JP2002324664A - Organic EL device - Google Patents

Abstract

(57) Abstract: Provided is an organic EL device having improved durability by preventing deterioration of an organic compound layer. SOLUTION: An organic EL element 1 includes an anode 3, a cathode 5, a single or a plurality of organic compound layers 4 sandwiched between these electrodes on a transparent support 2, and an anode 3 and a transparent support 2. A polymer layer 6 containing a pendant type ultraviolet absorber is provided between them. Further, the polymer layer 6 having a pendant type ultraviolet absorber may be provided on the transparent support 2 opposite to the anode 3. Further, a protective layer (not shown) may be further provided on the polymer layer 6, and the polymer layer 6 or the protective layer may be used in combination as a sealant.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an organic EL device, and more particularly, to an organic EL device having improved durability by preventing deterioration of an organic compound layer.

[0002]

2. Description of the Related Art In recent years, with the diversification and space saving of information devices, there has been an increasing need for flat display elements which consume less power and have a smaller space occupation area than CRTs. As such a flat display element, there are a crystal, a plasma display, and the like. In particular, recently, an organic EL element that is self-luminous, has a clear display, and can be driven at a low DC voltage has been increasingly expected. As the element structure of the organic EL element,
Until now, a two-layer structure (a structure in which a hole injection / transport layer and a light emitting layer are formed between an anode and a cathode (SH-A structure))
No. 9-194393, Appl. Phys. Let
t. 51, 913 (1987)) or a structure in which a light emitting layer and an electron injection / transport layer are formed between an anode and a cathode (SH).
-B structure) (USP No. 5085947;
No. 25092, Appl. Phys. Lett. 5
5, 1489 (1989)) or a three-layer structure (a structure in which a hole injection / transport layer / light-emitting layer / electron injection / transport layer is formed between an anode and a cathode (DH structure)) (Appl. Phys.
s. Lett. 57, 531 (1990)) and the like.

More recently, an EL device structure composed of two or more hole injection / transport layers or electron injection / transport layers has been reported (Japanese Patent Laid-Open No. 5-94880, US Pat.
P4727204). Au or ITO as the anode
An electrode material having a large work function such as (indium-tin oxide) is used, and an electrode material having a small work function such as Ca, Mg, Al, or an alloy thereof is used as a cathode.

[0004] To date, the above hole injection / transport layer has
Various organic compounds have been reported as materials usable for the light emitting layer and the electron injection transport layer. The organic materials used for these are, for example, aromatic third
Amines, phthalocyanines, etc., and aluminum trisoxine (Japanese Patent Laid-Open No. 59-194)
393, JP-A-63-295695), styrylamine derivatives, styrylbenzene derivatives (JP-A-2-209988), aminopyrene derivatives, and the like.
As the electron injection / transport layer, an oxadiazole derivative (Chemical Society of Japan No. 11, 1540 (1991), JP-A-4-363894, JP-A-5-202011) is used.
No. Gazette) has been reported.

Until now, by using various element structures and organic materials, an EL element having a high luminance of 1000 cd / m ² or more and a driving voltage of 10 V or less has been initially obtained. Further, as a characteristic of organic materials, various new materials have been invented by molecular design and the like, and luminescence of three primary colors of R, G, and B has been actively studied.

[0006] However, these organic EL elements are liable to deteriorate due to oxidation, moisture, ultraviolet rays, etc., and impair the function as a light emitting element. Therefore, the organic EL structure is covered and sealed with glass, metal, or the like. Furthermore, a method of disposing a moisture absorbent to prevent oxidation by water vapor (JP-A-5-41281) and a method of filling an inert liquid (JP-A-8-781)
No. 59), a method of filling a gel-coated body (Japanese Unexamined Patent Publication No.
No. 2,049,811), and a method of applying a photocurable resin on an organic EL element (Japanese Patent Application Laid-Open No. 4-267097).

