WO2013146583A1 - 有機エレクトロルミネッセンス照明パネル、その製造方法及び有機エレクトロルミネッセンス照明装置 - Google Patents
有機エレクトロルミネッセンス照明パネル、その製造方法及び有機エレクトロルミネッセンス照明装置 Download PDFInfo
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/02—Details
- H05B33/04—Sealing arrangements, e.g. against humidity
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/10—Apparatus or processes specially adapted to the manufacture of electroluminescent light sources
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/12—Light sources with substantially two-dimensional radiating surfaces
- H05B33/26—Light sources with substantially two-dimensional radiating surfaces characterised by the composition or arrangement of the conductive material used as an electrode
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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
- H10K50/842—Containers
- H10K50/8428—Vertical spacers, e.g. arranged between the sealing arrangement and the OLED
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2102/00—Constructional details relating to the organic devices covered by this subclass
- H10K2102/301—Details of OLEDs
- H10K2102/311—Flexible OLED
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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
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K77/00—Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
- H10K77/10—Substrates, e.g. flexible substrates
- H10K77/111—Flexible substrates
Definitions
- the present invention relates to an organic electroluminescence lighting panel, a manufacturing method thereof, and an organic electroluminescence lighting device.
- An organic EL lighting panel using organic electroluminescence (organic EL) emission is formed by sequentially laminating a transparent electrode layer, an organic EL layer, and an electrode layer on a transparent substrate, and sealing this with a sealing material. Is done.
- a substrate used for an organic EL lighting panel has a high transmittance of light emitted from the organic EL, is transparent, and is required to have rigidity.
- a glass substrate has been applied.
- the glass substrate is fragile and is not easy to handle, and it is not easy to manufacture a glass substrate having a thin film thickness. Since organic EL lighting panels are required to be smaller, thinner, lighter, and flexible, transparent and flexible resin films can be wound into rolls and handled easily.
- organic EL can be produced efficiently, designability can be improved, it is inexpensive, and has attracted attention as an alternative to a glass substrate.
- the organic EL lighting panel is formed by sequentially laminating a transparent electrode layer 12, an organic layer 13, and an electrode layer 14 on a transparent substrate 11, and sealing the transparent substrate 11 with an adhesive 17 of a seal portion 16. It has a structure in which the stopper 15 is fixed, and its thickness is about several millimeters as a whole.
- a transparent resin film having flexibility is used for the transparent substrate 11, and a sealing material 15 having the same flexibility as the substrate is used.
- the ultrathin organic layer 13 having a thickness on the order of nm and the electrode layer 14 are brought into contact with and pressed against the sealing material 15 and are easily damaged.
- a spacer layer is provided in a region on the substrate where the electrode layer is not formed, thereby filling the gap and providing an organic material layer thereon to suppress air intrusion into the gap.
- the organic EL element (Patent Document 1) in which deterioration of the organic EL element due to moisture contained in the air and damage due to bending of the organic material layer are suppressed, and the three-dimensional intersection between the wirings are suppressed.
- a mask spacer is provided on the partition wall that surrounds the pixel electrode of the organic EL element having an organic light emitting layer between the pixel electrode and the counter electrode, and an inorganic film is provided on the partition wall, the mask spacer, and the counter electrode.
- Such an organic EL lighting panel includes an organic EL sealed between the substrate and the sealing material even when bending force is applied to the organic EL lighting panel formed using a flexible substrate.
- an organic EL lighting panel capable of suppressing the occurrence of defects in the organic layer and the electrode layer.
- JP 2005-166445 A JP2009-110785 JP2007-73504A JP2011-154797A
- An object of the present invention is flexibility, and even when bending, impact, or vibration is applied, the occurrence of defects in an organic layer including an organic EL or an electrode layer is suppressed, and thereby dark spots due to short-circuiting or the like are suppressed.
- An object of the present invention is to provide a long-life organic EL lighting panel, an organic EL lighting device using the same, and a method for manufacturing the organic EL lighting panel.
- the present invention is sandwiched between a pair of electrode layers, at least one of which is transparent, and the pair of electrode layers, between a flexible film substrate and at least one of which is transparent.
- An organic electroluminescent lighting panel having an organic layer containing organic electroluminescence The present invention relates to an organic EL lighting panel comprising a plurality of spacers provided on one electrode layer laminated on a flexible film substrate so as to penetrate the organic layer and the other electrode layer.
- the present invention also includes a pair of electrode layers, at least one of which is transparent, sandwiched between the pair of electrode layers and at least one of which is transparent.
