JPH07282977A - Organic electroluminescence(el) element and material for it - Google Patents

Abstract

PURPOSE:To provide an organic EL element which emits a high intensity of light emission and presents excellent stability in iterative service by forming the material of the element from particulates prepared through the gas evaporation method. CONSTITUTION:The material of an organic EL element is formed from particulates prepared through the gas evaporation method. The material should preferably be a light emitting substance or a light emissive aid substance, and also be a carrier conveying substance. At least one layer of the EL element equipped with a light emission layer consisting of an organic compound thin film between a pair of electrodes should preferably be a layer which contains the above-mentioned organic El element material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic electroluminescence (EL) element used for a flat light source or a display.

[0002]

2. Description of the Related Art An EL element using an organic substance is expected to be used as a solid-state light emitting type inexpensive large area full color display element, and many developments have been made. Generally, an EL element is composed of a light emitting layer and a pair of counter electrodes sandwiching the light emitting layer. In light emission, when an electric field is applied between both electrodes, electrons injected from the cathode side are recombined with holes injected from the anode side in the light emitting layer, and the energy level changes from the conduction band to the valence band. This is a phenomenon in which energy is emitted as light when returning.

A conventional organic EL element has a higher driving voltage and lower emission brightness and emission efficiency than an inorganic EL element.
In addition, the deterioration of the characteristics was remarkable and it was not put to practical use.
In recent years, an organic EL in which thin films containing an organic compound having a high fluorescence quantum efficiency that emits light at a low voltage of 10 V or less are laminated
The device has been reported and is of great interest (see Applied Physics Letters, 51, 913, 1987). In this method, the metal chelate complex is added to the phosphor layer,
High-luminance green light emission is obtained by using an amine compound in the hole injection layer, and the luminance is several hundreds at a DC voltage of 6 to 7V.
It has cd / m ² and a maximum luminous efficiency of 1.5 lm / W, which is close to the practical range. However,
The organic EL devices to date have been improved in emission intensity due to the improved structure, but have not yet had sufficient emission brightness. Further, it has a big problem that it is inferior in stability when repeatedly used. Therefore, under the present circumstances, it is desired to develop an organic EL device having a larger emission brightness and excellent stability in repeated use.

When forming an organic EL element by vacuum vapor deposition or sputtering, an expensive apparatus is required and the inside of the apparatus must be kept in high vacuum. Further, in order to obtain an organic EL element having high luminous efficiency, it is necessary to strictly control the film forming conditions of the EL layer. These problems make it difficult to save energy and increase the area of the device. In order to form a thin film by the electric field film formation or the chemical film formation method, it is necessary to strictly control the film formation conditions, and there is a problem that raw materials and devices used are limited.

In addition, since organic compounds usually contain a large amount of impurities such as unreacted products, intermediate products, and inorganic salts, when used as an organic EL device material, these impurities are holes or holes. Since it acts as a trap that hinders electron conduction or a trap that hinders recombination excitation of holes and electrons, it is difficult to obtain good emission brightness and lifetime.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide an organic EL device having a large emission intensity and excellent stability in repeated use. A further object of the present invention is to provide a light emitting material or a light emitting auxiliary material having high luminous efficiency, high brightness and good color purity. A further object of the present invention is to provide a carrier transport material which improves the transport efficiency of electrons or holes, has a high response speed, and can form a highly pure and smooth organic EL layer even on an electrode having a large area.

[0007]

That is, the present invention comprises an organic electroluminescence element material comprising fine particles produced by a gas evaporation method. Further, the present invention relates to the above organic electroluminescence element material, wherein the organic electroluminescence element material is a light emitting material or a light emission auxiliary material. Further, the present invention relates to the above organic electroluminescence element material, wherein the organic electroluminescence element material is a carrier transport material.
Furthermore, the present invention is an organic electroluminescence device comprising a light emitting layer composed of one or a plurality of organic compound thin films between a pair of electrodes, wherein at least one layer is a layer containing the organic electroluminescence device material. And an organic electroluminescence device.

