JP2012221671A - Organic light emitting element, light source device including the same and methods for manufacturing the organic light emitting element and the light source device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an organic light emitting element capable of being manufactured without causing an interruption of membrane production due to alignment.SOLUTION: There are provided: an organic light emitting element which includes a first electrode (2) and a second electrode (3) formed on a substrate (1), an organic layer (6) formed on the first electrode and the second electrode, and an insulating layer (7) formed on the organic layer, while the second electrode faces the first electrode and the insulation layer applies an electric field on the organic layer by polarization within the insulating layer; and a method for manufacturing an organic light emitting element, in which membrane production of an organic layer and an insulating layer are performed without alignment.

Description

  The present invention relates to an organic light emitting device, a light source device using the organic light emitting device, and a method for manufacturing the same.

  Since organic LEDs have features such as thinness, light weight, surface emission, and flexibility, various developments have been made as surface emitting light sources. When the organic LED is used as a surface light source, when the organic LED is used as a large-area organic LED element, if the organic LED element is short-circuited due to the influence of foreign matter or the like, the entire surface is not lit. In order to avoid such problems, Patent Document 1 reports that organic LEDs can be connected in series and in parallel to obtain stable light emission.

JP 2004-234868 A

  In the conventional organic light emitting device, it is necessary to partially form the organic layer and the upper electrode when manufacturing devices connected in series. For this reason, it is necessary to perform alignment (alignment) of the organic layer and the upper electrode before film formation, which causes a problem that manufacturing time is required.

  An object of the present invention is to provide an organic light emitting device capable of suppressing an increase in manufacturing time due to alignment, a light source device using the organic light emitting device, and a manufacturing method thereof.

The features of the present invention for solving the above-described problems are as follows.
(1) a first electrode and a second electrode formed on a substrate, an organic layer formed on the first electrode and the second electrode, and an insulating layer formed on the organic layer The second electrode is opposed to the first electrode, and the insulating layer applies an electric field to the organic layer by polarization in the insulating layer.
(2) The organic light-emitting device according to (1), wherein a plurality of organic light-emitting devices are formed and the plurality of organic light-emitting devices are connected in series.
(3) The organic light emitting device according to (1), wherein a polarization forming electrode is formed on the insulating layer, and the polarization forming electrode forms polarization in the insulating layer.
(4) The organic light emitting device according to (1), wherein the insulating layer includes polyurea, a base layer is formed on the surface of the insulating layer on the side where the organic layer exists, and the base layer is oriented with the insulating layer.
(5) In the above (1), the insulating layer is an organic light emitting element containing an ionic substance.
(6) The organic light emitting device according to (1), wherein an electrode constituting the organic light emitting device at the end of the plurality of organic light emitting devices extends to the end of the organic light emitting device at the end.
(7) The organic light emitting device according to (1), wherein the first electrode and the second electrode are metals.
(8) The organic light emitting device according to (1), wherein the substrate includes a reflective substance.
(9) In the above (1), the first electrode and the second electrode are transparent electrodes, a protective layer is formed on the insulating layer, and the protective layer has a reflective function.
(10) In the above (1), the first electrode and the second electrode are comb-shaped, the width of the comb teeth of the comb-tooth electrode is 10 μm or less, The organic light emitting element whose distance is 10 μm or less.
(11) A light source device including a substrate, the organic light emitting element according to (1), and a driving device that drives the organic light emitting element.
(12) a first electrode and a second electrode formed on the substrate, an organic layer formed on the first electrode and the second electrode, and an insulating layer formed on the organic layer A first organic light emitting device having a second electrode and a third electrode formed on the substrate, an organic layer formed on the second electrode and the third electrode, and an insulating layer. The first electrode, the second electrode, and the third electrode are formed in a comb shape, and the insulating layer is formed into an organic layer by polarization in the insulating layer. An organic light emitting device in which an electric field is applied, the first electrode and the third electrode are insulated, the second electrode is opposed to the first electrode, and the third electrode is opposed to the second electrode .
(13) a first electrode and a second electrode formed on the substrate, an organic layer formed on the first electrode and the second electrode, and an insulating layer formed on the organic layer; The second electrode is opposed to the first electrode, the insulating layer applies an electric field to the organic layer by polarization in the insulating layer, and the first electrode And a method of manufacturing an organic light-emitting element in which an organic layer and an insulating layer are formed without alignment on a substrate on which a second electrode is formed.

