laminated structure in which a layer made of an organic polymer material is laminated between electrodes is a current-driven element. Therefore, in order to emit light, a current is applied between the electrodes (anode, cathode). Must be shed. However, when driven for a certain period, there is a disadvantage that initial light emission characteristics such as light emission luminance are significantly reduced.

[0010] The deterioration of the light emission characteristics proceeds during the storage as well as during the energization. In particular, the deterioration is accelerated by the oxygen and moisture existing around the element and the oxygen and moisture existing as adsorbed substances in the organic laminated film are reduced. This is considered to be affected by the moisture adsorbed on the parts at the time of manufacturing the element, the infiltration of the moisture at the time of manufacture, and the like, and also affected by the moisture that permeates and penetrates from a defective portion of the sealing layer.

If oxygen or moisture is present in the device, the oxygen or moisture promotes oxidation or agglomeration of the material constituting the device laminate, which causes deterioration of the device. A typical example of the deterioration of the device due to oxidation or moisture is generation and growth of dark spots. The dark spot is a light emission defect point. As oxidation proceeds during driving and storage, the existing dark spots grow and spread over the entire light emitting surface. In order to suppress the occurrence of such dark spots, it is important to seal the element structure.

In order to suppress the generation of dark spots, a method of disposing phosphorus pentoxide as a desiccant in an airtight container and sealing the hollow (Japanese Patent Laid-Open No. 3-26191), further contains this phosphorus pentoxide Although a method employing a structure in which a protective layer and a sealing layer are laminated has been proposed (JP-A-7-169567), in these methods, phosphoric acid is generated by moisture, which may adversely affect the organic laminate. . Furthermore, a method of filling an inert liquid containing a desiccant on the laminate and in an airtight container (JP-A-5-41281, JP-A-5-28181)
No. 35868), a method using a pressure-sensitive adhesive (U.S. Pat. No. 5,304,419) and the like have also been proposed.

[0013]

However, there has not yet been provided an organic EL device which maintains stable light emitting characteristics for a long period of time. That is, no leak current or crosstalk occurs in the above method, but it is necessary to sufficiently suppress the generation and growth of dark spots in order to obtain long-term stable light emission characteristics.

For this purpose, it is important to eliminate the above-mentioned causes of deterioration of the light emission characteristics, and a drying means having a long-lasting effect must be taken.

The mere use of a desiccant is not persistent, and the desiccant must not adhere to the organic light-emitting element due to powder falling or the like. For that purpose, a uniform and persistent adsorption film is required, and it must be easily available in terms of cost and process.

That is, there is a demand for an organic EL device which can suppress the influence of moisture and the like on the device with good sustainability and is excellent in process and cost.

Accordingly, an object of the present invention is to provide a drying means capable of suppressing oxidation of a device laminated structure material from oxygen or moisture entering a device for a long period of time with good sustainability in a manufacturing process, during driving and during storage. It is an object of the present invention to provide an organic EL device which is provided with a uniform adsorption film as above, so as not to adversely affect the device, and which facilitates processes such as handling at the time of encapsulation. As a result, the growth of dark spots of the element is suppressed with good sustainability, and stable light emission characteristics can be maintained over a long period of time.

[0018]

Means for Solving the Problems The present inventors have made intensive studies to solve the above-mentioned many problems, and as a result, adopted a specific polymer as a drying means and dispersed a desiccant compound in the polymer matrix. As a result, they have found that the above object can be achieved, and have completed the present invention.
That is, the present invention is as follows.

(1) An organic light emitting device comprising an organic light emitting layer comprising an organic compound and an organic light emitting layer disposed between electrodes facing each other, a laminate formed on a support, and an airtight container provided with a space around the laminate. In the electroluminescent device, at least a part of the inner surface of the hermetic container is provided with the following general formula (I): (Wherein, R is a methylene chain having 1 to 6 carbon atoms, m is 1 to 12
, And n represents an integer of 1 or more.) In a polymer matrix having a functional group-containing alcohol-soluble linear aliphatic polyamide as a main component, the inorganic desiccant compound is contained in an amount of 1% by weight. It is characterized in that an adsorbing film dispersed as described above is formed.

