WO2005024853A1 - 透明導電積層体とそれを用いた有機el素子、及びそれらの製造方法 - Google Patents
透明導電積層体とそれを用いた有機el素子、及びそれらの製造方法 Download PDFInfo
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- WO2005024853A1 WO2005024853A1 PCT/JP2004/013030 JP2004013030W WO2005024853A1 WO 2005024853 A1 WO2005024853 A1 WO 2005024853A1 JP 2004013030 W JP2004013030 W JP 2004013030W WO 2005024853 A1 WO2005024853 A1 WO 2005024853A1
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K30/00—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation
- H10K30/80—Constructional details
- H10K30/81—Electrodes
- H10K30/82—Transparent electrodes, e.g. indium tin oxide [ITO] electrodes
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/17—Carrier injection layers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/805—Electrodes
- H10K50/81—Anodes
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/805—Electrodes
- H10K50/81—Anodes
- H10K50/814—Anodes combined with auxiliary electrodes, e.g. ITO layer combined with metal lines
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/80—Manufacture or treatment specially adapted for the organic devices covered by this subclass using temporary substrates
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
- H10K50/846—Passivation; Containers; Encapsulations comprising getter material or desiccants
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/1201—Manufacture or treatment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to a transparent conductive laminate, an organic EL device using the same, and a method for producing the same.
- the present invention relates to a transparent conductive laminate, an organic EL device using the same, and a method for producing the same, and more particularly, to an organic electrification port applied to a light source such as a liquid crystal backlight or a display device such as a display.
- the present invention relates to a transparent conductive laminate used as a constituent material when a luminescence element (hereinafter, referred to as an organic EL element) is manufactured, an organic EL element using the same, and a method for manufacturing the same.
- the electroluminescent element is a self-luminous element, and an inorganic electroluminescent element (hereinafter, referred to as an inorganic EL element) using an inorganic phosphor as a light emitting material. Is used in some of them.
- an inorganic EL element an inorganic electroluminescent element using an inorganic phosphor as a light emitting material.
- the application fields of inorganic EL elements have been limited due to problems such as limited emission color and high operating voltage.
- a conjugated polymer poly-p obtained by polymerization of a precursor soluble in a solvent by application of “dry” high-temperature heat treatment is used.
- phenylene bilen see Patent Document 3
- conjugated polymers that are soluble in solvents and do not require high-temperature heat treatment see Patent Document 2
- a hole injecting layer (hole injecting layer) having a conductive polymer such as a polythiophene derivative between an anode and a light emitting layer (for example, see Patent Document 4).
- the organic light emitting layer and the hole injection layer are formed by applying and drying a polymer light emitting material or a conductive polymer, respectively.
- the transparent conductive film used for the anode electrode is formed of a conductive oxide such as indium tin oxide (ITO) or tin antimony oxide (ATO) by a physical method such as sputtering.
- ITO indium tin oxide
- ATO tin antimony oxide
- the method of obtaining a transparent conductive film by this physical method requires a large-sized apparatus, and furthermore, it is necessary to form a film in a vacuum, which is not preferable in terms of cost. Since substrate heating is required, there are also restrictions such as poor heat resistance and the inability to form a film on a plastic substrate.
- a method for obtaining a transparent conductive film using a coating liquid for forming a transparent conductive film in which ITO fine particles are dispersed as conductive fine particles for example, see Patent Document 5
- a method containing gold or silver or other noble metal as conductive fine particles for example, see Patent Document 6
- the method of forming a transparent conductive film using the transparent conductive film forming coating solution has the following problems when applied to the anode electrode of the organic EL element described above. That is, since the transparent conductive anode electrode obtained by the coating method uses a coating liquid containing fine particles, the surface of the transparent conductive anode electrode necessarily has larger irregularities than the transparent conductive anode electrode obtained by the above-described physical method. Furthermore, in the application and drying process of the coating liquid, a minute amount of the fine particles may be mixed into the coating liquid for forming the transparent conductive film, and coarse particles of the conductive fine particles, coarse particles due to aggregation of the conductive fine particles, coating unevenness, etc. may be generated. Therefore, the formation of remarkable protrusions due to these coating defects was inevitable.
- Patent Document 1 JP-A-59-194393
- Patent Document 2 Japanese Patent Application Laid-Open No. 03-244630
- Patent Document 3 JP-A-10-092577
- Patent Document 4 Japanese Patent Publication No. 2000-514590
- Patent Document 5 JP-A-4-26768
- Patent Document 6 JP-A-2000-268639
- an object of the present invention is to make a transparent conductive film formed by a simple and low-cost coating method capable of forming a film at a low temperature as a transparent conductive anode electrode layer
- An object of the present invention is to provide a transparent conductive laminate, an organic EL device, and a method for manufacturing the same, which are used for manufacturing an organic EL device that does not cause an electric short circuit between the anode electrode layer and the force electrode layer.
- the present inventor has conducted intensive studies to solve the above-mentioned problems.
- a transparent conductive anode electrode layer is formed on a smooth substrate by a coating method
- the other surface of the electrode layer is formed.
- the smooth substrate is bonded to the transparent substrate via an adhesive layer, so that the smooth substrate can be peeled and removed.
- the transparent conductive anode electrode layer itself is an adhesive layer while the peeled surface from which the smooth substrate has been peeled is sufficiently smooth.
- the polymer substrate has no irregularities or protrusions on the smooth peeled surface of the transparent conductive anode electrode layer with the smooth substrate peeled off from the transparent conductive laminate.
- a smooth substrate, a transparent conductive anode electrode layer containing conductive fine particles as a main component and formed on the smooth substrate by a coating method, and A transparent conductive laminate comprising a transparent conductive anode electrode layer and a transparent base material bonded by an adhesive layer, and wherein the smooth substrate is peelable from the transparent conductive anode electrode layer (hereinafter referred to as the first embodiment). May be abbreviated).
- a smooth substrate, a hole injection layer formed on the smooth substrate by a coating method, and a hole injection layer formed on the hole injection layer by a coating method A transparent conductive anode electrode layer, and a transparent base material bonded to the transparent conductive anode electrode layer by an adhesive layer, wherein the smooth substrate is peelable from the hole injection layer (hereinafter referred to as a transparent conductive laminate). , May be abbreviated as the second aspect).
- a metal auxiliary electrode is further applied to a part of the transparent conductive anode electrode layer. Is provided.
- a transparent coat layer formed by a coating method is further provided between the transparent conductive anode electrode layer and the adhesive layer.
- a transparent conductive laminate characterized by comprising:
- the adhesive layer further contains a dehydrating agent, Z, or a deoxidizing agent in addition to the organic resin.
- a transparent conductive laminate is provided.
- the conductive fine particles are noble metal-containing fine particles having an average particle diameter of 11 lOOnm, and the transparent conductive anode electrode layer A transparent conductive laminate characterized by exhibiting a network structure therein is provided.
- the noble metal-containing fine particles are metal fine particles containing gold and Z or silver.
- a body is provided.
- the transparent conductive anode electrode layer contains conductive oxide fine particles as a main component.
- a conductive laminate is provided.
- the conductive oxide fine particles are at least one selected from indium oxide, tin oxide, and zinc oxide zinc oxide.
- a transparent conductive laminate characterized by the following is provided.
- the adhesive layer covers the projections of the conductive fine particles forming the surface of the transparent conductive anode electrode layer.
- a transparent conductive laminate having a sufficient thickness is provided.
- the solvent is applied on a sufficiently peelable and sufficiently smooth substrate to be coated with a solvent.
- a coating liquid for forming a transparent conductive anode electrode layer containing conductive fine particles is applied and dried to form a transparent conductive anode electrode layer, and then the transparent conductive anode electrode layer obtained is transparently coated with an adhesive.
- a solvent is provided on a sufficiently smooth substrate which can be peeled off from the coating layer laminated thereon.
- a coating solution for forming a hole injection layer containing a hole injection material is applied and dried to form a hole injection layer, and then a transparent conductive anode electrode containing conductive fine particles in a solvent is formed on the hole injection layer.
- a coating liquid for forming a layer is applied and dried to form a transparent conductive anode electrode layer, and then a transparent base material is bonded on the obtained transparent conductive anode electrode layer using an adhesive.
- the present invention provides a method for producing a transparent conductive laminate characterized by forming a metal auxiliary electrode by printing and curing a metal auxiliary electrode forming paste.