  According to the present invention, it is possible to provide an organic light emitting device that can be manufactured without time for alignment, a light source device using the organic light emitting device, and a manufacturing method thereof. Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

It is a top view in one embodiment of an organic light emitting element in the present invention. It is sectional drawing in one Embodiment of the organic light emitting element in this invention. It is a circuit diagram of the light source device shown in FIG. It is a top view in one embodiment of an organic light emitting element in the present invention. It is sectional drawing in one Embodiment of the organic light emitting element in this invention.

  Hereinafter, the present invention will be described in detail with reference to the drawings. The following description shows specific examples of the contents of the present invention, and the present invention is not limited to these descriptions. Various modifications by those skilled in the art are within the scope of the technical idea disclosed in this specification. Changes and modifications are possible. In all the drawings for explaining the present invention, components having the same function are denoted by the same reference numerals, and repeated description thereof may be omitted.

  In the conventional series connection type organic light emitting device, since it is necessary to partially form the organic layer and the upper electrode, it is necessary to perform alignment before film formation.

  FIG. 1 is a top view of an organic light emitting device according to an embodiment of the present invention. The substrate 1 is a resin film. The substrate 1 is not limited to a resin film, and may be a glass substrate or a metal substrate. In the case where the substrate 1 is a resin film, it is necessary that an appropriate moisture permeability reduction process is performed. Further, a film having a reflection function may be formed as the substrate 1. Examples of the film having a reflection function include a laminated film of a metal and a polymer. In that case, a so-called top emission type element can be formed. In the case of a bottom emission type element that extracts light from the substrate 1 side, the substrate 1 may be provided with a light extraction function. In that case, more efficient light emission can be obtained. If it is a top emission type | mold element, an sealing film and a light extraction film | membrane may be used together, and an organic light emitting element can be simplified. In this example, a film having a reflection function was used as the substrate 1.

  In FIG. 1, the first electrode 2 is a cathode. The first electrode 2 is not limited to the cathode, but can also be used as the anode. The second electrode 3 is an anode. The second electrode 3 is formed to face the first electrode 2. The second electrode 3 is not limited to the anode but can also be used as a cathode. The third electrode 4 is formed to face the second electrode 3. The third electrode 4 is insulated from the first electrode 2. The fourth electrode 5 is formed to face the third electrode 4. The fourth electrode 5 is insulated from the second electrode 3. Instead of providing the third electrode 4 and the fourth electrode 5 on the substrate 1, only the first electrode 2 and the second electrode 3 may be provided on the substrate 1, or the number of electrodes may be increased. An organic layer 6 is formed on the comb-like electrode. An insulating layer 7 is formed on the organic layer 6. A protective layer 8 is formed on the insulating layer 7. The top view of FIG. 1 does not accurately represent the stacked structure of the organic light emitting device. In order to make it easy to see the shapes of the components of the organic light emitting device, the laminated structure in FIG. 1 is different from the laminated structure in FIG.

  The first electrode 2, the second electrode 3, the third electrode 4, and the fourth electrode 5 have a comb shape when viewed from the normal direction of the substrate 1. As an electrode structure, it is good also considering the comb-tooth part of a comb-tooth shaped electrode as the shape which put the point electrode and the ring electrode together. Materials that can be used as the first electrode 2, the second electrode 3, the third electrode 4, and the fourth electrode 5 are metals such as Cr, Mo, Al, Ag, AlNi, CrAu, and MgAu. It is a material, or a transparent material such as ITO or IZO. Cr is desirable as an electrode from the viewpoint of being stable and having a work function capable of injecting both holes and electrons. In this example, Cr was used as the electrode material.

  When the electrode has a comb shape, the width of the comb portion (a in FIG. 1) is desirably 10 μm or less. The light emitting portion can be enlarged by narrowing the width of the comb tooth portion to 10 μm or less. The distance (c in FIG. 1) between the tip of the comb teeth and the connecting portion of the comb teeth is preferably 10 μm or less. The light emitting part can be enlarged by narrowing the distance between the tip of the comb tooth part and the connecting part of the comb tooth to 10 μm or less. The first electrode 2, the third electrode 4, the second electrode 3, and the fourth electrode 5 may be integrally formed. The electrodes constituting the organic light emitting element at the end of the organic light emitting elements connected in series are extended to the end of the organic light emitting element as shown in FIG. Can connect. In this example, the electrode width of the comb-like electrode was 10 μm, and the inter-electrode distance between the facing portions was 15 μm.