However, all of the above-mentioned methods have insufficient sealing effects, cannot suppress the deterioration of the device, and have difficulty in extending the life of the device. One of the reasons that the deterioration of the organic EL element cannot be suppressed is ultraviolet rays from the transparent support side. Acrylic glass, which is a commonly used support, allows ultraviolet rays having a wavelength of 300 nm or more to pass therethrough, so that the ultraviolet rays from the transparent support side cause the organic compound layer to deteriorate. Therefore, a method is known in which a layer containing a metal oxide is formed on a transparent support to block ultraviolet rays (Japanese Patent Laid-Open No. 4-3).
No. 34895).

However, the above-mentioned method is not practical because of the problem of transparency since a metal oxide layer is used. In addition, there is a problem in adhesion to the organic compound layer, visibility due to a difference in refractive index, and visibility due to reflection on the metal oxide layer, and furthermore, the application of the metal oxide layer takes time and is not practical. Was. Also, a method of providing an ultraviolet absorber layer (JP-A-2000-2000)
However, there are problems such as bleed out (flow out to other layers) of the ultraviolet absorber, sublimation, and elution to alcohol or alkali, and there is a problem in stability as the ultraviolet absorbing layer. was there.

Therefore, it is desired to realize a method for forming an ultraviolet absorbing layer made of an organic material which is excellent in adhesiveness, visibility, and ease of application to a transparent support and an organic compound layer, and which is highly stable. I have.

[0010]

That is, the present invention relates to an organic EL device comprising an anode, a cathode, and a single or a plurality of organic compound layers sandwiched between them on a transparent support.
It is an object of the present invention to provide an organic EL device in which a polymer layer having a pendant ultraviolet absorber is provided to prevent deterioration of an organic compound layer and improve durability.

[0011]

According to a first aspect of the present invention, an anode, a cathode, and one or more organic compound layers sandwiched between the anode and the cathode are formed on a transparent support. In the organic EL device, a polymer layer containing a pendant ultraviolet absorber is provided between the anode and the transparent support.

[0012] The invention according to claim 2 provides an anode on a transparent support,
A cathode, and an organic EL device comprising a single layer or a plurality of organic compound layers sandwiched between the anode and the cathode, wherein a pendant type ultraviolet absorber is provided on the surface of the transparent support opposite to the anode. This is characterized in that a polymer layer is provided.

[0013] The invention according to claim 3 is characterized in that an anode is provided on a transparent support,
In a cathode, and an organic EL device comprising a single layer or a plurality of organic compound layers sandwiched between the anode and the cathode, a pendant type ultraviolet absorber is provided on the surface of the transparent support opposite to the anode. And a protective layer provided on the polymer layer.

According to a fourth aspect of the present invention, in any one of the first to third aspects, a polymer layer containing a pendant type ultraviolet absorber is provided between the anode and the transparent support,
Further, the present invention is characterized in that the same material as the polymer layer is used in combination as a sealant.

According to a fifth aspect of the present invention, in the third aspect of the invention, at least one material of the polymer layer and the protective layer is used in combination as a sealant.

The invention according to claim 6 is characterized in that an anode is provided on a transparent support,
In a cathode, and an organic EL device comprising a single layer or a plurality of organic compound layers sandwiched between the anode and the cathode, a pendant type ultraviolet absorber is provided on the surface of the transparent support opposite to the anode. In addition to providing a polymer layer including the polymer layer, the material of the polymer layer is used in combination as a sealing layer, and a protective layer is provided on each of the polymer layer and the sealing layer. .

The invention according to claim 7 is characterized in that an anode is provided on a transparent support,
In a cathode, and an organic EL device comprising a single layer or a plurality of organic compound layers sandwiched between the anode and the cathode, a polymer layer containing a pendant ultraviolet absorber is provided on the cathode side, Further, a sealing layer is provided.

According to an eighth aspect of the present invention, in any one of the first to seventh aspects, an antioxidant is added to the polymer layer.

In a ninth aspect of the present invention, in the eighth aspect, the antioxidant contains at least a hindered phenol-based antioxidant.

A tenth aspect of the present invention is the invention according to any one of the first to ninth aspects, wherein the transparent support is made of acrylic glass.

