JP2000100560A - Light emitting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high-reliability, high-performance, high-function display element by using a flat substrate as a back plate for sealing. SOLUTION: An ITO layer 3021, an organic layer 3031 and a transparent cathode layer 3041 are formed in sequence on the surface of a transparent substrate 3011. A transparent substrate 3012 having a flat surface is installed against the transparent substrate 3011, and an ITO layer 3022, an organic layer 3032 and a transparent cathode layer 3042 are likewise formed in sequence on the surface of the transparent substrate 3012. A resin 305 containing fine particles 306a and a moisture absorbent 306b with a particle size smaller than that of the fine particles 306a are filled at the peripheral section of the transparent substrate to form an adhesive layer, and the effect on a luminescent element by the infiltration of moisture is suppressed. When the electric field is applied between the ITO layer and the cathode layer, both organic layers luminesce, and luminescence is observed on both sides of this luminescence device respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-luminous display device (EL) using electroluminescence, and more particularly to improving the reliability of an organic EL device. Another object of the present invention is to enhance the visibility of the organic EL element.

[0002]

2. Description of the Related Art With the development of a highly information-oriented multimedia society, the development of flat display devices with low power consumption and high image quality has been activated. Non-emissive liquid crystal display elements have established their position with the feature of low power consumption, and their applications to portable information terminals and the like have been further enhanced.

On the other hand, a self-luminous display element is hardly affected by external light and can be easily recognized indoors.
Electroluminescent displays (EL) have been actively developed to replace T and to realize large-screen display and ultra-high-definition display that are difficult to realize with CRTs.

In 1987, Tan et al. Proposed an organic EL device having a structure in which a hole injection electrode layer, an organic hole transport layer, an organic electron transporting light emitting layer, and an electron injection electrode layer were formed on a substrate. Since then (references: CWTang et al. Appl. Phy
s. Lett. Vol. 51, p. 913 (1987)). In addition to being a flat-type self-luminous element, this element is capable of low power consumption, high luminance, high-speed response, and wide viewing angle display. Due to this, research and development on organic EL displays have been activated. In particular, recently, a character / number display device using an organic EL has been put to practical use, and an image display device has been produced on a trial basis.

[0005] A schematic configuration of a conventional organic EL element is shown with reference to FIG. An anode 602 made of a transparent conductive thin film having a relatively large ionization potential such as indium tin oxide (ITO) and easy to inject holes on a glass substrate 601.
Are formed. Next, an organic layer 6 having a hole transporting layer and an electron transporting light emitting layer sequentially attached to almost the entire surface thereof.
03 is formed. A cathode 604 is formed on the surface of the metal layer having a relatively low work function such as a silver magnesium alloy (AgMg) or the like and is easy to inject electrons.
Further, a substrate (rear plate) 607 having a concave shape on the element side is provided in close contact with the glass substrate 601 and the resin 605, and the inside thereof is filled with an inert gas 608.

The light-emitting layer having an electron-transporting property generally has a lower work function than a metal. However, by using a metal having a low work function such as an AgMg alloy as a cathode, injection and transport of electrons can be relatively performed. Can be easily realized. Further, since the hole transport layer has a relatively large ionization potential, injection and transport of holes can be relatively easily realized by using a material having a large ionization potential such as indium tin oxide (ITO) as the anode.

Therefore, by applying a positive DC voltage to the anode with respect to the cathode, holes are injected from the anode (ITO) 602 into the hole transport layer, and electrons are injected from the cathode 604 to the electron transporting luminescent layer. Is injected, and furthermore, in the light emitting layer near the junction between the hole transporting layer and the electron transporting layer (light emitting layer), these are combined to form excitons and emit light 609.
This light emission is observed through the transparent electrode and the substrate. This light emitting principle is similar to an inorganic compound semiconductor light emitting diode formed of gallium arsenide or the like. By injecting electrons and holes into a compound semiconductor having a PN junction, the electrons and holes are regenerated near the junction. It can correspond to the light emission by the combination. The electron transport layer can be compared with an N-type compound semiconductor, and the hole transport layer can be compared with a P-type compound semiconductor.