- a transparent coat layer containing a binder in a solvent is formed thereon.
- a method for producing a transparent conductive laminate comprising applying and drying a coating liquid for forming to form a transparent coat layer, and then bonding a transparent substrate to the transparent coat layer using an adhesive.
- the adhesive is
- a method for producing a transparent conductive laminate characterized by further comprising a dehydrating agent and Z or a deoxidizing agent in addition to the organic resin.
- the conductive fine particles are noble metal-containing fine particles having an average particle size of 11 lOOnm.
- a method for manufacturing an electrical laminate is provided.
- the noble metal-containing fine particles are metal fine particles containing gold and Z or silver.
- a method for manufacturing a laminate is provided.
- the conductive fine particles are conductive oxide fine particles, wherein: Is provided.
- the conductive oxide fine particles are at least one selected from indium oxide, tin oxide, and zinc oxide.
- a method for producing a transparent conductive laminate is provided.
- the transparent conductive anode electrode layer or the hole injection layer obtained by peeling the smooth substrate from the transparent conductive laminate according to any one of the eleventh to tenth aspects of the present invention.
- An organic EL device comprising: a polymer light emitting layer formed on a surface by a coating method; and a force electrode layer provided on the polymer light emitting layer.
- the transparent conductive laminate obtained by the production method according to any one of the eleventh to nineteenth aspects is peeled off and the transparent conductive anode is removed.
- a coating solution for forming a polymer light emitting layer containing a polymer light emitting material or a precursor thereof in a solvent is applied and dried on the release surface of the electrode layer or the hole injection layer to form a polymer light emitting layer.
- the smooth surface of the transparent conductive anode electrode layer in a state where the smooth substrate is peeled off has no irregularities or protrusions. Since the light emitting layer and the power electrode layer can be easily formed, they can be used as a part of the constituent part of the organic EL device.
- the transparent conductive anode electrode layer can be formed by a coating method, the film can be formed easily, at low cost, at low temperature, and the polymer light emitting layer is hardly deteriorated.
- the present invention can provide an organic EL device applicable to a light source such as a light source and a display device such as a display.
- FIG. 1 is a cross-sectional view showing a transparent conductive laminate having a basic structure according to the present invention.
- FIG. 2 is a cross-sectional view schematically showing a projection in an organic EL device having a basic structure according to the present invention.
- FIG. 3 is a cross-sectional view schematically showing a projection in a conventional organic EL device having a basic structure.
- FIG. 4 is a cross-sectional view showing a transparent conductive laminate having another structure according to the present invention.
- FIG. 5 is a cross-sectional view showing a state in which the transparent conductive laminate body of FIG. 4 has a smooth substrate peeled off.
- FIG. 6 is a cross-sectional view showing an organic EL device produced from the transparent conductive laminate of FIG. 4.
- FIG. 7 is a cross-sectional view showing a transparent conductive laminate having still another structure according to the present invention.
- FIG. 8 is a cross-sectional view showing an organic EL device produced from the transparent conductive laminate of FIG. 7.
- FIG. 9 is a sectional view showing an organic EL device having a patterned transparent conductive anode electrode layer according to the present invention.
- FIG. 10 is a cross-sectional view showing a conventional organic EL device having a patterned transparent conductive anode electrode layer.
- FIG. 11 is a cross-sectional view showing an organic EL device according to the present invention in which an auxiliary electrode layer is formed on a transparent conductive anode electrode layer.
- FIG. 12 is a cross-sectional view showing an organic EL device according to the present invention in which an auxiliary electrode layer is formed on a transparent conductive anode electrode layer.
- FIG. 13 shows an organic EL device having a dehydrating agent and a deoxidizing agent in an adhesive layer according to the present invention.
- a transparent conductive laminate of the present invention comprises, in a first aspect, a smooth substrate, a transparent conductive anode electrode layer containing conductive fine particles as a main component, formed on the smooth substrate by a coating method, and
- the smooth substrate includes the conductive anode electrode layer and a transparent substrate bonded by an adhesive layer, and the transparent conductive anode electrode layer is peelable.
- a smooth substrate a hole injection layer formed on the smooth substrate by a coating method, and a hole injection layer formed on the hole injection layer by a coating method
- an organic EL element when an organic EL element is manufactured, as shown in FIG. 3, a transparent conductive layer forming coating solution is applied to a transparent substrate 4 without using a smooth substrate, and dried to form a transparent conductive anode. Electrode layer 2 was formed, and polymer light emitting layer 6 and force electrode layer 7 were laminated thereon. Therefore, when a large protrusion 9 is generated in the transparent conductive anode electrode layer 2 due to coating defects or the like, an electrical short circuit (short) easily occurs with the force electrode layer 7, and the organic EL element emits light. Or the luminous efficiency is remarkably reduced, and dielectric breakdown of the polymer luminescent layer 6 easily occurs.
- a transparent conductive laminate to which a transfer method described in detail below is applied. That is, as shown in FIG. 1, first, in a first embodiment, a coating liquid for forming a transparent conductive anode electrode layer, which will be described in detail later, is applied on a smooth substrate 1 not used for the configuration of the organic EL element. After drying, a transparent conductive anode electrode layer 2 is formed, and a transparent base material 4 used for forming an organic EL device is bonded to the obtained transparent conductive anode electrode layer 2 on an opposite side of the smooth substrate 1 with an adhesive. After that, the adhesive is cured and joined.
- the transparent conductive laminate of the present invention thus obtained has a basic structure as shown in FIG. That is, there is a smooth substrate 1 used as a temporary substrate for forming the transparent conductive anode electrode layer 2 and a transparent conductive anode electrode layer 2 formed on the smooth substrate 1 by a coating method. And a transparent substrate 4 joined to the transparent conductive anode electrode layer 2 by an adhesive layer 3.
- the smooth substrate 1 can be peeled off from the transparent conductive anode electrode layer 2.
- the smooth substrate used in the present invention is not particularly limited as long as it can be peeled off at the interface with the transparent conductive anode electrode layer or the hole injection layer.
- glass plastics such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), and polyethersulfone (PES), and metals such as stainless steel can be used.
- PET film is preferred from the viewpoints of being inexpensive, having high surface flatness, being flexible, and easy to peel off.
- the transparent substrate is a material conventionally used in organic EL devices.
- PET polyethylene terephthalate
- PEN polyethylene naphthalate
- polyether sulfone that transmit visible light
- a plastic film or plate such as (PES) or a glass plate can be used.
- the transparent substrate is subjected to an easy-adhesion treatment to increase the adhesive strength with the adhesive, specifically, a primer treatment, a plasma treatment, a corona discharge treatment, a short-wavelength ultraviolet irradiation treatment, a silicon coupling treatment, and the like. It is preferable to apply.
- the transparent base material a glass plate or a plastic film on which a color filter is formed in advance may be used.
- an organic EL display device can be obtained by using, for example, a white light-emitting material as the polymer light-emitting layer.
- the adhesive use can be made of various types such as an acrylic, urethane, epoxy or the like cold-setting resin, thermosetting resin, ultraviolet-setting resin, or electron beam-setting resin.
- the transparent conductive anode electrode layer or the transparent coating layer can be adhered to the transparent substrate at least at the time of peeling the smooth substrate, and also has an adverse effect on the smooth substrate peelability. It is not limited to these unless otherwise described.
- the amount of the adhesive to be used may be an amount sufficient to cover the protrusion located on the surface of the transparent conductive anode electrode layer.
- the appropriate thickness of the adhesive layer depends on the thickness of the transparent conductive anode electrode layer, but in general, the coating method is particularly limited as long as the thickness is about 0.5 m or more. Not done. If the film thickness is less than 0.5 m, the projection of the transparent conductive anode electrode layer may not be sufficiently covered in some cases. However, even if it exceeds 500 / zm, the function of the adhesive layer does not change, so it is not economical.In addition, depending on the type of adhesive, the adhesive layer contracts greatly and the transparent conductive laminate is distorted. This is not always desirable.
- a significant feature of the transparent conductive laminate of the present invention is that when a smooth substrate is peeled off, its surface is smooth.
- Smooth means that the center line average roughness (Ra) of the peeled surface is lOnm or less, preferably 8 nm or less, more preferably 5 nm or less, and according to the present invention, the type of coating solution, coating conditions, and adhesion.