According to an eleventh aspect of the present invention, in any one of the first to ninth aspects, the transparent support is a transparent resin film.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the organic EL device according to the present invention will be specifically described with reference to the attached drawings. Note that, in all the drawings for describing the embodiments, portions having similar functions are denoted by the same reference numerals, and repeated description thereof will be omitted.

FIG. 1 is a schematic structural view for explaining one embodiment of the organic EL device of the present invention. In the drawing, 1 is an organic EL device, 2 is a transparent support, 3 is an anode, and 4 is an organic compound. Layer, 5
Is a cathode, and 6 is a polymer layer. A polymer layer 6 having a pendant ultraviolet absorber is formed on the transparent support 2. As the transparent support 2, a transparent glass or a transparent resin film such as polyethylene terephthalate or polyethylene naphthalate is used. A polymer layer 6 having a pendant ultraviolet absorber is formed on one surface of the transparent support 2 using a resin solution or the like. The method for forming the polymer layer 6 having a pendant type ultraviolet absorber is not particularly limited and can be formed by a conventionally known method, for example, a solvent coating method (casting method, spin coating method, blade coating method, dipping method, or the like).
And a method using a wire bar.

The resin forming the polymer layer 6 includes:
From the viewpoint of transparency, it is preferable to use a material in which the refractive index of the resin falls within the range of 0.8 to 1.2 in terms of the refractive index ratio with the transparent support 2. Specific examples of the resin include poly (meth) acrylate resin, polyurethane resin, polyester resin, polyvinyl acetate resin, styrene acrylate resin, polyolefin resin, polystyrene resin,
There are polyvinyl chloride resin, polyether resin, polyamide resin, polycarbonate resin, polyethylene resin, polypropylene resin, polyacrylamide resin and the like.

A crosslinking agent may be used together with the above resin. As specific examples of the crosslinking agent, conventionally known compounds such as an isocyanate compound and an epoxy compound can be used. Specific examples of isocyanate compounds include toluylene diisocyanate, a dimer thereof, diphenylmethane diisocyanate, polymethylene polyphenyl isocyanate, hexamethylene diisocyanate, polyisocyanate, and isocyanate groups in molecules such as derivatives thereof. And a compound having two or more of these. Specific examples of the epoxy compound include ethylene glycol diglycidyl ether, butyl glycidyl ether, polyethylene glycol diglycidyl ether, and epoxy acrylate.

As the ultraviolet absorber pendant to the polymer layer 6 used in the present invention, various known compounds can be used, for example, benzophenone ultraviolet absorber, benzotriazole ultraviolet absorber, benzoate ultraviolet stabilizer. And hindered amine light stabilizers, and at least one kind is used. As the benzophenone-based ultraviolet absorber, various known compounds can be used. For example, 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-n-octoxybenzophenone, 2,2 '-Dihydroxy-4-methoxybenzophenone, 2,2',
4,4′-tetrahydroxybenzophenone, 2,2 ′
-Dihydroxy-4,4'-dimethoxybenzophenone.

Various known compounds can be used as the benzotriazole-based ultraviolet absorber. 2- (5-methyl-2-hydroxyphenyl) benzotriazole,
-(3,5-di-t-butyl-2-hydroxyphenyl) -5-chlorobenzotriazole, 2- (3-t-
Butyl-5-methyl-2-hydroxyphenyl) -5
Chlorobenzotriazole, 2- (3,5-di-t-amyl-2-hydroxyphenyl) benzotriazole,
2- (3,5-di-tert-butyl-2-hydroxyphenyl) benzotriazole, 2- (5-tert-butyl-2-
Hydroxyphenyl) benzotriazole, 2- (5-
t-octyl-2-hydroxyphenyl) benzotriazole, and the like, but are not limited thereto.