Conventionally, the entire light emitting layer element is hermetically sealed by using a back plate having a concave structure, and the back plate is directly bonded to the element substrate by using an ultraviolet curing resin or the like for sealing. Since the concave back plate is used, it is necessary to process the substrate into a concave shape, and it is difficult to reduce the cost. In addition, since the surface is processed into a concave shape, the surface has a fine uneven shape, so the light is emitted on the rear substrate. It was impossible to form the element, and the back substrate could not be used effectively.

Further, in the conventional organic EL device, since external light is reflected by the cathode because metal is used for the cathode,
There is a drawback that light from the rear surface is not transmitted and that the visibility of the display element is affected in a relatively bright environment.

[0010]

As described above, in the conventional organic light-emitting device, since a substrate having a concave structure is used for sealing, it is difficult to reduce the cost, and light emission is also required on the back substrate. It was impossible to form an element or the like, and the back substrate could not be effectively used.

The present invention realizes low cost by using a flat substrate for the back plate for sealing.
It is intended to realize a high-performance and high-performance light-emitting element and to prevent reflection by external light.

[0012]

A first substrate having a flat surface on which a light emitting element of the present invention is formed, and a second substrate having a flat surface on which a thin film light emitting element is formed, respectively. A light emitting device which is disposed so as to face each other with the surface on which the light emitting element is formed being an inner surface, and wherein a peripheral portion of the thin film light emitting element formed on the first and second substrates contains a plurality of fine particles. A light-emitting device, wherein the light-emitting device is surrounded by a contained resin layer, and both light-emitting elements are fixed at a predetermined interval and are tightly sealed.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION (First Embodiment) A structure in which a reflective electrode, an organic layer, and a transmissive electrode are sequentially formed on a second substrate according to the present invention allows the first substrate to be formed from the first substrate side. Light emission from the light emitting layer formed on the first substrate and the light emitting layer formed on the second substrate can be simultaneously observed. In addition, a light-emitting device of a multi-color display can be realized by changing the emission color between the two substrates.

A light emitting device according to a first embodiment of the present invention will be described with reference to FIG. In FIG.
1011 is a glass substrate. On its surface, a transparent electrode (first electrode) 1021 made of indium tin oxide for injecting holes, and triphenyldiamine (TPD [N, N'-bi
s (3-methylphenyl)-(1,1'-biphenyl) -4,4'-diamine])
And the aluminum quinolinol complex (Alq [tr
is (8-hydroxyquino) aluminium]), an organic layer 1031 serving as an electron transporting light emitting layer, and a translucent cathode layer (second electrode) 1041 made of a silver magnesium alloy for injecting electrons are sequentially formed. Have been.

A second substrate 1012 having a flat surface is provided to face the substrate on which these films are formed, and a cathode layer (third layer) made of a silver-magnesium alloy for injecting electrons is provided on the surface thereof. Electrode 1022, rubrene-added aluminum quinolinol complex (Alq [tris (8-hydroxyquin
o) aluminium]) and an electron transporting light-emitting layer of triphenyldiamine (TPD [N, N'-bis (3-methylphenyl)-(1,1'-bi
phenyl) -4,4'-diamine]), an organic layer 1032 serving as a hole transport layer, and a transparent electrode (fourth electrode) 1042 made of indium tin oxide for injecting holes. Have been.

First substrate 1011 and second substrate 1012
Is surrounded by glass beads 106 having a particle size of about 20 microns.
A resin 105 containing zeolite 106b having a particle size smaller than a is set, the substrate is adhered and held by this resin layer, and the light emitting layer element is sealed.