  In FIG. 2, the organic layer 6 is a layer including a hole transport layer 10, a light emitting layer 11, and an electron transport layer 12. Electrons and holes are injected from the opposing electrode into the organic layer 6 and recombined in the light emitting layer 11 to emit light. The insulating layer 7 is a layer for applying an electric field to the organic layer 6.

  The first electrode 2, the second electrode 3, the organic layer 6, and the insulating layer 7 constitute a first organic light emitting element 101. The second electrode 3, the third electrode 4, the organic layer 6, and the insulating layer 7 constitute a second organic light emitting element 102. The third electrode 4, the fourth electrode 5, the organic layer 6 and the insulating layer 7 constitute a third organic light emitting element 103. The first organic light emitting device 101, the second organic light emitting device 102, and the third organic light emitting device 103 are connected in series. By providing the organic light emitting element with a driving device for driving the organic light emitting element, a light source device is obtained.

  FIG. 2 is a cross-sectional view taken along the line AA ′ of FIG. 1, and is a cross-sectional view of an embodiment of the organic light-emitting device according to the present invention. A hole transport layer 10 is formed on the first electrode 2, the second electrode 3, the third electrode 4, and the fourth electrode 5. When the electrodes are comb-shaped, it is desirable to align the heights of adjacent comb-tooth portions as much as possible. Thereby, the electric field strength between electrodes can be enlarged. Another layer may be interposed between or in contact with the first electrode 2, the second electrode 3, the third electrode 4, the fourth electrode 5, and the hole transport layer 10. Instead of the hole transport layer 10, an electron transport layer 12 described later may be formed. When the electron transport layer 12 is formed, the hole transport layer 10 is formed on the light emitting layer 11. Forming the hole transport layer 10 on the first electrode 2, the second electrode 3, the third electrode 4 and the fourth electrode 5 is preferable in that the range of material selection is widened. In FIG. 2, the hole transport layer 10 is formed so as to cover between the comb teeth of the electrodes. The thickness of the hole transport layer 10 may be made smaller than the height of the comb-tooth portion of the electrode, and the light-emitting layer 11 may cover the space between the comb teeth of the electrode. The hole transport layer 10 is a layer that transports holes from the second electrode 3 to the organic layer 6.

  As the hole transport layer 10, a homopolymer or a copolymer of fluorene, carbazole, arylamine or the like is used. As the copolymer, a material having a thiophene-based or pyrrole-based skeleton can also be used. In addition, a polymer having a skeleton such as fluorene, carbazole, arylamine, thiophene, or pyrrole in the side chain can also be used. The polymer is not limited to polymers, and starburst amine compounds, arylamine compounds, stilbene derivatives, hydrazone derivatives, thiophene derivatives, and the like can also be used. Alternatively, a polymer containing the above material may be used. Further, the present invention is not limited to these materials, and two or more of these materials may be used in combination. In this example, a polymer material was used as the material of the hole transport layer 10. The hole transport layer 10 was formed without the alignment step by a slit coating method in which the printing width can be defined by the nozzle width.

  A light emitting layer 11 is formed on the hole transport layer 10. Another layer may be interposed between and in contact with the hole transport layer 10 and the light emitting layer 11. The light emitting layer 11 is a layer that emits light by recombination of holes and electrons injected from opposing electrodes. As the material of the light emitting layer 11, [Chemical Formula 1] can be used as the host material, [Chemical Formula 2] can be used as the blue dopant, and [Chemical Formula 3] can be used as the red dopant.

  As the host material of the light-emitting layer 11, it is preferable to use a carbazole derivative, a fluorene derivative, an arylsilane derivative, or the like other than [Chemical Formula 1]. In addition, binder polymers such as polycarbonate, polystyrene, acrylic resin, and polyamide can be used together. Further, a polymer material having a skeleton such as carbazole and fluorene can also be used. In order to obtain efficient light emission, it is preferable that the excitation energy of the host is sufficiently larger than the excitation energy of the blue dopant. Excitation energy is measured using the emission spectrum.