As the light stabilizer, a benzoate compound such as 2,4-di-t-butylphenyl-3,5
-Di-t-butyl-4-hydroxybenzoate, 2,
4-di-t-pentylphenyl-3,5-di-t-butyl-4-hydroxybenzoate and the like. Salicylic acid having a hydroxy substituent at the 2-position of the benzene ring,
And its ester skeleton. Examples of the hindered amine light stabilizer include bis (1,2,2,3).
2,6,6-pentamethyl-4-piperidyl) sebacate, bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate, 2- (3,5-di-t-butyl-4)
-Hydroxybenzyl) bis (1,2,2,6,6-pentamethyl-4-piperidyl) 2-n-butylmalonate, 4-benzoyloxy-2,2,6,6-tetramethylpiperidine and the like. However, the present invention is not limited to this as long as it has a piperidyl skeleton.

Further, it has been found that by adding an antioxidant to a polymer layer having a pendant type ultraviolet absorber, deterioration of the element can be further prevented. As the antioxidant used in the present invention, various known compounds can be used. For example, L-ascorbic acid and its ester,
-Ascorbic acid and its esters, α-tocopherol, sesamol and the like. Of course, the present invention is not limited to these, and two or more antioxidants as described above can be used in combination.

Particularly effective antioxidants are hindered phenolic antioxidants, and specific examples thereof include:
2-methylphenol, 2,6-dimethylphenol,
2,4,6-trimethylphenol, 2,6-dimethyl-4-octylphenol, 2-t-butylphenol, 2,6-di-t-butylphenol, 2,4,6-
Tri-t-butylphenol, 2,6-di-t-butyl-4-octylphenol, triethylene glycol bis [3- (3-t-butyl-5-methyl-4-hydroxyphenyl) propionate], 1,6- Hexanediol bis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate], 2,4-bis (n-octylthio) -6- (4-hydroxy-3,5-di-t
-Butylanilino) -1,3,5-triazine, pentaerythrityltetrakis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate], 2,
2-thiodiethylenebis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate], octadecyl-3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate, N , N'-Hexamethylenebis (3,5-di-t-butyl-4-hydroxycinnamide), 3,5-di-t-butyl-4-hydroxybenzylphosphonate diethyl ester,
3,5-trimethyl-2,4,6-tris (3,5-di-t-butyl-4-hydroxybenzyl) benzene, tris (3,5-di-t-butyl-4-hydroxybenzyl) isocyanurate , 2,4-bis [(octylthio) methyl] -o-cresol, N, N'-bis [3-
(3,5-di-t-butyl-4-hydroxyphenyl)
Propionyl] hydrazine and the like.

A transparent conductive substance such as ITO, tin oxide, indium oxide, or zinc aluminum oxide is coated on the polymer layer 6 having a pendant type ultraviolet absorber by vacuum deposition or sputter link method to form the anode 3. . Next, after the anode 3 is etched into a desired pattern, a hole injecting and transporting layer,
An organic compound layer 4 including a light emitting layer, an electron injection transport layer and the like is laminated. Here, the organic compound layer 4 comprises (a) a light emitting layer single layer type, (b) a hole injection / transport layer / light emitting layer type composed of at least one or more layers, and (c) a light emitting layer / at least one layer or more. (D) an electron injection / transport layer type composed of at least one or more of a hole injection / transport layer / light-emitting layer type composed of at least one layer. The laminating method may be formed by vapor deposition, or may be formed by any solvent coating method using a polymer binder as necessary.

As the material for the hole injecting and transporting layer, conventionally known materials are used. For example, the compounds shown in FIG. 2 are exemplified, but not limited thereto. Further, as the light emitting layer material, conventionally known materials are used, and examples thereof include the compounds shown in FIG. 3, but are not limited thereto. As the material for the electron injecting and transporting layer, conventionally known materials are used, and examples thereof include the compounds shown in FIG. 4, but are not limited thereto.

Next, a cathode 5 is formed on the organic compound layer 4. As a material of the cathode 5, a metal having a small work function, for example, Li, Na, Mg, Ca, Sr, Al, Ag, I
A single metal element such as n, Sn, Zn, Zr, or an alloy thereof is used. As a forming method, a co-evaporation by a resistance heating method or an electron beam method, or a sputtering method using an alloy target may be used.