In the gas evaporation method, the organic EL device material is set in a coil-shaped or boat-shaped heating element capable of direct or indirect heating, and Ar and H at low pressure are set.
In this method, a heating element is heated in a container into which a gas such as e, nitrogen, oxygen, or ammonia is introduced to sublimate or evaporate the material. Highly pure organic compound fine particles can be obtained using a gas such as Ar, He, or nitrogen, and oxygen doping can also be performed using an oxygen gas. Evaporation is 10 ^over 5-1
It is carried out under a pressure of 0Toor. The evaporate collides with gas molecules in the container and becomes fine particles, and the size of the fine particles is
It can be controlled by sublimation temperature, gas type, gas flow rate, pressure, etc. The particle size of the fine particles can be controlled within the range of 5 nm to 10 μm, and preferably within the range of 10 nm to 100 nm. The method for producing fine particles by the in-gas evaporation method is described in, for example, JP-A-1-162705, JP-A-2-97501, JP-A-2-131134, JP-A-2-153008, JP-A-2-153807, and JP-A-2-153807. It is described in, for example, Kaihei 3-70738 and Japanese Examined Patent Publication No. 3-52401.

The light-emitting material, light-emission auxiliary material and carrier-transporting material used in the organic EL device of the present invention may be any compound as long as it can be sublimated in a vacuum or an inert gas, such as a dye or a pigment. Any material selected from high molecular compounds such as organic low molecular weight compounds such as, metal complexes, monomers, oligomers, and polymers may be used. Since the organic EL device material of the present invention is fine particles and has few impurities, highly efficient light emission is possible. Further, in the light emitting layer, the hole injecting layer, and the electron injecting layer, known light emitting materials, light emission auxiliary materials, hole transporting materials, and electron transporting materials can be used together, if necessary.

The light emitting material has the ability to emit fluorescence by applying an electric field, and has high fluorescence quantum efficiency, emission color, emission color purity, and the compound itself also has holes and / or
Alternatively, a compound having an electron transporting function and an excellent thin film forming ability is desirable. The light emission auxiliary material is required to have a function of controlling the brightness or the emission color of the organic EL element by the energy transition from the light emitting material. Known light emitting materials or light emission auxiliary materials include anthracene, naphthalene, phenanthrene, pyrene, tetracene, coronene, chrysene, fluorescein, perylene, phthaloperylene, naphthaloperylene, perinone, phthaloperinone, naphthaloperinone, diphenylbutadiene, tetraphenylbutadiene, coumarin, oxadiene. Azole, aldazine, bisbenzoxazoline, bisstyryl, pyrazine, cyclopentadiene, oxine, aminoquinoline, imine, diphenylethylene, vinylanthracene, diaminocarbazole, pyran, thiopyran, polymethine, merocyanine, imidazole chelated oxinoid compound, quinacridone, rubrene, etc. And derivatives thereof, but not limited to.

The hole-transporting material has the ability to transport holes, has an excellent hole-injecting effect on the light-emitting layer or the light-emitting material, and has an electron-injecting layer or electrons for excitons generated in the light-emitting layer. Examples thereof include compounds that prevent migration to transport materials and have excellent thin film forming ability. Specifically, phthalocyanine compounds, naphthalocyanine compounds, porphyrin compounds, oxadiazole, triazole, imidazole, imidazolone, imidazolethione, pyrazoline, pyrazolone, tetrahydroimidazole, oxazole, oxadiazole, hydrazone, acylhydrazone, poly Aryl alkane, stilbene, butadiene,
Benzidine-type triphenylamine, styrylamine-type triphenylamine, diamine-type triphenylamine, and their derivatives, and polyvinylcarbazole,
There are polymer materials such as polysilane and conductive polymers,
It is not limited to these.

The electron-transporting material has the ability to transport electrons, has an excellent electron-injecting effect on the light-emitting layer or the light-emitting material, and has a hole-injecting layer or hole-transporting layer for excitons generated in the light-emitting layer. Examples thereof include compounds that prevent transfer to the material and have excellent thin film forming ability. For example, fluorenone, anthraquinodimethane, diphenoquinone, thiopyran dioxide, oxadiazole, perylene tetracarboxylic acid, fluorenylidene methane, anthraquinodimethane,
Examples include, but are not limited to, anthrone and derivatives thereof. It is also possible to sensitize by adding an electron accepting substance to the hole transporting material and adding an electron donating substance to the electron transporting material.