  As the blue dopant material of the light emitting layer 11, an Ir complex other than [Chemical Formula 2] is also used. Moreover, various metal complexes, such as Pd, Pt, and Al, and organic materials, such as a styrylamine type | system | group, can also be used.

  As the red dopant material of the light emitting layer 11, Ir complexes other than [Chemical Formula 3] are also used. In addition, various metal complexes such as Pd, Pt, Al, Zn, DCM ([2-[(E) -4- (dimethylamino) styryl] -6-methyl-4H-pyran-4-ylidene] malononitrile), etc. Organic materials can also be used. In this example, [Chemical Formula 1] was used as the host material, [Chemical Formula 2] was used as the blue dopant, and [Chemical Formula 3] was used as the red dopant. The light emitting layer 11 was formed without the alignment process by the slit coat method in which the printing width can be defined by the nozzle width.

  Although the light emitting layer 11 of a present Example is a structure containing a blue dopant and a red dopant, the structure of the light emitting layer 11 is not limited to this structure. The structure containing the blue dopant, the green dopant, and the red dopant has a wider emission spectrum range and can produce an organic light emitting device with excellent color rendering. The light emitting layer 11 may contain only one of a blue dopant, a green dopant, and a red dopant.

  As the green dopant, an Ir complex can be used. In addition, various metal complexes such as Pd, Pt, and Al, and organic materials such as coumarin dyes and quinacridone can also be used.

  A charge transport material such as an electron transport material or a hole transport material can be additionally used for the light emitting layer 11. As the electron transport material, an oxadiazole derivative or the like can be used. A triphenylamine derivative etc. can be used for a hole transport material.

  An electron transport layer 12 is formed on the light emitting layer 11. Another layer may be interposed between the light emitting layer 11 and the electron transport layer 12 or may be in contact therewith. The electron transport layer 12 may be provided as a single layer or a plurality of layers. The electron transport layer 12 is a layer that supplies electrons to the light emitting layer 11. The material of [Chemical Formula 4] can be used for the electron transport layer 12.

  As a material of the electron transport layer 12, in addition to [Chemical Formula 4], for example, bis (2-methyl-8-quinolinolato) -4- (phenylphenolato) aluminum (hereinafter referred to as BAlq), tris (8-quinolinolato) aluminum ( Hereinafter, Alq3), 1,4-Bis (triphenylsilyl) benzene (hereinafter UGH2), oxadiazole derivatives, triazole derivatives, fullerene derivatives, phenanthroline derivatives, quinoline derivatives, and the like can be used. In this example, [Chemical Formula 4] was used as the material of the electron transport layer 12. The electron transport layer 12 was formed by an evaporation method in which an evaporation region was defined by a mask without an alignment process.

  An insulating layer 7 is formed on the electron transport layer 12. Another layer may be interposed between or in contact with the electron transport layer 12 and the insulating layer 7. The insulating layer 7 is a layer that applies an electric field to the organic layer 6 by polarization in the layer. An electric field is applied in the lateral direction between the first electrode 2 and the second electrode 3 formed in a comb shape. Electric charges are unlikely to flow through the light emitting layer 11 only by the electric field in that direction. Due to the presence of the insulating film 7, the electric field generated between the first electrode 2 and the second electrode 3 is distorted, the charge flows into the light emitting layer 11, and the charge is recombined in the light emitting layer 11. .

  The thickness of the insulating layer 7 is about several hundred nm to several μm. As shown in FIG. 1, the step of patterning the insulating film 7 can be omitted by forming the insulating film 7 on the entire surface of the organic layer 6.

  As the insulating layer 7, for example, polyurea of [Chemical Formula 5] can be used. Polyurea is produced by simultaneously depositing diaminofluorene and 4,4'-diphenylmethane diisocyanate. When using polyurea, it is better to insert a thin base film between the insulating layer 7 and the electron transport layer 12. The base film orients the insulating layer 7 made of polyurea. The base film is preferably one in which oxygen appears on the surface of the base film on the side where the insulating film 7 exists. Specific examples include oxides of Mn, V, W, and Si. Polyurea forms polarization due to the orientation occurring in the film. The occurrence of this orientation can be confirmed from measurement of the angle dependency such as infrared absorption.