The thickness of the hole injection / transport layer, the thickness of the light-emitting layer, and the thickness of the electron injection / transport layer are not particularly limited, and vary depending on the forming method and the constituents of each layer. Usually about 5 to 500 nm, especially 10 to 300
It is desirable to set it to nm.

In order to prevent oxidation of the organic compound layer 4 and each of the electrodes 3 and 5 as necessary, an oxide such as SiO ₂ , a boride such as MgF ₃ , or GeS or SnS
May be provided with a sealing layer of sulfide or the like. Further, as in the configuration shown in FIG. 5, a polymer layer 6 having a pendant type ultraviolet absorber may be provided on the outer surface on the back electrode (cathode 5) side and used together as a sealing layer. Further, another sealing layer may be further laminated on the polymer layer 6 having a pendant ultraviolet absorber provided on the back electrode side. If necessary, a protective layer may be provided on a polymer layer having a pendant ultraviolet absorber.

As the protective layer, conventionally known hydrophobic resins, ultraviolet curable resins and electron beam curable resins can be used, but the polymer layer 6 having a pendant type ultraviolet absorber can be used.
It is preferable to use the same resin as described above. If necessary, various light fastness assistants, for example, the above-mentioned ultraviolet absorber, fluorescent whitening agent and the like may be used. Specific examples of the fluorescent whitening agent include, for example, a pyrazoline derivative, a coumarin derivative, a stilbene derivative and the like, and these can be used alone or in combination of two or more. Alternatively, a polymer in which the skeleton of each of the above-mentioned light resistance assistants is pendant can be used alone as a binder or in combination with another resin.

In the protective layer and the polymer layer 6 having a pendant type ultraviolet absorber, a filler may be used if necessary. Specific examples include phosphate fibers, potassium titanate, acicular magnesium hydroxide, whiskers, talc, mica, glass flakes, calcium carbonate, plate calcium carbonate, aluminum hydroxide, plate aluminum hydroxide, silica, clay, kaolin, Talc, calcined clay,
Inorganic fillers such as hydrotalcite, crosslinked polystyrene resin particles, urea-formalin copolymer particles, silicone resin particles, crosslinked polymethylmethacrylate resin particles, guanamine-formaldehyde copolymer particles, melamine-formaldehyde copolymer particles, etc. Organic filler.

FIGS. 6 and 7 are schematic structural diagrams for explaining other embodiments of the organic EL device according to the present invention. The configuration shown in FIGS. 6 and 7 is such that an anode 3, an organic compound layer 4, and a cathode 5 are formed in this order on a transparent support 2 opposite to a polymer layer 6 having a pendant type ultraviolet absorber. 6 and 7 correspond to the configurations shown in FIGS. 1 and 5, respectively.

As another embodiment, when an ultraviolet curable resin 8 is used as an adhesive for the sealing layer 7 as shown in FIG. 8, a polymer layer 6 having a pendant ultraviolet absorber is provided on the back electrode side. It can also be used for protection from ultraviolet rays when forming the sealing layer 7.

Example 1 First, 1.1 mm thick acrylic glass was used as a transparent support. Next, Otsuka Chemical's PUVA as a polymer with a pendant type UV absorber
-30M was applied to a glass substrate at 1 μm to form a polymer layer having a pendant ultraviolet absorber. Then, the compound HTM was used as a hole injecting / transporting layer with 1200 °
-1 was 100 °, and the compound EM-1 was 1 as a light emitting layer.
50 °, ETM-5 and ETM-11 as the second and first electron injecting and transporting layers were 200 ° and 2 °, respectively.
Deposited 50 °. Further, a mask is set on the substrate, and M
g: Ag = 10: 1, deposition rate of cathode alloy was 2000
Å formed to produce an organic EL device of 2 × 2 mm.

(Example 2) After forming a polymer layer having a pendant type ultraviolet absorber on a transparent support in Example 1,
ITO, an organic compound layer, and a cathode were formed on the surface opposite to the surface on which the polymer layer was formed in the same manner as in Example 1 to produce an organic EL device.