- Ra center line average roughness
- the center line average roughness (Ra) is measured by an atomic force microscope, and specifically, 1 ⁇ m X l ⁇ m for each of 10 arbitrary locations on the film surface. It was measured in the region of, and the average value was calculated. If the Ra on the peeled surface exceeds lOnm, especially in the case of an organic EL device, the characteristics of the device with a polymer light-emitting layer formed thereon tend to deteriorate, so It may be necessary to add a step of a smoothing process by etching or polishing.
- the adhesive desirably further contains a dehydrating agent and Z or a deoxidizing agent in addition to the organic resin.
- a dehydrating agent and a deoxidizing agent By adding a dehydrating agent and a deoxidizing agent, deterioration of the polymer light emitting layer 6 and the force sword electrode layer 7 can be suppressed.
- the dehydrating agent include silica gel, zeolite, phosphorus pentoxide, sodium sulfate, calcium oxide, barium oxide, and the like.
- the deoxidizing agent include iron, magnesium, calcium, and the like, which easily bond with oxygen. Examples include various metals or organic deoxidizing agents, but are not limited to these, as long as they have the function, even if they are in the form of fine particles or molecularly dissolved.
- the adhesive layer may be arranged at a portion facing the light emitting region of the polymer light emitting layer of the adhesive layer (for example, a portion between light emitting regions when the polymer light emitting layer is patterned).
- the peeled surface of the transparent conductive anode electrode layer 2 exposed by the peeling and removal of the smooth substrate 1 has a flat surface of the smooth substrate 1. It appears as a surface with a high degree of flatness reflecting the surface. Therefore, as shown in FIG. 2, a coating liquid for forming a polymer light emitting layer is applied on the smooth peeled surface of the transparent conductive anode electrode layer 2 and dried to form a polymer light emitting layer 6, and further, the polymer light emitting layer 6 is formed.
- the force electrode layer 7 on the light emitting layer 6 the organic EL device of the present invention described in detail later can be obtained.
- a coating solution for forming a hole injection layer is first applied to a smooth substrate 1 not used for the configuration of the organic EL element, and then dried and dried.
- the injection layer 5 is formed, and then a coating liquid for forming a transparent conductive anode electrode layer is applied and dried to form a transparent conductive anode electrode layer 2.
- a transparent substrate 4 used for the configuration of the organic EL element is attached to the surface on which the conductive anode electrode layer 2 is not formed with an adhesive, and then the adhesive is cured and joined.
- the luminous efficiency and durability of the organic EL element can be improved.
- the coating solution for forming a hole injection layer contains a solvent and a hole injectable substance.
- the hole injectable substance include polysilane, polyaline, polythiophene, and derivatives thereof, for example, a mixture of poly (3,4-ethylenedioxythiophene) and polystyrenesulfonic acid (PE DOT / PSS) (Bayer (Trade name, Baytron), and the like, but are not limited thereto.
- the transparent conductive laminate according to the second embodiment of the present invention thus obtained has a basic structure as shown in FIG. That is, a smooth substrate 1 used as a temporary substrate, a hole injection layer 5 formed on the smooth substrate 1 by a coating method, a transparent conductive anode electrode layer 2 formed in the same manner, and the transparent conductive A transparent substrate 4 joined to the anode electrode layer 2 by an adhesive layer 3 is provided, and the smooth substrate 1 can be peeled off from the transparent conductive anode electrode layer 2.
- the transparent conductive laminate of the present invention may include a transparent coat layer formed by a coating method between the transparent conductive anode electrode layer and the adhesive layer.
- the coating liquid for forming a transparent coat layer is composed of a solvent and a binder.
- the binder may be the same as the binder to be added to the coating solution for forming the transparent conductive anode electrode layer, and an organic and / or inorganic binder can be used, and a binder containing silica sol as a main component is preferable.
- the transparent conductive laminate of the present invention can be stored as it is, and when manufacturing an organic EL device, a smooth substrate is peeled off immediately before forming a polymer light emitting layer. Since removal is sufficient, foreign matter, dust and the like can be effectively prevented from adhering to the peeled surface.
- a step of applying a coating liquid for forming a transparent conductive anode electrode layer containing a solvent and conductive fine particles as main components on a smooth substrate is performed.
- the method includes a step of forming a conductive anode electrode layer and a step of bonding a transparent substrate to the obtained transparent conductive anode electrode layer using an adhesive.
- a substrate having a smooth surface is prepared, and a transparent conductive anode electrode layer mainly containing a solvent and conductive fine particles is formed on the substrate. Apply the coating liquid.
- the coating liquid for forming the transparent conductive anode electrode layer and the coating step using the same will be described later in detail.
- a hole injection layer made of a conductive polymer is provided before forming the transparent conductive anode electrode layer.
- a hole injection layer 5 is formed on a smooth substrate 1 as necessary, and a transparent conductive anode electrode layer 2 is formed.
- a transparent coating layer forming coating liquid may be applied to the transparent conductive anode electrode layer 2 and dried to form the transparent coating layer 8. Thereafter, the transparent substrate 4 is bonded to the surface of the transparent coat layer 8 opposite to the smooth substrate 1 using an adhesive.
- the binder component in the coating liquid for forming the transparent coat layer becomes conductive fine particles of the transparent conductive anode electrode layer 2. It can penetrate into the gaps between them, and can enhance the contact between the conductive fine particles. As a result, the conductivity of the transparent conductive anode electrode layer 2 can be improved, and at the same time, the strength of the transparent conductive anode electrode layer 2 itself can be improved.
- the above-mentioned transparent conductive anode electrode layer 2, hole injection layer 5, and transparent coat layer 8 can be formed by a coating method. That is, a coating liquid for forming a transparent conductive anode electrode layer, a coating liquid for forming a hole injection layer, or a coating liquid for forming a transparent coat layer is applied by spin coating, spray coating, doctor blade coating, roll coating, gravure printing, ink jet printing, Each of the above layers can be formed by applying and drying by a method such as screen printing and, if necessary, by performing a heat treatment at a temperature of, for example, about 50 to 200 ° C.
- the transparent conductive anode electrode layer formed on a smooth substrate is formed, and then bonded to a transparent base material with an adhesive
- the transparent conductive anode electrode layer or the like or on the transparent base material can be used.
- an adhesive to both or both, and drying if necessary, generally apply a linear pressure of about 0.1 to 2.94 x 10 3 N / m using a steel roll or rubber roll, etc. While doing.
- the adhesive is applied by spin coating, spray coating, doctor General-purpose methods such as blade coating, roll coating, gravure printing, and screen printing can be applied. After performing the bonding, the adhesive is cured to complete the bonding.
- thermosetting resin When a thermosetting resin is used, the adhesive is cured by heating. However, when an ultraviolet curable resin is used, the ultraviolet ray is irradiated from the smooth substrate side or the transparent substrate side, so that the adhesive is cured smoothly. Either the substrate or the transparent substrate must be made of a material that transmits ultraviolet light.
- the coating liquid for forming a transparent conductive anode electrode layer used here contains a solvent and conductive fine particles dispersed in the solvent as main components.
- the conductive fine particles include fine particles containing noble metal (A) having an average particle diameter of 11 to 100 nm, or fine and / or irregular (e.g., needle-like or plate-like) conductive oxide having an average particle diameter of 11 to 200 nm.
- Fine particles (B) can be applied.
- the noble metal-containing fine particles (A) are more preferable than the conductive oxide fine particles (B) in view of film properties such as resistance value and transmittance.
- the coating liquid for forming the transparent conductive anode electrode layer using the noble metal-containing fine particles although the transmittance of the obtained film is somewhat reduced, it is possible to lower the film resistance value. It is preferable to give priority to conductivity.
- the average particle diameter of the noble metal-containing fine particles is set to 100 nm, preferably 3 to 20 nm.
- the noble metal-containing fine particles gold or silver metal fine particles or metal fine particles containing gold and silver are preferable.
- the specific resistances of silver, gold, platinum, rhodium, ruthenium, palladium, etc. the specific resistances of platinum, rhodium, ruthenium, and noradium are 10.6, 4.51, 51. 8 / z ⁇ and 1.62, 2.2 / ⁇ Since it is higher than cm, it is considered to be advantageous to use silver or gold metal fine particles or metal fine particles containing gold and silver to form a transparent conductive anode electrode layer with low surface resistance. is there.