(2) The organic electroluminescent device, wherein the desiccant compound is an alkali metal oxide or an alkaline earth metal oxide alone or in a composite.

(3) In the organic electroluminescence device, a main component of the desiccant compound has a particle size of 1-2.
This is an organic electroluminescence device which is a 00-micron γ-type activated alumina.

(4) In the organic electroluminescent device, the linear aliphatic polyamide component represented by the general formula (I) forms a polymer matrix alone or in a mixed form of 50% by weight or more. It is.

(5) In the organic electroluminescence element, the airtight container is an organic electroluminescence element made of glass or a metal material.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, an organic EL device according to an embodiment of the present invention comprises an organic light emitting layer 3 (a hole injection layer 3-1 and a hole transport layer) on a support 1. 3-2, light emitting layer 3
-3, between the electrodes where the electron injection layer 3-4) faces each other 2,
4 to form a laminate, and the light-emitting element composed of the laminate is used to seal the airtight container 5 from the outside air.
Is housed inside. On the inner surface of the hermetic container 5, as a drying means, a functional group (N-
A coating agent in which a solid drying agent is dispersed in a matrix polymer mainly composed of a straight-chain aliphatic polyamide having a methoxyalkyl group) is formed by a printing method, a spin coating method, a casting method, or the like. 7 is achieved. Note that reference numeral 8 in the figure represents an external circuit.

The adsorbing film 7 formed as a drying means in the present invention prevents oxygen and moisture from entering the organic EL element from the outside after sealing, and also prevents oxygen and moisture from entering during the manufacturing process of the element. In addition, it has the property of adsorbing oxygen and moisture existing in the interior from the beginning and hardly releasing oxygen or moisture etc. once adsorbed, as an effect in favor of suppressing the generation and growth of dark spots. preferable.

In view of the above, the shape of the inorganic desiccant dispersed and used in the adsorption film 7 according to the present invention is not particularly limited, but the powdery one has a larger adsorption area. So desirable.

Examples of the inorganic desiccant compound usable in the present invention include alkali metal oxides, alkaline earth metal oxides, sulfates, metal halides, and perchlorates. , Alkali metal oxides or alkaline earth metal oxides are preferred. Specifically, activated alumina, silicon earth, activated carbon, phosphorus pentoxide, magnesium perchlorate, potassium hydroxide, calcium oxide, zinc chloride,
Examples thereof include metals such as barium oxide, lithium, beryllium, potassium, magnesium, calcium, zeolite, and silica gel. These compounds may be used alone or in combination of two or more.

Since such a desiccant compound must be used while maintaining a sufficient adsorption capacity, it is necessary to perform an activation treatment for removing adsorbed oxygen and moisture before use. preferable. This activation method
For example, in a state of being shielded from the outside air,
Various methods can be employed, such as performing heat treatment at a temperature of not less than ° C. to remove oxygen and moisture.

In the present invention, a system containing γ-type activated alumina as a main component is preferred in view of each property, stability, compatibility with the copolymer according to the present invention, and ease of handling. Particularly preferred.

The amount of the desiccant compound used is required to be 1% by weight or more in the matrix polymer in order to obtain a desired effect, and the more the amount, the higher the effect. There is a correlation between the particle size and the effect, and there is also a relationship with the polymer in the dispersion system, but 2 to 180% by weight is preferable from the viewpoint of fluidity, adhesion to a container, and film forming property. The same is related to the particle size, the larger the surface area, the greater the effect, and the appropriate particle size from the relationship with the matrix polymer.In view of the above, in the present invention, the average particle size is preferably 1-2
00 microns, more preferably 2 to 130 microns.

In the present invention, the alcohol-soluble linear aliphatic polyamide represented by the above general formula (I) is used as the main component of the polymer matrix forming the adsorption film 7, but the acrylic resin, epoxy resin, alkyd resin A general-purpose coating resin such as a polyvinyl resin, a polyurethane resin, and an imide resin can be used in combination.