Example 3 After forming a polymer layer having a pendant ultraviolet absorber in the same manner as in Example 2, silica powder: 10% solution of polyvinyl acetoacetal resin (solvent: MEK): modified silicone polyvinyl Butyral (solid content 12.5%): MEK = 5.5: 5.5: 21:
Example 2 was repeated except that the protective layer solution adjusted at a weight ratio of 68 was pulverized and dispersed in a ball mill to a particle diameter of 0.3 μm to form a 1 μm protective layer on the polymer layer having a pendant ultraviolet absorber. An organic EL device was prepared in the same manner.

(Example 4) Organic EL prepared in Example 1
A polymer layer having a pendant UV absorber was also formed on the back electrode side of the device. (Example 5) A polymer layer having a pendant type ultraviolet absorber was also formed on the back electrode side of the organic EL device manufactured in Example 2. Example 6 A polymer layer having a pendant ultraviolet absorber and a protective layer were also formed on the back electrode side of the organic EL device manufactured in Example 3.

Example 7 Organic EL was prepared in the same manner as in Example 6, except that α-tocophenol was dispersed in the polymer layer having a pendant type ultraviolet absorber in a ratio of 0.3 wt%.
A device was created. Example 8 Pentaerythrityltetrakis [3- (3,5-di-) was added to a polymer layer having a pendant type ultraviolet absorber.
[t-butyl-4-hydroxyphenyl) propionate] was dispersed at a ratio of 0.3 wt% to produce an organic EL device in the same manner as in Example 6. (Example 9) An organic EL device was formed in the same manner as in Example 1 except that the ultraviolet absorbing layer was not formed, and then a polymer layer having a pendant type ultraviolet absorber and a sealing layer were formed to form an organic EL device. Formed.

Comparative Example 1 An organic EL device was formed in the same manner as in Example 1, except that no ultraviolet absorbing layer was formed. Organic EL prepared in Examples 1 to 9 and Comparative Example 1
After confirming that each element has a luminance of 300 cd / m ² or more when driven at a current density of DC 30 mA / cm ² , it is exposed to sunlight on a clear day in the air with the transparent support surface up in the air. A plurality of persons visually checked whether or not light was emitted by passing a current at a plurality of exposure times, and evaluated in five steps. The results are shown in Table 1 below.

[0046]

[Table 1]

From Table 1, it can be seen that an organic EL device having excellent durability can be provided by forming a polymer layer having a pendant ultraviolet absorber of the present invention on the organic EL device.

[0048]

According to the first and second aspects of the present invention, deterioration of an organic compound layer can be prevented by forming a polymer layer having a pendant type ultraviolet absorber, thereby improving the durability of an organic EL device. Can be done. According to the invention of claim 3, by forming a polymer layer having a pendant type ultraviolet absorber and a protective layer on the polymer layer, it is possible to prevent the organic compound layer from deteriorating. Durability can be improved.

According to the fourth aspect of the present invention, by forming a polymer layer having a pendant type ultraviolet absorber and further using the polymer layer as a sealing layer, it is possible to prevent the organic compound layer from deteriorating. Durability can be improved. According to the fifth aspect of the present invention, a polymer layer having a pendant type ultraviolet absorber and a protective layer are formed on the polymer layer, and at least one of the polymer layers is used as a sealing layer to deteriorate the organic compound layer. Can be prevented, and the durability of the organic EL element can be improved.

According to the invention of claim 6, by forming a polymer layer having a pendant type ultraviolet absorber and further using it as a sealing layer, it is possible to prevent the deterioration of the organic compound layer, and the durability of the organic EL device is improved. Performance can be improved.
According to the invention of claim 7, an organic compound layer is formed by forming a polymer layer having a pendant type ultraviolet absorber and further forming an encapsulation layer by using an ultraviolet curable resin in forming the encapsulation layer. Degradation can be prevented, and the production efficiency of the organic EL element can be improved.