- Patent Literature 6 Japanese Patent Application Laid-Open No. 2000-268639 discloses a coating solution for forming a transparent conductive layer using a noble metal-coated silver fine particle having an average particle diameter of 11 lOOnm coated with gold on the surface, and Its manufacturing method has been disclosed.
- the amount of gold coating on the gold-coated silver fine particles is preferably set in the range of 100 to 1900 parts by weight with respect to 100 parts by weight of silver in consideration of the above weather resistance.
- the noble metal-containing fine particles are preferably gold or silver metal fine particles or metal fine particles containing gold and silver because the transparent conductive film formed by these metal fine particles has high transmittance and low transmittance. This is because the work function of this film, which only shows a resistance value, is relatively high, so that holes can be easily injected from the transparent conductive anode electrode layer into the polymer light emitting layer (or hole injection layer).
- the transparent conductive anode electrode layer obtained by applying the coating liquid for forming a transparent conductive anode electrode layer has a structure in which fine holes are introduced into the conductive layer of fine particles containing noble metal, that is, a network structure. Is preferred. When such a network structure is formed, the network portion made of the noble metal-containing fine particles functions as a conductive path, while the holes formed in the network structure function to improve light transmittance.
- a transparent conductive anode electrode layer having low resistance and high transmittance can be obtained.
- a coating liquid for forming a transparent conductive film in which noble metal-containing fine particles (chain agglomerates of noble metal-containing fine particles) that have been previously aggregated in a chain are dispersed is prepared. It is desirable to form a transparent conductive anode electrode layer by applying and drying the same.
- the average main chain length of the chain aggregate is preferably 20 to 500 nm, more preferably 30 to 300 nm.
- the resistance of the obtained transparent conductive anode electrode layer increases, and when the average main chain length exceeds 500 nm, it becomes difficult to filter the coating liquid for forming the transparent conductive anode electrode layer, and at the same time, for forming the transparent conductive anode electrode layer. This is because the storage stability of the coating liquid is poor.
- the ratio between the average main chain length of the chain aggregate and the average particle size of the noble metal-containing fine particles is preferably in the range of 3-100. Outside this range, it becomes difficult to form a transparent conductive anode electrode layer having good conductivity as described above, and it becomes difficult to filter the coating solution for forming the transparent conductive anode electrode layer. This is because the storage stability of the coating solution for forming an electrode layer may deteriorate.
- the average main chain length of the chain aggregate and the average particle size of the noble metal-containing fine particles indicate values for the aggregate observed with a transmission electron microscope (TEM).
- a small amount of a binder may be added to the coating liquid for forming a transparent conductive anode electrode layer.
- the coating liquid for forming a transparent conductive anode electrode layer to which a kneader is added By using the coating liquid for forming a transparent conductive anode electrode layer to which a kneader is added, a single-layer transparent conductive anode electrode layer having high film strength can be obtained.
- the binder organic and Z or inorganic binders can be used.
- the binder can be appropriately selected in consideration of the smooth substrate to be applied, the material of the hole injection layer, the film formation conditions of the transparent conductive anode electrode layer, and the like. it can.
- the organic binder may be selected from thermoplastic resins, thermosetting resins, room temperature-curable resins, ultraviolet-curable resins, electron beam-curable resins, and the like.
- thermoplastic resins include acrylic resin, PET resin, polyolefin resin, vinyl chloride resin, polyvinyl butyral resin, PVP resin, and polyvinyl alcohol resin, and thermosetting resins.
- two-component epoxy resins and urethane resins are used as room-temperature curable resins, and various oligomers, monomers and photoinitiators are used as ultraviolet curable resins.
- Electron beam-curable resins include various oligomers and monomers. But are not limited to these resins.
- Examples of the inorganic binder include a binder mainly composed of silica sol.
- the inorganic binder may include magnesium fluoride fine particles, alumina sol, zircon sol, titar sol, and the like, or silica sol partially modified with an organic functional group.
- Examples of the silica sol include a polymer obtained by hydrolyzing an ortho-alkyl silicate with water or an acid catalyst and hydrolyzing the polymer to promote dehydration-condensation polymerization, or a polymer which has already progressed to the polymerization of 415-mer.
- the alkyl silicate solution can be further subjected to hydrolysis and dehydration-condensation polymerization, and a polymer or the like can be used for IJ.
- the degree of the dehydration-condensation polymerization is determined by coating on a transparent substrate such as a glass substrate or a plastic substrate. Adjust to below the maximum possible viscosity.
- the degree of dehydration polycondensation is not particularly limited as long as it is at or below the above-mentioned upper limit viscosity, but in consideration of film strength, weather resistance and the like, the weight average molecular weight is preferably about 500 to 50,000.
- the alkyl silicate hydrolyzed polymer (silica sol) is heated after coating and drying of the coating liquid for forming the transparent conductive anode electrode layer, the dehydration-condensation polymerization reaction is almost completed, and the hard silicate film (acid sol.) A film mainly composed of silicon iodide).
- the coating liquid for forming a transparent conductive anode electrode layer used in the present invention will be described first, taking as an example the case where the conductive fine particles are gold-coated silver fine particles.
- a colloidal dispersion of monodispersed silver fine particles is prepared by a known method (for example, see the Carey-Lea method: Am. J. Sci., 37, 38, 47 (1889)). Specifically, a mixture of an aqueous solution of iron (II) sulfate and an aqueous solution of sodium citrate is reacted with a silver nitrate aqueous solution, and the precipitate is filtered and washed. A colloidal dispersion of is obtained.
- a reducing agent solution such as hydrazine and a gold salt solution
- a gold salt solution such as hydrazine and a gold salt solution
- a small amount of a dispersant may be added to one or both of the colloidal dispersion liquid of silver fine particles and the gold salt solution.
- it is preferable to lower the electrolyte concentration in the dispersion by a method such as dialysis, electrodialysis, ion exchange, or ultrafiltration. Unless the electrolyte concentration is reduced, colloids generally aggregate with the electrolyte, a phenomenon known as the Schulze-Hardy rule.
- the gold-coated silver fine particle dispersion in which the electrolyte concentration has been reduced in this way is subjected to concentration treatment by a method such as a reduced-pressure evaporator or ultrafiltration to obtain a monodispersed gold-coated silver fine particle dispersion concentrate.
- concentration treatment by a method such as a reduced-pressure evaporator or ultrafiltration to obtain a monodispersed gold-coated silver fine particle dispersion concentrate.
- concentration treatment by a method such as a reduced-pressure evaporator or ultrafiltration to obtain a monodispersed gold-coated silver fine particle dispersion concentrate.
- the hydrazine solution is added little by little while stirring the dispersion concentrate of the monodispersed gold-coated silver fine particles, and the mixture is kept at room temperature for several minutes and several hours, for example, to form the gold-coated silver fine particles in a chain. Aggregate. Thereafter, hydrazine is decomposed by adding a hydrogen peroxide solution to obtain a dispersion (concentration) of chain-like aggregated gold-coated silver fine particles.
- reaction products consist of only water (H 2 O) and nitrogen gas (N 2).
- step 22 Since there is no by-produced impurity ion in step 22, it is an extremely simple and effective method for obtaining chain-like aggregates of gold-coated silver fine particles.
- An organic solvent or the like is added to the obtained chain-like aggregated gold-coated silver fine particle dispersion (concentration) solution, and components such as the concentration of conductive fine particles, the concentration of water, and the concentration of a high-boiling organic solvent are adjusted to form a chain.
- a coating liquid for forming a transparent conductive anode electrode layer containing silver aggregated gold-coated fine silver particles is obtained.
- the amount of chain-like agglomerated gold-coated silver fine particles in the coating solution for forming the transparent conductive anode electrode layer is 0.1 to 10% by weight
- the water content is 1 to 50% by weight
- the organic solvent and other additives are the balance. It is preferable to adjust the components.
- the amount of the chain-like aggregated gold-coated silver fine particles is less than 0.1% by weight, sufficient conductivity cannot be obtained in the transparent conductive anode electrode layer, and when the amount exceeds 5% by weight, the chain-like aggregated gold-coated silver fine particles is unstable. It becomes easy to aggregate.
- the water concentration is less than 1% by weight, that is, when the concentration of the gold-coated silver fine particle dispersion (concentration) solution is increased, the concentration of the chain-like aggregated gold-coated silver fine particles becomes too high as described above. As a result, the chain-like agglomerated gold-coated silver fine particles become unstable and easily aggregate.