  As a material for the insulating layer 7 exhibiting polarization, besides polyurea, a polyimide film, a benzimidazole derivative such as Alq3, [Chem. 6], 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP) Phenanthroline derivatives such as 1,3-bis (2- (4-tert-butylphenyl) -1,3,4-oxadiazo-5-yl) benzene (OXD-7) Can do. Polyimide is desirable and polyurea is more desirable in consideration of the fact that the material can be easily oriented to form a large polarization. In this example, [Chemical Formula 5] was used as the material of the insulating layer 7. The insulating layer 7 was formed by an evaporation method in which an evaporation region was defined by a mask without an alignment process.

  A protective layer 8 is formed on the insulating layer 7. The protective layer 8 is a layer for suppressing moisture permeability and protecting the organic light emitting element. As shown in FIG. 1, when the area of the protective layer 8 is made larger than the areas of the organic layer 6 and the insulating layer 7 when viewed from the normal direction of the substrate 1, moisture can be prevented from entering from the in-plane direction of the substrate 1. . As the protective layer 8, a film in which a layer for suppressing moisture permeability is laminated is used. Examples of the laminated film include a plastic film having a structure in which inorganic layers and organic layers are alternately laminated. In this example, a film in which a layer for suppressing moisture permeability was laminated as the protective layer 8 was used.

  The protective layer 8 in this embodiment can be continuously manufactured by sticking to the upper part of the insulating layer 7. A layer having a light extraction function may be added to the protective layer 8. Thereby, more emitted light of the organic light emitting element can be emitted to the outside.

  In the production of the organic light emitting device, the first electrode 2, the second electrode 3, the third electrode 4, and the fourth electrode 5 are formed on the substrate 1 in advance. The first electrode 2, the second electrode 3, the third electrode 4, and the fourth electrode 5 are formed using photolithography. The hole transport layer 10 and the light emitting layer 11 can be manufactured without alignment by a slit coating method in which the printing width can be defined by the nozzle width. The traveling direction of the substrate 1 during film formation is the long side direction of FIG. As long as the film can be continuously formed, the film is not limited to the slit coating method, and the film can also be formed by a roll coating method or a spray method. Further, the electron transport layer 12 and the insulating layer 7 can be formed without alignment by an evaporation method in which an evaporation region is defined by a mask.

  FIG. 3 is a circuit diagram showing an embodiment of the organic light emitting device according to the present invention shown in FIG. The organic light emitting elements connected in parallel are connected in series, so that stable light emission can be obtained. When a voltage was applied between the first electrode 2 and the fourth electrode 5, light emission was observed from the protective layer 8 side, and stable light emission was obtained.

  FIG. 4 is a top view of an embodiment of the organic light emitting device according to the present invention. The substrate 21 is a film. A film having a reflection function was used as the substrate 21.

  The first electrode 22 is a cathode. Cr was used as the first electrode 22. The second electrode 23 is an anode. Cr was used as the second electrode 23. The second electrode 23 is formed to face the first electrode 22. The third electrode 24 is formed to face the second electrode 23. The third electrode 24 is insulated from the first electrode 22. Cr was used as the third electrode 24. The fourth electrode 25 is formed to face the third electrode 24. Cr was used as the fourth electrode 25.

  An organic layer 26 is formed on the electrode. The organic layer 26 is a layer including a hole transport layer 40, a light emitting layer 41, and an electron transport layer 42. Electrons and holes are injected from the opposing electrodes and recombined in the light emitting layer 41 to emit light. An insulating layer 27 is formed on the organic layer 26. The insulating layer 27 is a layer for applying an electric field to the organic layer 26. A polarization forming electrode 28 is formed on the insulating layer 27. The polarization forming electrode 28 is an electrode for forming polarization in the insulating layer 27. The top view of FIG. 4 does not accurately represent the stacked structure of the organic light emitting device. In order to make it easy to see the shapes of the components of the organic light emitting device, the stacked structure in FIG. 4 is different from the stacked structure in FIG.