The alcohol-soluble linear aliphatic polyamide used in the adsorption membrane 7 according to the present invention is obtained by chemically reacting a linear aliphatic polyamide (nylon) with formamide and a target alkyl alcohol to partially form an amide bond. N
-Methoxymethylated. The methoxy methylation degree (MM degree) of the amide bond is preferably about 5 to 50%, m of the methylene chain is preferably 2 to 7, and R in the amide bond chain is a methylene chain having 1 to 5 carbon atoms. preferable. The molecular weight of such an alcohol-soluble linear aliphatic polyamide is not particularly limited. The alcohol-soluble linear aliphatic polyamide itself also has a function of adsorbing oxygen and moisture, has excellent holding properties, and is excellent in adhesion to containers and the like.

Specific examples of the alcohol-soluble linear aliphatic polyamide according to the present invention include: Type 8 nylon manufactured by Unitika Co., Ltd.
5, T-8-E "Nippon Rilsan Co., Ltd .: Platabond Product name" M99
5, M1276 "manufactured by Teikoku Chemical Industry Co., Ltd .: Toresin Product name" F-30, M
F-30, EF-30T, FS-350, FS-50
0 "and the like, but are not limited thereto.

By dispersing the above desiccant in a polymer matrix containing alcohol-soluble linear aliphatic polyamide as a main component, the effect of enhancing the adsorbability of oxygen and moisture and preventing the release of adsorbed substances is remarkably obtained. Can increase. In this way, by chemically removing oxygen and moisture in the device, generation and growth of dark spots can be significantly suppressed. The alcohol-soluble linear aliphatic polyamide may be used alone or in combination with another polymer as described above.However, the matrix polymer according to the present invention is subjected to a treatment for impurities and is similar to the activation treatment for the desiccant compound. Then, it is preferable to dry at 120 ° C. for 1 hour or more under vacuum to remove water. The thus obtained polymer and the desiccant compound are dissolved at 2 pp.
m is dispersed in a glove box having a diameter of m or less, and a film is formed inside the airtight container by the above method, whereby the adsorption film 7 is obtained.

The support 1 in the element structure of the present invention is not limited as long as it has excellent light transmittance. For example, besides glass, a plastic substrate such as polyacryl or polycarbonate may be used, but a glass substrate is generally used. The hermetic container 5 that blocks the organic light emitting element from the outside air can be made of glass or a metal such as stainless steel or aluminum.

An anode 2 as an organic light emitting device was formed on a support 1.
The airtight container 5 in which the organic light emitting layer 3 and the cathode 4 are laminated and the adsorption film 7 is formed thereon as described above is sealed in an environmental atmosphere (2 ppm or less for each) in which the moisture and the oxygen concentration are controlled. . As the sealing agent at this time, an adhesive used as a sealing agent for a liquid crystal or the like, for example, a room temperature curing type represented by an epoxy resin or an ultraviolet curing type from a productivity to an ultraviolet curing type, or a combination of ultraviolet curing and temperature combination of a cationic polymerization type. By using a type of adhesive or the like, and further dispersing a glass spacer material or a plastic spacer material as a gap agent in the adhesive and performing bonding as the sealing layer 6, the organic EL device of the present invention is obtained. Obtainable.

In the organic EL device of the present invention, the adsorbing film as a drying means is formed on the inner surface of an airtight container for shielding the organic light emitting device composed of a laminate from the outside air.
There is no generation or growth of dark spots, light emission characteristics can be stably maintained for a long time, and sufficient endurance to practical use can be achieved.

[0038]

EXAMPLES Hereinafter, the organic EL device of the present invention will be described in more detail with reference to Examples. First, a production example of an organic EL light-emitting laminate will be described. Fig. 1 shows the organic EL for evaluation of this prototype.
It is a schematic sectional drawing which shows the layer constitution of a layer. First, a transparent electrode (ITO) was entirely formed as an anode 2 on a transparent glass substrate as a support 1 by a sputtering method. Patterning is performed on ITO using a resist agent (Tokyo Ohka Co., Ltd .: OPP)
R-800), a 0.096 mm line,
A mask capable of obtaining a line pattern at a pitch of 0.11 mm was exposed on a glass substrate at 200 mJ / cm ² (365 nm), and the above-mentioned ITO line pattern was obtained using a developer (NMD-3, manufactured by Tokyo Ohka Co., Ltd.). .