- the water concentration exceeds 50% by weight the applicability of the coating liquid for forming the transparent conductive anode electrode layer may be significantly deteriorated.
- a transparent conductive anode layer is formed using conductive oxide fine particles as conductive fine particles.
- conductive oxide fine particles fine particles containing one selected from indium oxide, oxidized tin, and oxidized zinc can be used.
- fine particles of indium tin oxide ITO
- fine particles of indium zinc oxide IZO
- fine particles of indium tungsten oxide IWO
- fine particles of indium titanium oxide ITO
- Indium zirconium oxide particles Indium zirconium oxide particles
- tin antimony oxide ATO
- fluorine-doped tin oxide particles FTO
- Al zinc oxide particles AZO
- gallium-zinc oxide particles GZO
- a coating liquid for forming a transparent conductive anode electrode layer using ITO fine particles is preferable, and it is excellent in transmittance and conductivity of the obtained film. It is.
- the average particle size of the conductive oxide fine particles is 11 to 200 nm, preferably 10 to 50 nm when granular fine particles are used. The reason is that it is transparent if it is less than lnm The production of the coating liquid for forming the conductive layer becomes difficult, and the resistance value of the film increases significantly.
- the average particle diameter of the conductive oxide fine particles indicates a value observed by a transmission electron microscope (TEM).
- the size of the fine particles is 0.1 to 100 m, preferably 0.2 to 10 m.
- the degree is preferred. The reason is that fine particles with a size of less than 0 .: L m are difficult to manufacture themselves, and the resistance value of the film is greatly increased. It is the force that makes it difficult to achieve low resistance values in the region.
- the conductive oxide fine particles are mixed with a dispersant and a solvent, and then a dispersion treatment is performed.
- the dispersing agent include various coupling agents such as a silicon coupling agent, various polymer dispersing agents, and various surfactants such as cation-based, non-on-based, and cationic surfactants. These dispersants are appropriately selected according to the type of the conductive oxide fine particles used and the dispersion treatment method. Further, even if no dispersant is used, a good dispersion state may be obtained depending on the combination of the conductive oxide fine particles and the solvent to be applied and the dispersion method. Since the use of a dispersant may degrade the resistance value and weather resistance of the film, a coating solution for forming a transparent conductive layer that does not use a dispersant is most preferred.
- the dispersion treatment general-purpose methods such as ultrasonic treatment, a homogenizer, a paint shaker, and a bead mill can be applied.
- a solvent or the like is added to the obtained conductive oxide fine particle dispersion (concentration) solution, and the components such as the conductive fine particle concentration and the solvent concentration are adjusted to obtain a transparent conductive material containing the conductive oxide fine particles.
- a coating liquid for forming a layer is obtained.
- the amount of the conductive oxide particles is less than 1% by weight, sufficient conductivity cannot be obtained in the transparent conductive layer. If the amount exceeds 70% by weight, it is difficult to produce a dispersion (concentration) solution of the conductive oxide fine particles. It is a character.
- the specific amount of the conductive oxide fine particles may be appropriately set within the above range according to the coating method to be used.
- the solvent used for the coating liquid for forming the transparent conductive anode electrode layer is not particularly limited, and can be appropriately selected depending on the coating method and the film forming conditions.
- water alcoholic solvents such as methanol (MA), ethanol (EA), 1-propanol (NPA), isopropanol (IPA), butanol, pentanol, benzyl alcohol, diacetone alcohol (DAA); acetone Ketone-based solvents such as ethylene glycol methyl ketone (MEK), methyl propyl ketone, methyl isobutyl ketone (MIBK), cyclohexanone, and isophorone; ethylene glycol monomethyl ether (MCS), ethylene glycol monoethyl ether (ECS), ethylene glycol Isopropyl ether (IPC), propylene glycol methyl ether (PGM), propylene glycol ethyl ether (PE), propylene glycol methyl ether acetate (PGM-AC), propylene glycol ethyl ether acetate (PE-AC), diethylene glycol mono Met Ether, ethylene glycolone monoethylene ether
- MA
- the coating liquid for forming the hole injection layer, the coating liquid for forming the transparent coat layer, and the coating liquid for forming the polymer light emitting layer also impair the solubility or dispersibility of the hole injectable substance, the binder, and the polymer light emitting material.
- the above-mentioned solvent can be used within the range not present.
- the transparent conductive laminate of the present invention produced by the above-described method, at least a layer having a transparent conductive anode electrode layer formed on a smooth substrate by a coating method is simultaneously formed on the transparent substrate on the opposite surface. It is possible to peel off and remove a smooth substrate which is bonded through an adhesive layer and is transparent to the transparent conductive laminate. Accordingly, since the peeled surface of the transparent conductive laminate obtained by peeling and removing the smooth substrate is smooth, an organic EL element of a type using a polymer light emitting material is formed by further forming a polymer light emitting layer or the like on the peeled surface. Can be applied as a member.
- the organic EL device of the present invention after the smooth substrate is peeled off from the transparent conductive laminate thus obtained, a solvent and a high molecular light emitting material or the same are formed on the peeled surface of the transparent conductive anode electrode layer or the hole injection layer.
- a polymer luminescent layer-forming coating solution containing a precursor is applied and dried to form a polymer luminescent layer, and then a force electrode layer is formed on the polymer luminescent layer.
- an organic EL device when manufacturing an organic EL device according to the present invention, first, a smooth substrate is peeled off from the transparent conductive laminate. Thereafter, a coating liquid for forming a polymer light emitting layer is applied on the smooth peeled surface of the transparent conductive anode electrode layer or the hole injection layer after the smooth substrate is peeled off and dried, and the polymer light emitting layer is formed. By forming a cathode electrode layer on the polymer light emitting layer, an organic EL device can be obtained.
- the releasability between the smooth substrate and the transparent conductive anode electrode layer or the hole injection layer depends on the material of the smooth substrate, the coating liquid for forming the transparent conductive anode electrode layer or the coating liquid for forming the hole injection layer.
- the type of adhesive and the components of the coating liquid for forming the transparent coat layer When the adhesive and the coating liquid for forming the transparent coat layer are absorbed into the transparent conductive anode electrode layer, In the case where the transparent conductive anode electrode layer is formed in a pattern, it may reach a smooth substrate surface).
- the smooth substrate is glass, plastic, or metal and the surface is a regular smooth surface, it can be easily peeled off at the interface with the transparent conductive anode electrode layer or hole injection layer formed by the coating method. State.
- a polymer light emitting layer is formed on the above-mentioned release surface.
- the polymer light emitting layer can be formed by a coating method. That is, alternatively, a coating solution for forming a polymer light emitting layer is applied and dried by a method such as spin coating, spray coating, doctor blade coating, lonore coating, gravure printing I ink jet printing, screen printing, and the like. Each layer can be formed by performing a heat treatment at a temperature of about 200 ° C.
- the coating solution for forming a polymer light emitting layer used in the present invention contains a solvent and a polymer light emitting material or a precursor of a polymer light emitting material.
- a polymer light emitting layer can be easily formed simply by applying and drying a coating solution for forming a polymer light emitting layer.
- the polymer light-emitting material include polymers such as poly ⁇ -phenylene-vinylene (PPV), polyphenylene, polyfluorene, and polyvinylcarbazole, and low-molecular fluorescent dyes (for example, coumarin, Perylene, rhodamine, or derivatives thereof), but are not limited thereto as long as they can be dissolved in a solvent and formed by coating.
- a precursor of a polymer light emitting material When a precursor of a polymer light emitting material is used, a coating solution for forming a polymer light emitting layer is applied and dried, and then a high-temperature heat treatment at about 200 ° C. is performed to polymerize the precursor and polymer It is necessary to convert to a luminescent material.
- a precursor of a polymer light-emitting material that is generally used a precursor of poly-p-phenylenevinylene (PPV), which is a polymer light-emitting material, is not limited to this.
- the force source electrode layer formed on the polymer light emitting layer may be a metal having a low work function, such as lithium (Li), K (potassium), or the like, from the viewpoint of electron injection into the polymer light emitting layer.
- a metal having a low work function such as lithium (Li), K (potassium), or the like, from the viewpoint of electron injection into the polymer light emitting layer.
- alkali metals such as Na (sodium), alkaline earth metals such as magnesium (Mg) and calcium (Ca), and aluminum (A1).