FIG. 5 is a cross-sectional view taken along the line AA ′ of FIG. 4, and is a cross-sectional view of an embodiment of the organic light-emitting device according to the present invention. A hole transport layer 40 is formed on the first electrode 22, the second electrode 23, the third electrode 24, and the fourth electrode 25. Another layer may be interposed between or in contact with the first electrode 22, the second electrode 23, the third electrode 24, the fourth electrode 25, and the hole transport layer 40. Instead of the hole transport layer 40, an electron transport layer 42 described later may be formed. The hole transport layer 40 is a layer that transports holes from the second electrode 23 to the organic layer 26.
In this example, a polymer material was used as the hole transport layer 40.

  A light emitting layer 41 is formed on the hole transport layer 40. Another layer may be interposed between or in contact with the hole transport layer 40 and the light emitting layer 41. The light emitting layer 41 is a layer that emits light by recombination of holes and electrons injected from opposing electrodes. As the material of the light emitting layer 41, [Chemical Formula 1] was used as the host material, [Chemical Formula 2] was used as the blue dopant, and [Chemical Formula 3] was used as the red dopant.

  An electron transport layer 42 is formed on the light emitting layer 41. Another layer may be interposed between the light emitting layer 41 and the electron transport layer 42 or may be in contact therewith. The electron transport layer 42 is a layer that supplies electrons to the light emitting layer 41. In this example, the material of [Chemical Formula 4] was used for the electron transport layer 42.

An insulating layer 27 is formed on the electron transport layer 42. Another layer may be interposed between or in contact with the electron transport layer 42 and the insulating layer 27. The insulating layer 27 is a layer for insulating the upper polarization forming electrode 28 and the organic layer 26 and applying an electric field to the organic layer 26. In this example, a material obtained by mixing polymethyl methacrylate (PMMA) with an ionic substance of [Chemical Formula 7] was used.
PMMA disperses ionic substances. By including an ionic substance in the insulating layer 27, it is possible to form a polarization in the insulating layer 27 by initially applying a voltage, so that it is not necessary to apply an electric field to the polarization forming electrode 28 every time. As an ionic substance, the chemical formula 7] than the amine compound BF4 @ ^- salts and PF6 @ ^- salts and the like are contemplated. The glass transition temperature of the ionic substance is desirably 100 ° C. or lower. A thin SiOx film was inserted between the insulating layer 27 which is this PMMA dispersion film and the electron transport layer 42.

  IZO was used for the polarization forming electrode 28. In the case of top emission, the polarization forming electrode 28 may be a transparent electrode such as ITO. In the case of bottom emission, the polarization forming electrode 28 may be a reflective electrode such as Cr, Mo, Al, Ag, AlNi, CrAu, MgAu. As shown in FIG. 4, a terminal for applying an electric field outside by making the size of the polarization forming electrode 28 larger than the size of the organic layer 26, the insulating layer 27, and the protective layer 29 in the in-plane long axis direction of the substrate 21. Can be taken.

  A protective layer 29 is formed on the polarization forming electrode 28. The protective layer 29 is a layer for suppressing moisture permeability and protecting the organic light emitting element. A film laminated with a layer for suppressing moisture permeability was used.

  In the production of the organic light emitting device, the first electrode 22, the second electrode 23, the third electrode 24, and the fourth electrode 25 were formed on the substrate 21 in advance by a photolithography method. The hole transport layer 40 and the light emitting layer 41 were produced without alignment by a slit coating method in which the printing width can be defined by the nozzle width. Moreover, the electron carrying layer 42 was formed without alignment by the vapor deposition method which prescribed | regulated the vapor deposition area | region with the mask. The insulating layer 27 was produced by a slit coating method that can define the printing width by the nozzle width. The polarization forming electrode 28 was formed without alignment by a sputtering method in which the film forming area was limited with a mask.

  The organic light emitting device of this example also has a structure in which light emitting diodes connected in parallel are connected in series, so that stable light emission can be obtained. After applying a voltage to the polarization forming electrode 28 to polarize the insulating layer 27 and then applying a voltage between the first electrode 22 and the fourth electrode 25, light emission from the polarization forming electrode 28 side was confirmed. Stable light emission was obtained. Electric field distortion is more reliably formed by the polarization forming electrode 28 than in the first embodiment, and recombination in the light emitting layer 41 is likely to occur.

In Example 3, an organic light emitting device was produced in the same manner as in Example 2 except that an HfO ₂ film was used for the insulating layer 27. The HfO ₂ film was formed by sputtering without using an alignment process.