Next, the substrate was mounted in a resistance heating evaporation apparatus, and the hole injection layer 3-1, the hole transport layer 3-2, the light emission layer 3-3, and the electron injection layer 3 were formed as the organic EL light emitting layer 3. No. 4 and a film were sequentially formed without breaking the vacuum to obtain an organic EL light emitting laminate. During film formation, the pressure in the vacuum chamber was reduced to 1 × 10 ⁻⁴ Pa. The hole injection layer 3-1 is made of copper phthalocyanine (CuPc)
Was laminated in a thickness of 100 nm. The hole transport layer 3-2 has 4,4′-
Bis [N- (1-naphthyl) -N-phenylamino] biphenyl (α-NPD) was laminated to a thickness of 20 nm. Light emitting layer 3
-3 was obtained by laminating 4,4′-bis (2,2-diphenylvinyl) biphenyl (DPVBi) to a thickness of 30 nm. The electron injection layer 3-4 was formed by laminating aluminum chelate (Alq) to a thickness of 20 nm.

Thereafter, the substrate is taken out of the vacuum chamber,
After being newly installed in the resistance heating evaporation apparatus, 200 nm of Mg / Ag (10: 1 weight ratio) was formed as the cathode 4 in the direction orthogonal to the anode 2. It goes without saying that the material of the organic EL light-emitting laminate is not limited to the above-mentioned materials.

Example 1 N-methoxymethylated polyamide resin (Toresin:
F30K, manufactured by Teikoku Chemical Industry Co., Ltd.) at 120 ° C.
After drying under vacuum for 5 hours to remove adsorbed moisture, the polymer was dissolved in anhydrous ethyl alcohol to a solid content of 15% by weight to prepare a polymer solution. In addition, an average particle size of 50 as a desiccant is used.
After activating micron γ-type alumina under vacuum at 200 ° C. for 2 hours, the solid content of the polymer solution was reduced to 100% in a glove box having an oxygen dissolved concentration of 2 ppm or less.
100 parts by weight of the treated desiccant was dispersed in parts by weight.

The solution for an adsorption film thus obtained is
A film is formed on the inner surface of an airtight container (sealing glass) 5 made of glass,
Dried on a hot plate at about 120 ° C. In the obtained airtight container, the organic EL light-emitting laminate formed by laminating an organic light-emitting layer between electrodes on a glass support was sealed. The sealing is performed by using a cationic polymerization type ultraviolet-curing adhesive (3025G, manufactured by Three Bond Co., Ltd.) in which a glass spacer is dispersed as a sealing agent, and using a dispenser on the outer periphery of the sealing glass 5. And bonded to a glass substrate under the above-mentioned environment.
This was performed by curing at an illuminance of 000 mJ / cm ² .

As an evaluation method of the obtained organic EL device,
The light was emitted and the light emission state of the dark spot was initially observed in an enlarged photograph, and the generation and growth of the dark spot were observed in an accelerated test of the dark spot in a 60 ° C., 90% temperature and humidity environment.
As a result, generation and growth of dark spots were hardly observed. FIG. 2 shows the result.

Example 2 The desiccant in Example 1 was replaced with the above matrix polymer 1.
An organic EL light emitting device was formed by dispersing 50 parts by weight with respect to 00 parts by weight, forming an adsorption film in the same manner as in Example 1, and sealing the same as in Example 1.