- the above-mentioned metal and a metal having good stability such as indium (In) and silver (Ag) are used in combination or laminated.
- the formation of the force source electrode layer can be performed by a known method such as a vacuum evaporation method, a sputtering method, and an ion plating method.
- a thickness of several nm, at which a force such as lithium fluoride (LiF) or magnesium fluoride (MgF) is applied is applied between the force sword electrode layer and the polymer light-emitting layer.
- a structure in which a thin film is sandwiched to a certain extent is also preferable because it can enhance electron injection properties.
- the transparent conductive laminate of the present invention can be applied to an organic EL device having a light emitting layer formed by a coating solution for forming a polymer light emitting layer.
- a coating solution for forming a polymer light emitting layer when applied to an organic EL device having a light emitting layer formed by vapor deposition or the like, short-circuit between electrodes, dielectric breakdown of the light emitting layer, and the like can be effectively suppressed.
- the organic EL device of the present invention is obtained by the above-mentioned manufacturing method using the transparent conductive laminate of the present invention, and is formed by a coating method on a peeled surface on which the surface of a smooth substrate has been transferred.
- the organic EL device having the basic structure shown in Fig. 2 includes a transparent substrate 4, an adhesive layer 3, a transparent conductive anode electrode layer 2 formed by a coating method, a polymer light emitting layer 6, and a force source electrode. Consists of layer 7.
- the projections 9 caused by coating defects such as coarse particles of conductive fine particles, coarse particles due to agglomeration of conductive fine particles, coating unevenness, foreign matter, etc. were generated in the transparent conductive anode electrode layer 2. Even if the protrusion 9 is glued It protrudes toward the layer 3 side and has no effect on the interface between the polymer light emitting layer 6 and the transparent conductive anode electrode layer 2 on the opposite side. Therefore, it is possible to effectively suppress the occurrence of an electrical short circuit (short) with the force source electrode layer 7, the occurrence of dielectric breakdown of the polymer light emitting layer 6, and the like.
- a hole transport layer may be provided between the hole injection layer 5 and the polymer light emitting layer 6, or a hole transport layer may be used as the hole injection layer 5.
- a hole injecting and transporting layer that also serves as a hole transporting layer may be used.
- an electron transport layer may be provided between the force electrode layer 7 and the polymer light emitting layer 6.
- the transparent conductive anode electrode layer may be formed in a predetermined pattern depending on the use.
- the transparent conductive anode electrode layer 2 is formed by applying a predetermined pattern by printing or the like and drying, the transparent conductive anode electrode layer 2 is formed. Is formed on the hole injection layer 6 by a coating method, so that the irregularities formed between the portion where the pattern of the transparent conductive anode electrode layer 2 is formed and the portion where the pattern is not formed are always on the side opposite to the hole injection layer 6. That is, it exists on the adhesive layer 3 side.
- the patterning of the transparent conductive anode electrode layer 2 is caused by the hole injection layer 5 and the polymer light emitting layer 6. It does not affect the film thickness uniformity.
- a metal auxiliary electrode can be formed on a part of the transparent conductive anode electrode layer formed in the above pattern.
- the transparent conductive anode electrode layer 2 of the present invention is applied in a predetermined pattern by printing or the like, and then formed by drying.
- the metal auxiliary electrode 10 can be formed by printing and hardening a metal auxiliary electrode forming paste containing metal fine particles of silver, copper or the like and a solvent as main components (including a binder). As described above, even when the transparent conductive anode electrode layer 2 and the metal auxiliary electrode 10 are each formed in a pattern, the interface between the transparent conductive anode electrode layer 2 and the hole injection layer 5 is formed for the same reason as described above.
- a transparent conductive anode electrode layer 2 has a smooth surface without irregularities, so that it does not affect the thickness uniformity of the hole injection layer 5 and the polymer light emitting layer 6.
- a transparent conductive anode electrode layer 2 is sequentially formed on a transparent substrate 4, so that Irrespective of whether it is formed by a coating method or a physical method such as sputtering, irregularities of the patterned transparent conductive anode electrode layer 2 appear on the side opposite to the transparent substrate 4.
- the transparent conductive anode electrode layer is formed by a coating method, the shape of the edge portion becomes a sharp and sloping inclined surface, so that the difference in the unevenness of the transparent conductive anode electrode layer is further increased.
- the organic EL device of the present invention has a transparent conductive anode electrode layer formed by a simple coating method, but has a transparent conductive anode electrode layer on the force source electrode layer side. Since there are no irregularities or protrusions, no electrical short circuit occurs between the transparent conductive anode electrode layer and the force source electrode layer. Therefore, it is possible to provide an organic EL element which can be manufactured by a simple and low-temperature film-forming coating method, is inexpensive, and hardly causes deterioration of the polymer light emitting layer, and can be a light source such as a liquid crystal knock light or a display device such as a display. It can be applied to
- % indicates “% by weight” excluding% of transmittance and haze value.
- a colloidal dispersion of fine silver particles is prepared by the Carey-Lea method, and the surface of the fine silver particles is coated with gold, desalted, coagulated, and concentrated.
- a coating liquid for forming a transparent conductive anode electrode layer containing gold-coated silver fine particles was obtained.
- the coating liquid for forming the transparent conductive anode electrode layer was observed with a transmission electron microscope, it was found that the Au-coated Ag fine particles had a primary particle size of about 6.5 nm in a continuous chain. A partially branched chain aggregate was formed.
- the main chain length of the chain aggregate (the maximum value of the main chain length in each chain aggregated gold-coated silver fine particle) was 100 to 5 OO nm.
- a PET film manufactured by Teijin Limited, 100 m in thickness
- the above coating solution for forming a transparent conductive anode electrode layer was spin-coated (130 rpm, 100 seconds), and heat-treated at 120 ° C for 10 minutes to obtain a smooth surface.
- a transparent conductive anode electrode layer was formed on the substrate.
- an acrylic UV-curable adhesive (trade name: UV-3701, manufactured by Toa Gosei Co., Ltd.) was applied in an average thickness of 3 m to form a transparent base material.
- the adhesive is cured using a high-pressure mercury lamp, and is made of a smooth substrate Z transparent conductive anode electrode layer Z adhesive layer Z transparent substrate.
- a transparent conductive laminate according to Example 1 was obtained.
- the PET film as a smooth substrate could be easily peeled off at the interface with the transparent conductive anode electrode layer.
- the transparent base material was preheated to 40 ° C on the smooth peeled surface of the transparent conductive anode electrode layer obtained by peeling the smooth substrate (PET film) of the transparent conductive laminate, polymer light emission was performed.
- the coating liquid for forming a layer was spin-coated (150 rpm, 60 seconds) and subjected to vacuum heating at 80 ° C. for 60 minutes to form a polymer light emitting layer.
- the composition of the coating solution for forming the polymer light-emitting layer used was poly [2-methoxy-5- (3,7, -dimethyloctyl)]-1,4-phenylene. Beylene: 0.25%, toluene: 99.75%.
- the flatness of the smooth transparent conductive anode electrode layer was Ra: 5.4 nm.
- the transmittance and the haze value of the above-mentioned transparent conductive anode electrode layer are values of only the transparent conductive anode electrode layer, and are obtained by the following formulas 1 and 2, respectively.
- Transmittance of transparent conductive anode electrode layer [(Transmittance measured for each laminate after forming transparent conductive anode electrode layer) / (Transmittance of (laminate or substrate before forming transparent conductive anode electrode layer)] ] X 100
- Haze value of transparent conductive anode electrode layer (Haze value measured for each laminate after formation of transparent conductive anode electrode layer) (Haze value of laminate or substrate before formation of transparent conductive anode electrode layer)
- the surface resistance of the transparent conductive anode electrode layer was measured using a surface resistance meter Loresta AP (MCP-T400) manufactured by Mitsubishi Iridaku Co., Ltd.
- the haze value and the visible light transmittance were measured using a haze meter (HR-200) manufactured by Murakami Color Research Laboratory.
- the shape and particle size (length) of the chain-like agglomerated gold-coated silver fine particles were evaluated using a transmission electron microscope manufactured by JEOL Ltd.
- Polyethylene dioxythiophene (PEDOT: PSS) dispersion doped with polystyrene sulfonic acid (Bayer, Baytron P-VP-CH8000) was diluted with an organic solvent to prepare a coating solution for forming a hole injection layer.