Electric fields are applied between the transparent anode (first electrode) 1021 and the transparent cathode (second electrode) 1041 and between the reflective cathode (third electrode) 1022 and the transparent anode (fourth electrode) 1042. Then, holes and electrons are injected from the respective electrodes into the organic light emitting layer, and light is emitted. And the organic layer 1031
From the transparent anode 1021 and the glass substrate 1011
Green light 1091 transmitting light through the organic layer 1032
From the transparent anode 1042, the transparent cathode 1041,
Organic layer 1031, anode 1021, and glass substrate 1011
Is observed from the first substrate side.

In this embodiment, an organic layer that emits green light is formed on the first substrate, and an organic layer that emits yellow light is formed on the second substrate. However, the organic layer is not limited to this color and is formed on each substrate. By changing the type of the light emitting layer, it is possible to obtain a display of a combination of different colors. Also, they may have the same emission color.

Further, indium tin oxide was used for the first and fourth electrode layers, and magnesium-silver alloy was used for the second and third electrode layers. However, the present invention is not limited to these materials. The fourth electrode layer may be a transparent or translucent conductor, and the third electrode layer may be a light-reflective conductor such as a metal.

In the embodiment, the surfaces of the second electrode layer and the fourth electrode layer are directly exposed to the inert gas. However, the reliability is further improved by covering the surfaces with an insulating layer made of silicon oxide or the like. It is possible to improve.

In this embodiment, the resin contains 20 μm glass particles. However, by using hard glass particles having a size of 5 μm or more and a hygroscopic agent, it is possible to realize a light emitting device having an excellent storage life. Can be. Here again, glass beads are used as the fine particles, but the present invention is not necessarily limited to this. Particularly, if the particles have a certain hardness that can keep the resin layer between the substrates at a certain thickness, such as a glass fiber piece. It is not limited.

Further, zeolite is also used as the moisture absorbent, but it is not limited to this. In the present embodiment, the surface of the cathode layer is directly exposed to the inert gas,
Covering with an insulating layer made of silicon oxide or the like can further improve reliability.

(Second Embodiment) In the first embodiment, an electron-injecting cathode is used in order to use a direct metal electrode as the reflective third electrode. Thereby, it is possible to adopt a general layer configuration.

A light emitting device according to a second embodiment of the present invention will be described with reference to FIG.

In FIG. 2, reference numeral 2011 denotes a glass substrate. On its surface, a transparent electrode (first electrode) 2021 made of indium tin oxide for injecting holes, and triphenyldiamine (TPD [N, N'-bis (3-methylphenyl)-(1,1'-
biphenyl) -4,4'-diamine]) and an aluminum quinolinol complex (Alq [tris (8-hydroxyquino) alumin
organic layer 203 which is an electron-transporting light-emitting layer
1 and a translucent cathode layer (second electrode) 2041 made of a silver-magnesium alloy for injecting electrons are sequentially formed.

A second substrate 2012 having a flat surface is provided facing the substrate on which these films are formed, and a light reflection layer 207 of aluminum and indium oxide for injecting holes are provided on the surface thereof. A transparent electrode (third electrode) 2022 made of tin, triphenyldiamine (TPD [N, N'-bi
s (3-methylphenyl)-(1,1'-biphenyl) -4,4'-diamine])
Aluminum quinolinol complex (Alq [tris (8-hydroxyquino) aluminium]) doped with a hole transport layer composed of rubrene
An organic layer 2032, which is a light emitting layer having an electron transporting property, and a translucent cathode layer (fourth electrode) 2042, which is made of a silver-magnesium alloy for injecting electrons, are sequentially formed.

First substrate 2011 and second substrate 2012
Is surrounded by glass beads 206 having a particle size of about 20 microns.
A resin 205 containing phosphorus pentoxide 206b having a particle size of a and smaller than a is provided, and the substrate is bonded and held by this resin layer and the light emitting layer element is sealed.