Example 3 Instead of the desiccant in Example 1, a mixed desiccant obtained by mixing activated γ-type alumina and barium oxide (BaO) at a ratio of 2: 1 (% by weight) was used. In place of the above matrix polymer, a polymer manufactured by Unitika Co., Ltd. (trade name: T-8-
Using E), 100 parts by weight of the mixed desiccant was dispersed in 100 parts by weight of the polymer to form an adsorption film in the same manner as in Example 1, and sealed in the same manner as in Example 1 to obtain an organic compound. An EL element was formed.

Example 4 Instead of the matrix polymer in Example 1, a mixed polymer obtained by using the polymer used in Example 1 and a general-purpose hydroxy-modified polyacrylic resin in a ratio of 2: 1 (% by weight) was used. 100 parts by weight of the same desiccant as in Example 1 was dispersed in 100 parts by weight of the mixed polymer to form an adsorption film in the same manner as in Example 1 and sealed by the same method. Was formed.

COMPARATIVE EXAMPLE 1 An organic EL light emitting device was manufactured in the same manner as in Example 1 except that the adsorption film was not formed on the inner surface of the airtight container.

Comparative Example 2 Only the polymer used in Example 1 was formed on the inner surface of the airtight container without using the desiccant in Example 1, and the others were used in Example 1.
Sealing was performed in the same manner as described above to produce an organic EL light emitting device.

Comparative Example 3 The desiccant in Example 1 was fixed on an adhesive tape, an adsorption film was formed on the inner surface of the container using this adhesive, and the other parts were sealed in the same manner as in Example 1. Thus, an organic EL light emitting device was manufactured.

For each of Examples 2 to 4 and Comparative Examples 1 to 3, the same dark spot acceleration test as in Example 1 was performed.
evaluated. As a result, as shown in FIG. 2, almost no dark spot growth was observed in Examples 1 to 4 according to the present invention as compared with Comparative Examples 1 to 3.

[0051]

As described in detail above, according to the present invention,
Presence of oxygen and moisture that adversely affect the element
It can be suppressed strongly and can be manufactured at low cost in the process. As a result, generation and growth of dark spots can be suppressed with good continuity without causing leakage current or crosstalk. Therefore, it has become possible to provide an organic EL light-emitting element having a long element life while maintaining stable light-emitting characteristics for a long time.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an organic EL device according to one embodiment of the present invention.

FIG. 2 is a graph showing a relationship between time and a dark spot diameter in Examples and Comparative Examples.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Support 2 Anode 3 Organic light emitting layer 3-1 Hole injection layer 3-2 Hole transport layer 3-3 Light emitting layer 3-4 Electron injection layer 4 Cathode 5 Airtight container 6 Sealing layer 7 Adsorption film 8 External circuit

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3K007 AB12 AB13 AB18 BB01 BB05 DA01 DB03 EB00 FA01 FA02 4J002 CL071 DE056 DE066 FD206 GP00

Claims (5)

[Claims] 1. An organic electroluminescent device comprising: a laminate having an organic light-emitting layer containing an organic compound disposed between electrodes facing each other, formed on a support; and an airtight container provided with a space around the laminate. In the luminescence element, at least a part of the inner surface of the hermetic container has the following general formula (I): (Wherein, R is a methylene chain having 1 to 6 carbon atoms, m is 1 to 12
, And n represents an integer of 1 or more.) In a polymer matrix having a functional group-containing alcohol-soluble linear aliphatic polyamide as a main component, the inorganic desiccant compound is contained in an amount of 1% by weight. An organic electroluminescence device, wherein an adsorption film dispersed as described above is formed. 2. The organic electroluminescent device according to claim 1, wherein the desiccant compound is an alkali metal oxide or an alkaline earth metal oxide alone or in a composite. 3. The method according to claim 1, wherein the main component of the desiccant compound has a particle size of 1-2.
3. An activated alumina of .gamma. Type having a thickness of 00 microns.
The organic electroluminescent device according to the above. 4. The polymer matrix according to claim 1, wherein the linear aliphatic polyamide component represented by the general formula (I) forms a polymer matrix alone or in a mixed form of 50% by weight or more. Organic electroluminescence element. 5. The organic electroluminescence device according to claim 1, wherein the airtight container is made of glass or a metal material.