- the composition of the coating solution for forming the hole injection layer is as follows: Neutron p-VP-CH8000: 20.0%, ⁇ -glycidoxypropyltrimethoxysilane: 1.0%, ⁇ -methyl-2-pyrrolidone: 1.5%, PGM : 5.0%, isopropyl alcohol (IP A): 72.5%.
- a PET film (100 / zm, manufactured by Teijin Limited) as a smooth substrate was preheated to 40 ° C, and the coating solution for forming a hole injection layer was spin-coated thereon (150 rpm, 100 rpm). For 10 seconds) and heat-treated at 120 ° C. for 10 minutes to form a hole injection layer.
- the same coating liquid for forming a transparent conductive anode electrode layer as in Example 1 was spin-coated (130 rpm, 100 seconds) on the above-mentioned hole injection layer. Heating was performed at 10 ° C. for 10 minutes to form a transparent conductive anode electrode layer.
- the film properties of this transparent conductive anode layer were measured in the same manner as in Example 1, and as a result, the visible light transmittance was 75%, the haze value was 0.2%, and the surface resistance value was 200 ⁇ . .
- An epoxy adhesive (trade name: C1064, manufactured by Testa Corporation) was applied on the transparent conductive anode electrode layer in an average thickness of 10 m, and then a glass substrate (soda lime) was used as a transparent substrate. (Glass, thickness lmm), and the adhesive is cured to form a smooth substrate Z hole injection layer Z transparent conductive anode electrode layer Z adhesive layer Z transparent substrate A conductive laminate was obtained. In this transparent conductive laminate, the PET film as a smooth substrate could be easily peeled off at the adhesive interface with the hole injection layer.
- the transparent substrate was preheated to 40 ° C on the smooth peeled surface of the hole injection layer obtained by peeling the smooth substrate (PET film) from the transparent conductive laminate, and then heated in Example 1.
- the same polymer luminescent layer forming coating solution as in Example 1 was spin-coated (150 rpm, 60 seconds), and further subjected to vacuum heating at 80 ° C. for 60 minutes to form a polymer luminescent layer.
- the flatness of the smooth transparent conductive anode electrode layer was Ra: 5.6 nm.
- the coating liquid for forming a transparent coat layer mainly composed of a silica sol solution was further spun.
- the coating was performed (130 rpm, 80 seconds) and heat-treated at 120 ° C. for 10 minutes to form a transparent coat layer.
- ⁇ -mercaptopropyltrimethoxysilane 0.005%
- PGM 10.0%
- DAA 5.0%
- EA 79.9%.
- the silica sol solution was prepared using 19.6 parts of methyl silicate 51 (trade name, manufactured by Colcoat Co., Ltd.), 57.8 parts of ethanol, 7.9 parts of 1% nitric acid aqueous solution, and 14.7 parts of pure water to form a silica sol. (Oxidation silicon)
- the solid concentration is 10% and the weight average molecular weight is 1400.
- An epoxy adhesive (trade name: C1064, manufactured by Testa Co., Ltd.) was applied on the transparent coat layer in an average thickness of 10 m, and then a glass substrate (soda-lime glass, (Mm), and the adhesive is cured to form a smooth substrate Z hole injection layer Z transparent conductive anode electrode layer Z transparent coat layer Z adhesive layer Z transparent substrate A transparent conductive laminate was obtained.
- the PET film as a smooth substrate could be easily peeled off at the interface with the hole injection layer.
- the substrate (PET film) having a smooth transparent conductive laminate was peeled off, and a polymer light emitting layer and a two-layer force electrode layer made of Ca and Ag were formed in the same manner as in Example 2.
- an organic EL device according to Example 3 was obtained.
- a DC voltage of 15 V was applied between the transparent conductive anode electrode layer and the force electrode layer of the organic EL device (anode: +, force force:-)
- orange light emission was confirmed.
- the flatness of the smooth transparent conductive anode electrode layer was Ra: 5.6 nm.
- the coating solution for forming the transparent conductive anode electrode layer used in Example 1 was spin-coated (130 rpm, 100 seconds) on a glass substrate (soda-lime glass, thickness lmm) preheated to 40 ° C, and heated at 120 ° C. Heat treatment was performed for 10 minutes to form a transparent conductive anode electrode layer on the glass substrate.
- Example 1 After the glass substrate on which the transparent conductive anode electrode layer was formed was preheated to 40 ° C., the same coating solution for forming a polymer light emitting layer as in Example 1 was spin-coated on the transparent conductive anode electrode layer (150 rpm, (For 60 seconds), followed by vacuum heating at 80 ° C. for 60 minutes to form a polymer light emitting layer. On this polymer light emitting layer, two force electrode layers (size: lcm ⁇ 1.5 cm) each having a Ca and Ag force were formed in the same manner as in Example 1, and a comparison was made without using a smooth substrate and an adhesive. An organic EL device according to Example 1 was obtained.
- ITO fine particles with an average particle size of 30 nm (trade name: SUFP-HX, manufactured by Sumitomo Metal Mining Co., Ltd.) with 40 g of isophorone as a solvent, a dispersion treatment is performed, and ITO fine particles with an average dispersed particle size of l lOnm are obtained.
- a dispersed coating liquid for forming a transparent conductive anode electrode layer was obtained.
- a PET film manufactured by Teijin Limited, 100 m in thickness
- the above-mentioned coating solution for forming a transparent conductive anode electrode layer was coated on this smooth substrate by wire bar coating (wire diameter: 0.3 mm) and heat-treated at 40 ° C for 15 minutes and at 120 ° C for 30 minutes.
- a transparent conductive anode electrode layer (thickness: 3 m) composed of ITO fine particles was formed on a smooth substrate.
- the film properties of the transparent conductive anode electrode layer were as follows: visible light transmittance: 80.3%, haze value: 3.2%, and surface resistance value: 4500 ⁇ .
- An acrylic UV-curable adhesive (trade name: UV-3701, manufactured by Toa Gosei Co., Ltd.) was applied on the obtained transparent conductive anode electrode layer in an average thickness of 3 m to form a transparent base material. After bonding to a glass substrate (soda-lime glass, thickness lmm), the adhesive is cured using a high-pressure mercury lamp, and is made of a smooth substrate Z transparent conductive anode electrode layer Z adhesive layer Z transparent substrate A transparent conductive laminate according to Example 4 was obtained. In this transparent conductive laminate, the PET film as a smooth substrate could be easily peeled off at the interface with the transparent conductive anode electrode layer.
- a smooth substrate obtained by peeling a smooth substrate (PET film) from the transparent conductive laminate was obtained.
- the film characteristics of the transparent conductive anode electrode layer in the laminate having the bright conductive anode electrode layer were as follows: visible light transmittance: 82.2%, haze value: 2.0%, surface resistance value: 800 ⁇ / cm2. (The haze value and the surface resistance value have been improved because the ultraviolet-curable adhesive permeated and hardened between the ITO fine particles of the transparent conductive anode electrode layer).
- the flatness of the smooth transparent conductive electrode layer was Ra: 5.5 nm.
- the transparent substrate was preheated to 40 ° C on the smooth peeled surface of the transparent conductive anode electrode layer obtained by peeling the smooth substrate (PET film) of the transparent conductive laminate, the example was obtained.
- the same coating solution for forming a polymer light emitting layer as in 1 was spin-coated (150 rpm, 60 seconds) and further subjected to vacuum heating at 80 ° C. for 60 minutes to form a polymer light emitting layer.
- Vacuum deposition was performed on the polymer light emitting layer in the order of calcium (Ca) and silver (Ag) to form a two-force electrode layer composed of Ca and Ag (size: 0.5 cm X O. 5 cm ) Was formed to obtain an organic EL device according to Example 4.
- a DC voltage of 15 V was applied between the transparent conductive anode electrode layer and the cathode electrode layer of the obtained organic EL device (anode: +, power source:-), orange light emission was confirmed.
- the average particle size of the conductive oxide fine particles was evaluated with a transmission electron microscope manufactured by JEOL Ltd.
- the dispersed particle size of the conductive fine particles in the coating liquid for forming the transparent conductive anode electrode layer was evaluated using a laser scattering particle size analyzer (ELS-800) manufactured by Otsuka Electronics Co., Ltd.
- a hole injection layer was formed on a PET film (manufactured by Teijin Limited, 100 m thick) as a smooth substrate.