- An organic electroluminescent lighting panel having an organic layer containing organic electroluminescence The present invention relates to an organic EL lighting panel comprising a plurality of spacers provided on a flexible film sealing material so as to face the electrode layer and to be disposed above the organic layer.
- the present invention also relates to an organic electroluminescence lighting device using the organic electroluminescence lighting panel.
- the present invention also includes a pair of electrode layers, at least one of which is transparent, sandwiched between the pair of electrode layers and at least one of which is transparent.
- An organic electroluminescence lighting panel having an organic layer containing organic electroluminescence, wherein a photoresist film is laminated on the electrode layer laminated on the flexible film substrate, and the photo A resist film is patterned by photolithography to form a spacer that penetrates the organic layer and the other electrode layer, and a method for producing an organic electroluminescent lighting panel, on the flexible film substrate On the laminated electrode layer, a spacer material is dispensed, inkjet coated, screen flexo, Printing by Labia, a method for manufacturing an organic electroluminescent lighting panel and forming a spacer through said electrode layer of the organic layer and the other.
- the present invention also includes a pair of electrode layers, at least one of which is transparent, sandwiched between the pair of electrode layers and at least one of which is transparent.
- a method for manufacturing an organic electroluminescence lighting panel having an organic layer containing organic electroluminescence wherein a photoresist film is laminated on the flexible film sealing material, and the photoresist film is patterned by photolithography And forming a plurality of spacers opposed to the electrode layer and disposed above the organic layer, and the flexible film sealing material, Above, spacer material is printed by dispensing application, inkjet application, screen flexo gravure Facing the electrode layer, and a method of manufacturing an organic electroluminescent lighting panel and forming a plurality of spacers disposed above the organic layer.
- the organic EL lighting panel of the present invention is flexible and can suppress the occurrence of defects in the organic layer containing the organic EL and the electrode layer even when bent, impacted, or vibrated. The generation of dark spots due to the above can be suppressed, and the life is long.
- FIG. 1 It is a block diagram which shows an example of the organic electroluminescent illumination panel of this invention. It is a figure which shows the cross section in the AA 'line of an example of the organic electroluminescent illumination panel of this invention shown in FIG. It is a figure which shows the cross section in the BB 'line of an example of the organic electroluminescent illumination panel of this invention shown in FIG. It is a figure which shows the cross section which shows the other example of the organic electroluminescent illumination panel of this invention. It is a figure which shows the cross section which shows the other example of the organic electroluminescent illumination panel of this invention. It is a figure which shows operation
- the organic electroluminescent lighting panel of the present invention includes a pair of electrode layers, at least one of which is transparent, between the flexible film base and the flexible film sealing material, at least one of which is transparent, and the pair of An organic electroluminescence lighting panel having an organic layer containing organic electroluminescence sandwiched between electrode layers, A plurality of spacers provided through the organic layer and the other electrode layer are provided on one electrode layer laminated on the flexible film substrate.
- the flexible film base material and the flexible film sealing material also referred to as a flexible film used in the organic electroluminescence lighting panel is transparent, the transparency of the other is questioned. Absent. Specifically, it can be set as a transparent flexible film base material and a flexible film sealing material which does not have transparency.
- the transparency of the flexible film base material or the flexible film sealing material means that the light emission of the organic EL contained in the organic layer can be transmitted and function as an organic EL lighting panel, and has a high transmittance.
- the transmittance of light emission of the organic EL is preferably 80% or more in terms of total light transmittance, and more preferably 84% or more.
- the flexible film base material and the flexible film sealing material are not necessarily the same material, but are preferably similar in bending stress.
- Specific examples of the flexible film include polyesters such as polyethylene naphthalate (PEN) and polyethylene terephthalate (PET), polymethyl methacrylate, polyethyl methacrylate, polymethyl acrylate, and polyethyl acrylate. Acrylic resin, polyethersulfone (PES), polycarbonate (PC) and the like are preferable.
- the thickness of the flexible film substrate may be 20 to 300 ⁇ m
- the thickness of the flexible film sealing material may be 50 to 200 ⁇ m.
- These flexible films may have a gas barrier layer that suppresses permeation of gas such as water.
- a gas barrier layer a transparent layer having an inorganic layer containing silicon nitride, silicon nitride oxide, silicon oxide or the like, a hydrophobic resin layer such as an olefin resin, and a hydrophilic resin layer such as an acrylic resin is preferable. .