When an electric field is applied between the transparent anode (first electrode) 2021 and the transparent cathode (second electrode) 2041, and between the transparent anode (third electrode) 2022 and the transparent cathode (fourth electrode) 2042, Holes and electrons are injected from each electrode into the organic light emitting layer to emit light. Then, "green" light emission 2091 emitted from the organic layer 2031 and transmitted through the transparent anode 2021 and the glass substrate 2011, and a transparent anode 2042, a transparent cathode 2041, an organic layer 2031, the anode 2021, and glass emitted from the organic layer 2032 “Yellow” light emission 2092 transmitting through the substrate 2011 is observed from the first substrate side.

In this embodiment, an organic layer emitting green light is formed on the first substrate and an organic layer emitting yellow light is formed on the second substrate, as in the first embodiment. However, it is also possible to obtain different color combinations by changing the type of light emitting layer formed on each substrate. Also, they may have the same emission color.

Further, indium tin oxide was used for the first and third electrode layers, and a magnesium-silver alloy was used for the second and fourth electrode layers. Any body is acceptable.

(Embodiment 3) In Embodiments 1 and 2, a display device in which display can be observed only from the first substrate side is shown. However, a transparent substrate having a flat surface is used, and all the electrodes are made transparent or transparent. By using a translucent electrode layer, a transmission light-emitting device that can be observed from the second substrate side can be realized.

A light emitting device according to a third embodiment of the present invention will be described with reference to FIG.

In FIG. 3, reference numeral 3011 denotes a glass substrate (first substrate). On its surface, a transparent electrode (first electrode) 302 made of indium tin oxide for injecting holes.
1, triphenyldiamine (TPD [N, N'-bis (3-methyl
phenyl)-(1,1'-biphenyl) -4,4'-diamine]) and an aluminum quinolinol complex (Alq [tris (8-hydro
xyquino) aluminium]), an organic layer 3031 composed of an electron transporting light emitting layer, and a translucent cathode layer (second electrode) 30 composed of a silver magnesium alloy for injecting electrons.
41 are sequentially formed.

A second substrate 3012 having a flat surface is provided facing the substrate on which these films are formed, and a transparent electrode (indium tin oxide) for injecting holes is provided on the surface of the second substrate 3012. Third electrode) 3022, triphenyldiamine (TPD [N, N'-bis (3-methylphenyl)-(1,1'-biphen
yl) -4,4'-diamine]) and an aluminum quinolinol complex (Alq [tris (8-hydro
An organic layer 3032, which is an electron transporting light emitting layer of xyquino) aluminum], and a translucent cathode layer (fourth electrode) 3042 of a silver-magnesium alloy for injecting electrons are sequentially formed.

First substrate 3011 and second substrate 3012
Is surrounded by glass beads 306 having a particle size of about 20 microns.
A resin 305 containing phosphorus pentoxide 306b having a particle size smaller than a is provided, the substrate is adhered and held by this resin layer, and the light emitting layer element is sealed. Anode (first electrode) 3021 and cathode (second electrode) 304
1, and when an electric field is applied between the anode (third electrode) 3022 and the cathode (fourth electrode) 3042, holes and electrons are injected from the respective electrodes into the organic light emitting layer to emit light. The light emitted from both light emitting layers is reflected by the glass substrates 3011 and 3011.
12, green luminescence 3091 and 3091 'and yellow 3092 and 3092' are observed.

According to the present invention, it is possible to observe light emitted in two layers from both sides of a flat light emitting device, and it is possible to realize a display device having a new function which has not existed conventionally.

In this embodiment, an organic layer that emits green light is formed on the first substrate, and an organic layer that emits yellow light is formed on the second substrate. However, the organic layer is not limited to this color and is formed on each substrate. By changing the type of the light emitting layer, it is possible to obtain a display of a combination of different colors. Also, they may have the same emission color.

Further, indium tin oxide was used for the first and third electrode layers, and magnesium silver alloy was used for the second and fourth electrode layers. Any body is acceptable.