- Example 5 A transparent conductive laminate according to Example 5 consisting of a plate, a Z hole injection layer, a Z transparent conductive anode electrode layer, a Z adhesive layer, and a Z transparent base material was obtained.
- the PET film as a smooth substrate could be easily peeled off at the adhesive interface with the hole injection layer.
- the flatness of the smooth transparent conductive anode electrode layer was Ra: 5.6 nm.
- PET film smooth substrate
- the above-mentioned coating liquid for forming a transparent conductive anode electrode layer was screen-printed on the above-mentioned hole injecting layer, and then heat-treated at 40 ° C for 15 minutes and at 120 ° C for 30 minutes to obtain a 1 mm width.
- the film characteristics of the transparent conductive anode electrode layer were as follows: visible light transmittance: 91.0%, haze value: 5.8%, surface resistance value: 950 ⁇ square.
- auxiliary electrode layer (DCG-310C-CN20, manufactured by Sumitomo Metal Mining Co., Ltd.) containing silver colloid particles having an average particle diameter of 6 nm and a solvent as main components is applied. Then, a heat treatment was performed at 120 ° C. for 30 minutes to form a line having a width of 0.2 mm and a thickness of 3 m, thereby forming an opaque auxiliary electrode layer having a surface resistance of 0.08 ⁇ .
- DCG-310C-CN20 manufactured by Sumitomo Metal Mining Co., Ltd.
- Example 6 consisting of a smooth substrate, a Z hole injection layer, a Z auxiliary electrode layer, and a transparent conductive anode electrode layer, a Z adhesive layer, and a transparent base material.
- a laminate was obtained.
- the PET film as a smooth substrate could be easily peeled off at the bonding interface with the hole injection layer.
- the transparent substrate was preheated to 40 ° C on the smooth peeled surface of the hole injection layer obtained by peeling the smooth substrate (PET film) from the transparent conductive laminate, and then the Example 1 was obtained.
- Example 2 The same polymer luminescent layer forming coating solution as in Example 1 was spin-coated (150 rpm, 60 seconds), and further subjected to vacuum heating at 80 ° C. for 60 minutes to form a polymer luminescent layer.
- the flatness of the smooth transparent conductive anode electrode layer was Ra: 5.6 nm.
- Vacuum deposition was performed on the polymer light emitting layer in the order of calcium (Ca) and silver (Ag) to form a two-force force electrode layer composed of Ca and Ag (size: 0.5cm X O.5cm). ) was formed to obtain an organic EL device according to Example 5.
- a DC voltage of 15 V was applied between the transparent conductive anode electrode layer and the cathode electrode layer of the obtained organic EL device (anode: +, power source:-), orange light emission was confirmed.
- the above-mentioned coating solution for forming a transparent conductive anode electrode layer was wire-bar-coated (wire diameter: 0.4 mm) on the above-mentioned hole injecting layer, and was subjected to 15 minutes at 40 ° C and 30 minutes at 120 ° C.
- a transparent conductive anode electrode layer (thickness: 3 m) composed of ITO fine particles was formed on a smooth substrate.
- the film properties of the transparent conductive anode electrode layer were as follows: visible light transmittance: 81.0%, haze value: 18.9%, and surface resistance value: 1500 ⁇ / cm2.
- Example 7 a transparent conductive laminate according to Example 7 consisting of a smooth substrate Z, a hole injection layer Z, a transparent conductive anode electrode layer Z, an adhesive layer Z, and a transparent base material was obtained.
- the PET film as a smooth substrate could be easily peeled off at the adhesive interface with the hole injection layer.
- the flatness of the smooth transparent conductive anode electrode layer was Ra: 5.6 nm.
- the particle shape of the conductive oxide fine particles was evaluated with a transmission electron microscope manufactured by JEOL Ltd.
- the dispersed particle size of the conductive fine particles in the coating liquid for forming the transparent conductive anode electrode layer was evaluated using a laser scattering particle size analyzer (ELS-800) manufactured by Otsuka Electronics Co., Ltd.
- a smooth substrate Z-hole injection layer was prepared in the same manner as in Example 5, except that silica gel fine particles were added to the adhesive as a dehydrating agent, and the adhesive was applied to an average thickness of 100 m.
- a transparent conductive laminate according to Example 8 comprising a Z transparent conductive anode electrode layer, a Z adhesive layer, and a Z transparent substrate was obtained.
- the PET film as a smooth substrate could be easily peeled off at the adhesive interface with the hole injection layer.
- the water content in the adhesive was substantially eliminated by adding the dewatering agent.
- the flatness of the smooth transparent conductive anode electrode layer was Ra: 5.6 nm.
- Example 8 In the same manner as in Example 5, a polymer light-emitting layer and a force electrode layer were formed to obtain an organic EL device according to Example 8. When a DC voltage of 15 V was applied between the transparent conductive anode electrode layer and the force sword electrode layer of the obtained organic EL device (anode: +, force sword:-), orange light emission was confirmed.
- the coating solution for forming the transparent conductive anode electrode layer used in Example 4 was coated on a glass substrate (soda lime glass, thickness lmm) by wire bar coating (wire diameter: 0.3 mm), and heated at 40 ° C. Heat treatment was performed for 15 minutes and at 120 ° C for 30 minutes to form a transparent conductive anode electrode layer (thickness: 3 m) composed of ITO fine particles on a smooth substrate.
- the film properties of the transparent conductive anode electrode layer were as follows: visible light transmittance: 80.5%, haze value: 3.1%, surface resistance value: 4200 ⁇ .
- Example 2 After the glass substrate on which the transparent conductive anode electrode layer was formed was preheated to 40 ° C, the same coating solution for forming a polymer light emitting layer as in Example 1 was spin-coated on the transparent conductive anode electrode layer. (150 rpm, 60 seconds) and vacuum heating at 80 ° C for 60 minutes to form a polymer light emitting layer. On this polymer light-emitting layer, a two-layer force electrode layer (size: 0.5 cm X O. 5 cm) having Ca and Ag forces was formed in the same manner as in Example 4, and a smooth substrate and an adhesive were used. No Organic EL device according to Comparative Example 2 was obtained.
- the organic EL device according to Examples 18 to 18 of the present invention uses a specific transparent conductive laminate despite having the transparent conductive anode electrode layer formed by the coating method. Stable light emission was confirmed by applying a DC voltage.
- the polymer having no irregularities or protrusions is formed on the smooth peeled surface of the transparent conductive anode electrode layer in a state where the smooth substrate is peeled off. Since a light emitting layer and a force electrode layer can be easily formed, it can be used as a part of a component of an organic EL device.
- the transparent conductive anode electrode layer can be formed by a coating method, a low-temperature film can be formed simply and at low cost, and a light source such as a liquid crystal knock light which is less likely to cause deterioration of the polymer light emitting layer.
- an organic EL element applicable to a display device such as a display.
Abstract
Description
Claims
Priority Applications (2)
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US10/570,801 US8040042B2 (en) | 2003-09-08 | 2004-09-08 | Transparent electroconductive layered structure, organic electroluminescent device using the same layered structure, method for producing the same layered structure, and method for producing the same device |
JP2005513710A JP4983021B2 (ja) | 2003-09-08 | 2004-09-08 | 透明導電積層体とそれを用いた有機el素子、及びそれらの製造方法 |
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JP2003315006 | 2003-09-08 | ||
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WO2005024853A1 true WO2005024853A1 (ja) | 2005-03-17 |
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PCT/JP2004/013030 WO2005024853A1 (ja) | 2003-09-08 | 2004-09-08 | 透明導電積層体とそれを用いた有機el素子、及びそれらの製造方法 |
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US (1) | US8040042B2 (ja) |
JP (1) | JP4983021B2 (ja) |
CN (1) | CN100587857C (ja) |
WO (1) | WO2005024853A1 (ja) |
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JPWO2014157639A1 (ja) * | 2013-03-28 | 2017-02-16 | 国立研究開発法人物質・材料研究機構 | 有機el素子及びその製造方法 |
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US20080258605A1 (en) | 2008-10-23 |
CN100587857C (zh) | 2010-02-03 |
JPWO2005024853A1 (ja) | 2007-11-08 |
CN1846281A (zh) | 2006-10-11 |
JP4983021B2 (ja) | 2012-07-25 |
US8040042B2 (en) | 2011-10-18 |
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