- One of the pair of electrode layers is provided on the flexible film substrate. If the flexible film substrate is transparent, a transparent electrode layer is formed, and the transparent electrode layer transmits light emitted from the organic EL contained in the organic layer and functions as an organic EL lighting panel.
- the transparent electrode layer preferably has a high organic EL light emission transmittance.
- the organic EL light emission transmittance is preferably 89% or more in terms of total light transmittance.
- the transparent electrode layer may supply either a hole or an electron carrier.
- the transparent electrode layer is formed of a translucent electrode material such as indium tin oxide (ITO) or indium zinc oxide (IZO). It can be a positive electrode that supplies holes.
- the transparent electrode layer can be formed to a thickness of 100 to 300 nm, for example.
- the electrode layer that forms a pair with the transparent electrode layer is not limited in translucency, and when the transparent electrode layer is a positive electrode formed of the translucent electrode material, can do. Specifically, for example, by forming a light-shielding electrode layer as a negative electrode of a metal thin film such as aluminum or silver, the light emitted from the organic layer is reflected toward the light-transmitting electrode layer, and from the light-emitting surface of the organic EL lighting panel The decrease in the amount of emitted light may be suppressed.
- the thickness of the electrode layer is preferably thick considering the voltage drop due to the wiring resistance, and can be, for example, 50 to 300 nm.
- a transparent organic EL lighting panel is produced by making a flexible film base material and a flexible film sealing material into transparency. be able to. In order to connect the electrode layer and the wiring member, it is preferable to extend one end of the electrode layer to form a connection portion.
- a plurality of spacers are provided on the electrode layer on the flexible film substrate.
- the shape of the spacer is preferably a columnar shape such as a cylinder or a hexagonal column, or a spherical shape.
- a spacer having a linear shape or a large area there is a high tendency to impart rigidity to the organic EL lighting panel, making it difficult to maintain flexibility.
- the contact area with the flexible film is small, and the flexibility of the organic EL lighting panel can be maintained.
- the cross-sectional area that one spacer occupies in the cross section parallel to the surface direction of the organic layer is the cross-sectional area that occupies the organic layer from the function of the spacer that suppresses the contact between the flexible film substrate and the flexible film sealing material.
- the cross-sectional area that the spacer occupies in the cross section parallel to the plane direction of the organic layer preferably corresponds to the area of a circle having an average diameter of 5 ⁇ m or more and 50 ⁇ m or less, and more preferably the area of a circle having an average diameter of 8 ⁇ m or more and 20 ⁇ m or less. It is equivalent to.
- the spacer cross-sectional area is equivalent to the area of a circle having an average diameter of 5 ⁇ m or more, the spacer can be formed more stably when the spacer is produced by photolithography, and the area of the circle having an average diameter of 50 ⁇ m or less. If it corresponds, it tends to be difficult to be visually recognized, and it is possible to increase the aperture ratio, that is, to increase the light emitting area of the organic layer.
- the density at which the plurality of spacers are provided is 100 / cm 2 in the organic layer in order to keep the flexible film base material and the flexible film sealing material in non-contact and to maintain a wide light emitting area of the organic layer. more preferably 400 / cm 2 or less, more preferably, 100 / cm 2 or more and 200 / cm 2 or less. If the density of the spacer is in the above range, even when the organic EL lighting panel is bent, the interval between the flexible films can be maintained, and the occurrence of defects in the organic layer and the electrode layer can be suppressed.
- the height of the spacer is provided so as to penetrate the organic layer and the other electrode layer, and the tip of the spacer reaches a position protruding from the other electrode layer. Specifically, it is preferable that the tip protrudes from the upper surface of the other electrode layer in an average range of 0.2 ⁇ m or more and 100 ⁇ m or less, and more preferably the height protrudes in an average range of 1 ⁇ m or more and 30 ⁇ m or less. It is.
- the material of the spacer may be a resin or an inorganic compound as long as it is a non-conductor that does not cause a short circuit between electrode layers. Specifically, it may be the same material as the flexible film, or a resist used when the electrode layer is formed by photolithography. Among these, when the organic EL lighting panel is bent, it is preferable to have the strength to maintain the interval between the flexible films, and it is preferable to select the material of the spacer in relation to density, manufacturing efficiency, and the like. .
- Examples of the organic layer include those having a structure in which a hole injection layer, a hole transport layer, a light emitting layer containing an organic EL, an electron transport layer, and an electron injection layer are sequentially laminated.
- a plurality of carrier block layers can be provided.