Each layer constituting the organic EL device of the present invention is
The particles are formed by a physical method such as vacuum deposition or sputtering, a chemical method such as a coating method of applying a coating liquid in which the particles are dispersed together with a resin if necessary, an LB film method, a plasma polymerization method, or the like. The EL layer produced by vacuum vapor deposition or sputtering is usually heated in a low vacuum container of 1 Toor or less to form a thin film on the transparent electrode substrate.
The atmosphere may be vacuum, nitrogen, chlorine, hydrogen, ammonia, Ar, He, or the like. Resins used in chemical methods are known, and polyvinyl butyral, polyacrylate, polycarbonate, polyester, phenoxy, acrylic, acrylic polyol, polyamide, urethane, epoxy, silicone, polystyrene, cellulose, polyvinyl chloride, vinyl chloride It may be a polymer, a phenol, a melamine resin or the like, or a mixture of these resins.
Isocyanate in these resins or the prepared coating liquid,
Melamine or the like may be added to form the organic EL layer by heat curing, UV light or electron beam curing. The film thickness of the organic EL layer is preferably 0.01 to 10 μm.

2 to 4 show the organic EL used in the present invention.
An example of a schematic view of the device is shown. In the figure, the electrode A (17) is generally an anode, and the electrode B (21) is generally a cathode. There is also an organic EL element laminated in a layer structure of (electrode A / light emitting layer / electron injection layer / electrode B), and the organic EL element material of the present invention can be suitably used in any element structure. In the light emitting layer (19) of FIG. 2, if necessary, in addition to the organic EL device material of the present invention, a known light emitting substance, a light emission assisting material, a hole transporting material for carrying carriers and an electron transporting material are also combined. It can also be used. Figure 3
This structure separates the light emitting layer (19) and the hole injection layer (18). With this structure, the hole injection efficiency from the hole injection layer (18) to the light emitting layer (19) is improved, and the light emission luminance and the light emission efficiency can be increased. In this case, for light emission efficiency, the light emitting substance itself used in the light emitting layer has an electron transporting property, or an electron transporting material is added to the light emitting layer to make the light emitting layer have an electron transporting property. desirable.

The structure of FIG. 4 has an electron injection layer (20) in addition to the hole injection layer (18) to improve the efficiency of recombination of holes and electrons in the light emitting layer (19). . in this way,
By making the organic EL element a multi-layered structure, it is possible to prevent a decrease in brightness and life due to quenching. In the devices of FIGS. 3 and 4, if necessary, a luminescent material,
A light emission assisting material, a hole transporting material for carrying carriers, and an electron transporting material can be used in combination. Also,
Each of the hole injecting layer, the light emitting layer, and the electron injecting layer may be formed with a layer structure of two or more layers.

As the conductive material used for the anode of the organic EL device, those having a work function larger than 4 eV are preferable, and carbon, aluminum, vanadium, iron, cobalt, nickel, tungsten, silver, gold and platinum. , Palladium and their alloys, ITO substrates, metal oxides such as tin oxide and indium oxide called NESA substrates, and organic conductive resins such as polythiophene and polypyrrole are used. As the conductive material used for the cathode, one having a work function smaller than 4 eV is suitable, and magnesium, calcium, tin, lead, titanium,
Yttrium, lithium, ruthenium, manganese and the like and alloys thereof are used, but not limited to these. The anode and the cathode may be formed in a layered structure of two or more layers if necessary.

In the organic EL device, at least one of the electrode A represented by (17) and the electrode B represented by (21) should be sufficiently transparent in the emission wavelength region of the device in order to efficiently emit light. desirable. The substrate (16) is also preferably transparent. The transparent electrode is made of the above-mentioned conductive material and is set by a method such as vapor deposition or sputtering so as to ensure a predetermined translucency. It is desirable that the electrode for taking out light emission has a light transmittance of 10% or more. The substrate (16) has mechanical and thermal strength,
It is not limited as long as it is transparent, but examples thereof include transparent resins such as glass substrates, polyethylene plates, polyether sulfone plates and polypropylene plates.

For forming each layer of the organic EL device according to the present invention, any of dry film forming methods such as vacuum deposition and sputtering, and wet film forming methods such as spin coating and dipping can be applied. The film thickness is not particularly limited, but each layer needs to be set to an appropriate film thickness. If the film thickness is too thick, a large applied voltage is required to obtain a constant light output, resulting in poor efficiency. If the film thickness is too thin, pinholes and the like will occur, and even if an electric field is applied, sufficient emission brightness cannot be obtained. Normal film thickness is 5nm to 10μ
A range of m is preferred, but a range of 20 nm to 0.2 μm is more preferred. When the organic EL layer is formed by the fine particles of the present invention, it is necessary to make the average particle diameter of the fine particles smaller than the required film thickness. Since the fine particles of the present invention have an average particle diameter of 50 nm or less, and if necessary, 20 nm or less, they are suitable as the organic EL device of the present invention.