In this embodiment, the surfaces of the cathode layers (the second electrode layer and the fourth electrode layer) are directly exposed to the inert gas, but are covered with a transparent insulating layer made of silicon oxide or the like. This can further improve the reliability.

(Embodiment 4) In Embodiment 3, the transmission type light emitting device is shown. However, the contrast can be improved by providing an absorption layer on the back surface of one substrate.

A light emitting device according to a fourth embodiment of the present invention will be described with reference to FIG.

In FIG. 4, reference numeral 4011 denotes a glass substrate (first substrate). On its surface, a transparent electrode (first electrode) 402 made of indium tin oxide for injecting holes.
1, triphenyldiamine (TPD [N, N'-bis (3-methyl
phenyl)-(1,1'-biphenyl) -4,4'-diamine]) and an aluminum quinolinol complex (Alq [tris (8-hydro
xyquino) aluminium]), an organic layer 4031 composed of an electron transporting light emitting layer, and a translucent cathode layer (second electrode) 4 made of a silver magnesium alloy for injecting electrons.
041 are sequentially formed.

A second substrate 4012 having a flat surface is provided opposite to the substrate on which these films are formed, and a transparent substrate made of indium tin oxide for injecting holes is provided on the inner surface thereof. Electrode (third electrode) 4022, triphenyldiamine (TPD [N, N'-bis (3-methylphenyl)-(1,1'-
biphenyl) -4,4'-diamine]) and an aluminum quinolinol complex (Alq [tris (8
-hydroxyquino) aluminium]), an organic layer 4032 which is an electron transporting light emitting layer, and a translucent cathode layer (a fourth electrode) 40 which is a silver magnesium alloy for injecting electrons.
42 are sequentially formed. On the outer surface of the glass substrate 4012, a light absorbing layer 407 made of a carbon thin film is formed.

First substrate 4011 and second substrate 4012
Are surrounded by glass beads 406 having a particle size of about 20 microns.
A resin 405 containing phosphorus pentoxide 406b having a particle size smaller than a is set, the substrate is adhered and held by this resin layer, and the light emitting layer element is sealed.

An anode (first electrode) 4021 and a cathode (second electrode)
Electrode) 4041 and anode (third electrode) 4022
When an electric field is applied between the electrode and the cathode (fourth electrode) 4042, holes and electrons are injected from the respective electrodes into the organic light emitting layer to emit light.

The light emitted from both light emitting layers is
011; green light emission 4091; yellow light emission 409
2 are observed. On the other hand, light transmitted through the glass substrate 4012 is absorbed by the light absorption layer 407. In this case, light that enters the light emitting device from the first substrate side, that is, the observation side, passes through the light emitting device and is absorbed by the light absorbing layer. Is not reflected, and a display with extremely high contrast can be obtained.

Although the light absorbing layer 407 is provided on the back surface of the glass substrate 4012 in this embodiment, the light absorbing layer 407 is not necessarily required to be provided on the back surface, and may be formed between the transparent electrode 4022 on the inner surface side. A light-absorbing material may be used for the second substrate itself.

In this embodiment, an organic layer emitting green light is formed on the first substrate, and an organic layer emitting yellow light is formed on the second substrate. However, the present invention is not limited to this color. It is also possible to obtain a display of a combination of different colors by changing the type of the light emitting layer to be used.

The light emission colors may be the same. Also the first
In addition, indium tin oxide was used as the third electrode layer, and magnesium-silver alloy was used as the second and fourth electrode layers. However, the material is not limited to these materials, and any transparent or translucent conductor may be used.

Also in this embodiment, the surfaces of the cathode layers (the second electrode layer and the fourth electrode layer) are directly exposed to the inert gas, but are covered with a transparent insulating layer made of silicon oxide or the like. This can further improve the reliability.

(Embodiment 5) In Embodiment 4, a light-absorbing back substrate is used. However, a luminous body can be used as the back substrate.

A light emitting device according to a fifth embodiment of the present invention will be described with reference to FIG.