When a voltage was applied between the first electrode 22 and the fourth electrode 25 while applying an electrode to the polarization forming electrode 28, the obtained organic light emitting device was confirmed to emit light from the polarization forming electrode 28 side, and was stable. Light emission was obtained. By using the HfO ₂ film for the insulating layer 27, the distortion of the electric field necessary for recombination in the light emitting layer is surely applied.

  In Example 4, a film having no reflection function is used for the substrate 1, the first electrode 2, the second electrode 3, the third electrode 4, and the fourth electrode 5 are made of ITO, and the protective layer 8 has a reflection function. It was produced in the same manner as Example 1 except that a film having As a result, light emission was observed from the substrate 1 side, and stable light emission was obtained.

1, 21 Substrate 2, 22 First electrode 3, 23 Second electrode 4, 24 Third electrode 5, 25 Fourth electrode 6, 26 Organic layer 7, 27 Insulating layer 8, 29 Protective layer 10, 40 Hole transport layer 11, 41 Light emitting layer 12, 42 Electron transport layer 28 Polarization forming electrode 101 First organic light emitting element 102 Second organic light emitting element 103 Third organic light emitting element

Claims (13)

A first electrode and a second electrode formed on the substrate;
An organic layer formed on the first electrode and the second electrode;
An organic light emitting device having an insulating layer formed on the organic layer,
The second electrode is opposite the first electrode;
The insulating layer is an organic light emitting device that applies an electric field to the organic layer by polarization in the insulating layer. In claim 1,
A plurality of the organic light emitting elements are formed,
An organic light emitting device in which the plurality of organic light emitting devices are connected in series. In claim 1 or 2,
A polarization forming electrode is formed on the insulating layer;
The polarization forming electrode is an organic light emitting device that forms polarization in the insulating layer. In any one of Claims 1 thru | or 3,
The insulating layer comprises polyurea;
A base layer is formed on the surface of the insulating layer on the side where the organic layer exists,
The underlayer is an organic light-emitting element that orients the insulating layer. In any one of Claims 1 thru | or 4,
The insulating layer is an organic light emitting device including an ionic substance. In claim 2,
An organic light emitting device in which an electrode constituting an organic light emitting device at the end of the plurality of organic light emitting devices extends to an end of the organic light emitting device at the end. In any one of Claims 1 thru | or 6.
The organic light emitting element whose said 1st electrode and said 2nd electrode are metals. In any one of Claims 1 thru | or 7,
An organic light emitting device in which the substrate includes a reflective material. In any one of Claims 1 thru | or 8.
The first electrode and the second electrode are transparent electrodes;
A protective layer is formed on the insulating layer;
The protective layer is an organic light emitting device having a reflective function. In any one of Claims 1 thru | or 9,
The first electrode and the second electrode are comb-like,
The comb tooth width of the comb electrode is 10 μm or less,
An organic light emitting device in which a distance between a tip of the comb teeth and a connecting portion of the comb teeth is 10 μm or less. The substrate;
The organic light emitting device according to any one of claims 1 to 10,
A light source device having a driving device for driving the organic light emitting element. A first electrode and a second electrode formed on the substrate;
An organic layer formed on the first electrode and the second electrode;
A first organic light emitting device having an insulating layer formed on the organic layer;
The second and third electrodes formed on the substrate;
The organic layer formed on the second electrode and the third electrode;
A second organic light emitting device having the insulating layer,
The first electrode, the second electrode, and the third electrode are formed in a comb shape,
The insulating layer applies an electric field to the organic layer by polarization in the insulating layer,
The first electrode and the third electrode are insulated;
The second electrode is opposite the first electrode;
The organic light-emitting element in which the third electrode is opposed to the second electrode. A first electrode and a second electrode formed on the substrate;
An organic layer formed on the first electrode and the second electrode;
An insulating layer formed on the organic layer, comprising:
The second electrode is opposite the first electrode;
The insulating layer applies an electric field to the organic layer by polarization in the insulating layer,
The manufacturing method of the organic light emitting element by which the said organic layer and the said insulating layer are formed into a film without alignment with respect to the said board | substrate with which said 1st electrode and said 2nd electrode were formed.

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