In the case of the wet film forming method, a thin film is formed by using a liquid in which the material forming each layer is dissolved or dispersed in an appropriate solvent such as chloroform, tetrahydrofuran or dioxane, and which solvent is used. May be. Further, in any of the organic layers, an appropriate resin or additive may be used in order to improve the film-forming property and prevent pinholes in the film. Examples of such resins include insulating resins such as polystyrene, polycarbonate, polyarylate, polyester, polyamide, urethane, polysulfone, polymethylmethacrylate, and polymethylacrylate, and poly-
Examples thereof include photoconductive resins such as N-vinylcarbazole and polysilane, and conductive resins such as polythiophene and polypyrrole.

In order to improve the stability of the organic EL device obtained by the present invention against temperature, humidity, atmosphere, etc., a protective layer is provided on the surface of the device or silicon oil or the like is enclosed to protect the entire device. It is also possible to do so. As described above, in the present invention, since the fine particle compound is used for the organic EL element, the luminous efficiency and the luminous brightness can be increased. In addition, this device is extremely stable against heat and current, and furthermore, it can obtain a practically usable light emission brightness at a low driving voltage.
The deterioration, which was a big problem until now, could be greatly reduced. The organic EL element of the present invention can be used as a flat panel display such as a wall-mounted TV or a flat light-emitting body,
It can be applied to light sources such as copiers and printers, light sources such as liquid crystal displays and instruments, display boards, marker lights, etc., and its industrial value is very large. Hereinafter, the present invention will be described in more detail based on examples. The organic EL device of the present invention achieves improvement in luminous efficiency, luminous brightness and long life, and is used together with a light emitting substance, a light emission auxiliary material, a hole transporting material, an electron transporting material, a sensitizer, The resin, the electrode material and the like and the method for manufacturing the element are not limited.

[0021]

Examples of tris (8-hydroxyquinoline) aluminum complex
Method for producing fine particles Sublimation boat (10) in fine particle evaporation chamber (1) shown in FIG.
Then, 20 g of tris (8-hydroxyquinoline) aluminum complex (Alq3) was put into the chamber, and the vapor deposition chamber was placed at 10 ⁻⁵ To.
After exhausting to rr, He gas was introduced to reduce the vacuum degree to 0.
Adjust to 1Toor. 30 Alq3 in sublimation boat
Fine particles were deposited on the recovery film (4) cooled by the cooling plate (3) by heating at 0 ° C. for 30 minutes. From the powder X-ray diffraction pattern and infrared absorption spectrum of the collected fine particles, it was confirmed to be Alq3. 16.6 g of Alq
Three fine particles were obtained, and the average particle size measured from the electron micrograph was 10 nm. Next, by adjusting the introduced amount of He gas, the degree of vacuum at the time of sublimation is changed, and Alq3
Fine particles were created. Table 1 shows the degree of vacuum during sublimation and the average particle size of the prepared fine particles.

Table 1 Fine particle number Vacuum degree during sublimation (Toor) Average particle diameter of fine particles (nm) 1 0.1 10 2 0.5 21 3 1 1 52 4 5 75

Method for producing fine particles of copper phthalocyanine Sublimation boat (10) in fine particle evaporation chamber (1) shown in FIG.
20g of copper phthalocyanine (CuPc) in
After the vapor deposition chamber was evacuated to 10 ^-5 Torr, the vacuum degree was reduced to 0.
Ar gas is introduced so as to be 1Toor. CuPc in the sublimation boat was heated at 350 ° C. for 30 minutes, and fine particles were deposited on the recovery film (4) cooled by the cooling plate (3). A powder X-ray diffraction pattern of the collected fine particles,
It was confirmed from the infrared absorption spectrum that it was CuPc. 15.3 g of CuPc fine particles were obtained, and the average particle size measured from the electron micrograph was 12 nm. Next, by adjusting the amount of Ar gas introduced, the degree of vacuum during sublimation was changed to prepare CuPc fine particles. Table 2 shows the degree of vacuum at the time of sublimation and the average particle size of the prepared fine particles.