In FIG. 5, reference numeral 5011 denotes a glass substrate (first substrate). On its surface, a transparent electrode (first electrode) 502 made of indium tin oxide for injecting holes.
1, triphenyldiamine (TPD [N, N'-bis (3-methyl
phenyl)-(1,1'-biphenyl) -4,4'-diamine]) and an aluminum quinolinol complex (Alq [tris (8-hydro
xyquino) aluminium]), an organic layer 5031 composed of an electron transporting light-emitting layer, and a translucent cathode layer (second electrode) 5 made of a silver-magnesium alloy for injecting electrons.
041 are sequentially formed.

A second substrate 5012 having a flat surface is provided facing the substrate on which these films are formed, and a transparent substrate made of indium tin oxide for injecting holes is provided on the inner surface thereof. Electrode (third electrode) 5022, triphenyldiamine (TPD [N, N'-bis (3-methylphenyl)-(1,1'-
biphenyl) -4,4'-diamine]) and an aluminum quinolinol complex (Alq [tris (8
-hydroxyquino) aluminium]), an organic layer 5032 which is an electron transporting light emitting layer, and a translucent cathode layer (a fourth electrode) 50 which is made of a silver magnesium alloy for injecting electrons.
42 are sequentially formed.

First substrate 5011 and second substrate 5012
Is surrounded by glass beads 506 having a particle size of about 20 microns.
A resin 505 containing phosphorus pentoxide 506b having a particle size smaller than a is set, and the substrate is adhered and held by this resin layer and the light emitting layer element is sealed.

On the outer surface of the glass substrate 5012, a substrate 5 on which a light emitting element using gallium arsenide is formed is formed.
07 is installed.

An anode (first electrode) 5021 and a cathode (second electrode)
Electrode) 5041, and an anode (third electrode) 5022
When an electric field is applied between the electrode and the cathode (fourth electrode) 5042, holes and electrons are injected from the respective electrodes into the organic light emitting layer to emit light. The light emitted from both light emitting layers is reflected on the glass substrate 5.
011, green light emission 5091 and yellow light emission 509
2 are observed.

On the other hand, light transmitted through the glass substrate 5012 and external light are absorbed by the light emitting element substrate 507, so that a display with high contrast can be obtained.
Since the red light emitted from the LED substrate 507 passes through the organic light emitting device, it can be observed from the first substrate side like green and yellow.

In this embodiment, an organic layer that emits green light is formed on the first substrate, and an organic layer that emits yellow light is formed on the second substrate. However, the present invention is not limited to this color and is formed on each substrate. By changing the type of the light emitting layer, it is possible to obtain a display of a combination of different colors. Also, they may have the same emission color.

It is also possible to use an LED other than the red light emitting LED as the LED. For example, it is possible to realize a full-color display device by emitting blue and green light from an organic layer and combining it with a red LED.

In addition, indium tin oxide was used for the first and third electrode layers, and magnesium-silver alloy was used for the second and fourth electrode layers. Any body is acceptable.

As shown in this embodiment, a multi-color display can be realized with a simple structure according to the present invention, and a display device having a new function which has not existed conventionally can be realized.

[0063]

As described above with reference to the embodiments, in the present invention, an organic light emitting device is formed on the inner surface of a pair of substrates having a flat surface and opposed to each other. By using a relatively simple element configuration using a resin layer containing, a novel self-luminous type flat panel display element that overcomes the drawbacks of the conventional organic electroluminescent element can be realized.

More specifically, higher functionality, lower cost,
It provides a highly reliable organic light-emitting device having a new display function, such as high contrast and high multicolor, which cannot be realized by conventional display devices, and is extremely useful in industry. .

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a light emitting device according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a light emitting device according to a second embodiment of the present invention.

FIG. 3 is a cross-sectional view of a light emitting device according to a third embodiment of the present invention.

FIG. 4 is a sectional view of a light emitting device according to a fourth embodiment of the present invention.