According to the eighth aspect of the present invention, by forming a polymer layer having a pendant ultraviolet absorber containing an antioxidant, it is possible to prevent the organic compound layer from deteriorating and to improve the durability of the organic EL device. Can be improved. Claim 9
According to the invention, the deterioration of the organic compound layer can be prevented by forming the polymer layer having the pendant ultraviolet absorber containing the hindered phenolic antioxidant, and the durability of the organic EL device is improved. be able to.

According to the tenth aspect of the present invention, by using acrylic glass for the transparent support, it is possible to provide an organic EL material having high color recognition without blocking visible light. According to the eleventh aspect, by using a transparent resin film for the transparent support, it is possible to provide an organic EL material that does not block visible light and has high color recognition.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram for explaining an embodiment of an organic EL device according to the present invention.

FIG. 2 is a view showing an example of a compound applicable to a hole injection / transport material in the organic EL device of the present invention.

FIG. 3 is a view showing an example of a compound applicable to a light emitting layer material in the organic EL device of the present invention.

FIG. 4 is a view showing an example of a compound applicable to an electron injection / transport layer material in the organic EL device of the present invention.

FIG. 5 is a schematic configuration diagram for explaining another embodiment of the organic EL device according to the present invention.

FIG. 6 is a schematic configuration diagram for explaining still another embodiment of the organic EL device according to the present invention.

FIG. 7 is a schematic configuration diagram for explaining still another embodiment of the organic EL device according to the present invention.

FIG. 8 is a schematic configuration diagram for explaining still another embodiment of the organic EL device according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Organic EL element, 2 ... Transparent support, 3 ... Anode, 4 ... Organic compound layer, 5 ... Cathode, 6 ... Polymer layer, 7 ... Sealing layer.

Claims (11)

[Claims] An organic EL device comprising an anode, a cathode, and a single or a plurality of organic compound layers sandwiched between the anode and the cathode on a transparent support, wherein the anode and the transparent An organic EL device comprising a polymer layer containing a pendant ultraviolet absorber between the support and a support. 2. An organic EL device comprising an anode, a cathode, and a single layer or a plurality of organic compound layers sandwiched between the anode and the cathode on a transparent support, the side opposite to the anode. An organic EL device characterized in that a polymer layer containing a pendant type ultraviolet absorber is provided on the surface of the transparent support. 3. An organic EL device comprising an anode, a cathode, and a single layer or a plurality of organic compound layers sandwiched between the anode and the cathode on a transparent support, the organic EL element being opposite to the anode. An organic EL device, wherein a polymer layer containing a pendant ultraviolet absorber is provided on the surface of the transparent support, and a protective layer is further provided on the polymer layer. 4. A polymer layer containing a pendant type ultraviolet absorber is provided between the anode and the transparent support, and the same material as the polymer layer is used in combination as a sealant. The organic EL device according to any one of claims 1 to 3, wherein 5. The organic EL device according to claim 3, wherein at least one of the polymer layer and the protective layer is used in combination as a sealant. 6. An organic EL device comprising an anode, a cathode, and a single layer or a plurality of organic compound layers sandwiched between the anode and the cathode on a transparent support, the side opposite to the anode. A polymer layer containing a pendant type ultraviolet absorber is provided on the transparent support surface, and the material of the polymer layer is used in combination as a sealing layer, and the protective layer is provided on the polymer layer and the sealing layer, respectively. Organic EL characterized by providing a layer
element. 7. An organic EL device comprising an anode, a cathode, and a single or a plurality of organic compound layers sandwiched between the anode and the cathode on a transparent support, wherein a pendant is provided on the cathode side. An organic EL device comprising: a polymer layer containing a UV-absorbing agent; and a sealing layer. 8. The organic EL device according to claim 1, wherein an antioxidant is added to the polymer layer. 9. The organic EL device according to claim 8, wherein the antioxidant contains at least a hindered phenol-based antioxidant. 10. The organic EL device according to claim 1, wherein the transparent support is made of acrylic glass. 11. The method according to claim 1, wherein the transparent support is a transparent resin film.
3. The organic EL device according to claim 1.