Table 2 Fine particle number Vacuum degree during sublimation (Toor) Average particle diameter (nm) of fine particles 5 0.1 12 6 0.5 25 7 7 1 60 8 5 88

Substituted Quinacridone Fine Particles Preparation Method Sublimation boat (10) in fine particle evaporation chamber (1) shown in FIG.
20g of non-substituted quinacridone is placed in the
After exhausting to 0 ^-5 Torr, the degree of vacuum is 0.1Toor
He gas is introduced so that. The unsubstituted quinacridone in the sublimation boat was heated at 300 ° C. for 30 minutes to deposit fine particles on the recovery film (4) cooled by the cooling plate (3). A powder X-ray diffraction pattern of the collected fine particles,
From the infrared absorption spectrum, it was confirmed to be unsubstituted quinacridone. 17.3 g of unsubstituted quinacridone fine particles (fine particle number 9) were obtained, and the average particle diameter measured from the electron micrograph was 15 nm.

Examples 1 to 4 Alq3, N,
N'-diphenyl-N, N '-(3-methylphenyl)-
1,1'-biphenyl-4,4'-diamine, poly-N-
Vinylcarbazole was dissolved and dispersed in chloroform at a ratio of 3: 2: 5 and the film thickness was 1 by spin coating.
A light emitting layer of 00 nm was obtained. An electrode having a film thickness of 150 nm was formed on the alloy by mixing magnesium and silver at a ratio of 10: 1 to obtain an organic EL device shown in FIG. The device exhibited the light emission characteristics shown in Table 3 at a DC voltage of 5V.

Table 3 Examples Alq3 fine particles No. Initial emission luminance (cd / m ² ) 1 1 330 2 2 280 3 3 250 250 4 4 190

Example 5 N, N'-diphenyl-N, N '-(3-methylphenyl) -1,1'-on a washed glass plate with an ITO electrode
Biphenyl-4,4'-diamine was vacuum-deposited to obtain a hole injection layer having a film thickness of 40 nm. Then, Alq3 of the fine particles No. 1 was vacuum-deposited to form a light emitting layer having a film thickness of 30 nm, and an electrode having a film thickness of 100 nm was formed on the light emitting layer having a mixture ratio of magnesium and silver of 10: 1. The organic EL device shown in was obtained. The hole injection layer and the light emitting layer are 10 ⁻⁶ T
Deposition was performed under the conditions of a substrate temperature of room temperature in a vacuum of orr.
The device emitted light of about 530 cd / m ² at a DC voltage of 5 V.

Example 6 N, N'-diphenyl-N, N '-(3-methylphenyl) -1,1'-on a cleaned glass plate with ITO electrodes
Biphenyl-4,4'-diamine was vacuum-deposited to obtain a hole injection layer having a film thickness of 40 nm. Then, a liquid in which Alq3 of fine particle No. 1 is dispersed in chloroform is spin-coated to form a light emitting layer having a film thickness of 30 nm, and an electrode having a film thickness of 100 nm is formed on the alloy by mixing magnesium and silver at a ratio of 10: 1. After formation, the organic EL device shown in FIG. 3 was obtained. The device emitted light of about 620 cd / m ² at a DC voltage of 5V.

Examples 7 to 10 Fine particles Nos. 5 to 5 were placed on a washed glass plate with an ITO electrode.
A liquid in which CuPc of No. 8 was dispersed in tetrahydrofuran was spin-coated to obtain a hole injection layer having a film thickness of 30 nm. Then, a liquid in which Alq3 of the fine particle number 1 is dispersed in chloroform is spin-coated to form a light emitting layer having a film thickness of 30 nm.
An electrode having a film thickness of 100 nm was formed on it by an alloy in which magnesium and silver were mixed at a ratio of 10: 1.
An L element was obtained. The device obtained the light emission characteristics shown in Table 4 at a DC voltage of 5V.

Table 4 Examples CuPc fine particles No. Initial light emission luminance (cd / m ² ) 7 5 930 8 6 900 9 7 790 10 8 735

Example 11 N, N'-diphenyl-N, N '-(3-methylphenyl) -1,1'-on a washed glass plate with ITO electrodes
Biphenyl-4,4'-diamine was vacuum-deposited to obtain a hole injection layer having a film thickness of 40 nm. Then, Alq3 having a particle number of 1 and unsubstituted quinacridone particles having a particle number of 9 are vacuum-deposited at a ratio of 50: 1 to form a light emitting layer having a film thickness of 50 nm, and magnesium and silver are mixed at a ratio of 10: 1. An electrode having a film thickness of 150 nm is formed from the alloy thus prepared, and FIG.
The organic EL device shown in was obtained. The hole injecting layer and the light emitting layer were vapor-deposited in a vacuum of 10 ⁻⁶ Torr at a substrate temperature of room temperature. This element is approximately 1200 cd / m at a DC voltage of 5V.
A luminescence of ² was obtained.