FIG. 5 is a sectional view of a light emitting device according to a fifth embodiment of the present invention.

FIG. 6 is a diagram showing a schematic structure of a conventional organic light emitting device.

[Explanation of symbols]

 1011 Glass substrate 1012 Glass substrate 1021 Transparent electrode 1022 Reflecting electrode 1031 Organic layer 1032 Organic layer 1041 Cathode 1042 Transparent electrode 105 Resin 106a Glass bead 106b Zeolite 107 Back plate 1091 Green emission 1092 Yellow emission

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Masao Fukuyama 3-10-1, Higashi-Mita, Tama-ku, Kawasaki City, Kanagawa Prefecture Inside Matsushita Giken Co., Ltd. (72) Mutsumi Suzuki 3-chome, Higashi-Mita, Tama-ku, Kawasaki City, Kanagawa Prefecture No.10 No.1 Matsushita Giken Co., Ltd. F term (reference) 3K007 AB00 AB04 AB17 AB18 BB05 CA01 CB01 DA00 DB03 EB00 FA01

Claims (8)

[Claims] 1. A thin film having a structure in which a layer including at least a light-transmissive first electrode layer, a first organic light-emitting layer, and a light-transmissive second electrode layer is sequentially formed on a flat substrate surface. A transparent first substrate having a light emitting element formed thereon, and at least a light-reflective third electrode layer, a second organic light-emitting layer, and a light-transmissive fourth electrode layer on a flat substrate surface A second substrate on which a thin-film light-emitting element having a configuration in which layers are sequentially formed is a light-emitting device in which a light-emitting element is formed and a second substrate is opposed to each other with a surface on which the light-emitting element is formed; The peripheral portion of the thin-film light emitting element formed on the first and second substrates is surrounded by a resin layer containing a plurality of fine particles, and the two light emitting elements are fixed at a fixed interval, and A light-emitting device, wherein the light-emitting layer is tightly sealed. 2. The light-emitting device according to claim 1, wherein the light-reflective third electrode formed on the second substrate is formed of a light-reflective layer and a light-transmissive electrode layer. apparatus. 3. A thin film having a structure in which a layer including at least a light-transmissive first electrode layer, a first organic light-emitting layer, and a light-transmissive second electrode layer is sequentially formed on a flat substrate surface. And a layer including at least a light-transmissive third electrode layer, a second organic light-emitting layer, and a light-transmissive fourth electrode layer on a flat substrate surface. A second substrate on which a thin-film light-emitting element having a configuration in which the light-emitting elements are sequentially formed is arranged so as to face each other with the surface on which the light-emitting element is formed being an inner surface; and The peripheral portion of the thin-film light emitting element formed on the first and second substrates is surrounded by a resin layer containing a plurality of fine particles, and the two light emitting elements are fixed at a predetermined interval to emit light. A light-emitting device, wherein a layer is tightly sealed. 4. The method according to claim 1, wherein the second substrate is a luminescent substrate.
4. The light emitting device according to claim 3, wherein the light emitting device is formed close to the surface of the substrate on which the light emitting device is not formed.
A light-emitting device according to claim 1. 5. The method according to claim 1, wherein the plurality of fine particles contained in the resin layer are hard fine particles, the particle diameter of which is substantially constant or less, and the maximum particle diameter thereof is in a range of 5 to 100 microns. The light emitting device according to claim 1. 6. The method according to claim 1, wherein the plurality of fine particles contained in the resin layer are hygroscopic fine particles, whose particle diameters are substantially uniform, and whose average particle diameter is 5 μm or more. Light emitting device according to any one of claims 1 to 4, 7. The fine particles contained in the resin layer are composed of a plurality of hard fine particles having a certain particle size and a hygroscopic medium having a particle size smaller than the fine particles, and the hard fine particles have a particle size of 5 μm or more. The light emitting device according to claim 1, wherein: 8. The light emitting device according to claim 1, wherein the hard fine particles are glass beads or glass fiber pieces.