Example 12 CuPc having a particle number of 5 was vacuum-deposited on a washed glass plate with an ITO electrode to obtain a hole injection layer having a film thickness of 30 nm. Then, Alq having a fine particle number of 1 is formed by a vacuum deposition method
3 was formed into a light-emitting layer having a thickness of 20 nm, and then [2- (4-tert-butylphenyl) -5-by a vacuum evaporation method.
An electron injection layer having a thickness of 20 nm of (biphenyl) -1,3,4-oxadiazole] was obtained. An electrode having a film thickness of 150 nm was formed on it with an alloy in which magnesium and silver were mixed at a ratio of 10: 1 to obtain an organic EL device shown in FIG. This device emitted light of about 890 cd / m ² at a DC voltage of 5V.

Comparative Example 1 Alq3 (average particle size 1.
An organic EL device was prepared in the same manner as in Example 1, except that 5 μm) was used. This element has a DC voltage of 5 V
Light emission of 0 cd / m ² was obtained. Comparative Example 2 An organic EL device was produced in the same manner as in Example 7 except that CuPc (average particle size 2 μm) which was not made into fine particles was used for the hole transport layer. This element has a DC voltage of 5V and is approximately 33
Light emission of 0 cd / m ² was obtained. When all the organic EL elements shown in this example were made to continuously emit light at 1 mA / cm ² , a lifetime of 2000 hours or more could be observed. However, the devices of Comparative Examples 1 and 2 have 500
Only a life of less than an hour could be observed. The term "lifetime" as used herein refers to the time required for the organic EL element to continuously emit light until it reaches half the initial emission luminance.

[0035]

According to the in-gas evaporation method, since evaporation molecules are aggregated or united in an inert gas to form fine particles, fine particles with few defects and contamination can be obtained. Further, the method of producing fine particles by the in-gas evaporation method has the advantages that purification and control of the particle size of the produced particles are easy, the particle size distribution of the particle size is sharp, the yield is high, and the purity of the fine particles is high. Therefore, according to the present invention, impurities are not mixed in at the step of forming fine particles, and as a light emitting material, high luminous efficiency, high brightness, good color purity are obtained, and further, electron or hole transport efficiency is improved. In addition, as a carrier transport material, the response speed is high because the electron or hole transport efficiency is improved,
It is possible to form a highly pure and smooth organic EL layer even on an electrode having a large area. Therefore, according to the present invention, it is possible to obtain an organic EL device having higher luminous efficiency, higher brightness, and longer life than those of the conventional ones.

[Brief description of drawings]

FIG. 1 is a schematic view of an in-gas evaporation method apparatus used in Examples.

FIG. 2 is a sectional view showing a schematic structure of an organic EL element used in Examples.

FIG. 3 is a sectional view showing a schematic structure of an organic EL element used in an example.

FIG. 4 is a sectional view showing a schematic structure of an organic EL element used in an example.

[Explanation of symbols]

 1. Fine particle evaporation chamber 2. Recovery roll 3. Cooling plate 4. Film 5. Exhaust port 6. Vacuum gauge 7. Vacuum valve 8. Vacuum pump 9. Lower gas inlet 10. Sublimation boat 11. Sample 12. Evaporative heating power supply 13. Fine particle collection chamber 14. Cooling mesh plate 15. Upper gas inlet 16. Substrate 17. Electrode A 18. Hole injection layer 19. Light emitting layer 20. Electron injection layer 21. Electrode B

Claims (4)

[Claims] 1. An organic electroluminescence device material comprising fine particles produced by an in-gas evaporation method. 2. The organic electroluminescence device material according to claim 1, wherein the organic electroluminescence device material is a light emitting material or a light emission auxiliary material. 3. The organic electroluminescent device material according to claim 1, wherein the organic electroluminescent device material is a carrier transport material. 4. An organic electroluminescence device comprising a light emitting layer composed of one or a plurality of organic compound thin films between a pair of electrodes, wherein at least one layer is provided.
An organic electroluminescence device comprising a layer containing the organic electroluminescence device material according to any one of 1 to 3.