- the hole injection layer lowers the height of the injection barrier for holes injected from the transparent electrode layer to the organic layer, relaxes the difference in energy level between the positive electrode and the hole transport layer, and allows positive injection from the positive electrode.
- the holes are provided so as to be easily injected into the hole transport layer.
- the hole injection layer material for forming the hole injection layer include, for example, arylamine derivatives such as copper phthalocyanine and starburst type aromatic amine, inorganic substances such as vanadium pentoxide and molybdenum trioxide, and F4- A chemical doping with an organic substance such as TCNQ can further lower the injection barrier and lower the driving voltage.
- the hole transport layer is provided in order to increase the transfer rate of holes to the light emitting layer.
- the hole transport layer material forming the hole transport layer preferably has an appropriate ionization potential and at the same time has an electron affinity that prevents leakage of electrons from the light emitting layer.
- Examples of the hole transport layer material include bis (di (p-tolyl) aminophenyl) -1,1-cyclohexane, TPD, N, N′-diphenyl-NN—bis (1-naphthyl) -1,1.
- Triphenyldiamines such as' -biphenyl) -4,4'-diamine ( ⁇ -NPD), starburst aromatic amines, and the like can be used.
- the light emitting layer is a layer that recombines electrons and holes injected from the electrode to emit fluorescence and phosphorescence.
- Examples of the light emitting material forming the light emitting layer include tris (8-quinolinol) aluminum complex (Alq3), bisdiphenylvinylbiphenyl (BDPVBi), 1,3-bis (pt-butylphenyl-1,3,4).
- the light emitting material a material composed of a binary system of a host and a dopant, in which excited state energy generated by the host molecule moves to the dopant molecule and the dopant molecule emits light can be used.
- the two-component light emitting material the above light emitting material, electron transporting material, or hole transporting material can be used.
- a quinolinol metal complex such as Alq3 as a host
- a quinacridone derivative such as 4-dicyanomethylene-2-methyl-6- (p-dimethylaminostyryl) -4H-pyran (DCM) or 2,3-quinacridone as a dopant
- DCM 4-dicyanomethylene-2-methyl-6- (p-dimethylaminostyryl) -4H-pyran
- 2,3-quinacridone 2,3-quinacridone
- Bis (2-methyl-8-hydroxyquinoline) -4-phenylphenol-aluminum complex doped with a coumarin derivative such as 3- (2′-benzothiazole) -7-diethylaminocoumarin
- a dopant doped with condensed polycyclic aromatics such as perylene as a dopant, or 4,4′-bis (m-tolylphenylamino) biphenyl (TPD) as a host hole transport material is doped with a dopant
- CBP 4,4′-biscarbazolylbiphenyl
- 4,4 ′ -A carbazole compound such as bis (9-carbazolyl) -2,2'-dimethylbiphenyl (CDBP), a dopant platinum complex or a tris- (2 ferrinylpyridine) iridium complex (Ir (ppy) 3), (bis (4 , 6-Di-fluorophenyl) -pyridinate-N, C2 ′) picolinate iridium complex (FIr (pic)), (bis (2- (2′-benzo (4,5- ⁇ ) thienyl) pyridinate-N, C2 ′) (acetylacetonate) iridium complexes (Btp2Ir (acac)), Ir (pic) 3, Bt2Ir (acac) and other doped iridium complexes can be used.
- These light emitting materials can be selected according to the target light emission color of the organic EL lighting device.
- the dopant in the case of green emission, Alq3, the dopant is quinacudrine or coumarin, Ir (ppy) 3, etc.
- the dopant in the case of blue emission, DPVBi, the dopant is perylene, a distyrylarylene derivative, FIr (pic), etc., green to blue Use OXD-7 for green emission, DCM, DCJTB, Ir (pic) 3 etc. for dopant for red-orange emission, and rubrene, Bt2Ir (acac) for dopant for yellow emission.
- the light emitting layer for white light emission a three-layer laminated structure containing light emitting materials emitting red, green, and blue, or a two-layer laminated structure containing light emitting materials emitting complementary colors such as blue and yellow, respectively. Further, by forming these light emitting materials of each color by multi-component co-evaporation or the like, a single layer structure in which these light emitting materials are mixed can be obtained. Furthermore, the light-emitting material constituting each color layer in the three-layer or two-layer stacked structure can be a light-emitting layer in which fine pixels such as red, blue, and green are sequentially arranged in a plane.
- a hole blocking layer can be provided as a carrier blocking layer on the light emitting layer.
- the hole blocking layer is provided in order to block holes passing without contributing to light emission in the light emitting layer and to increase the recombination probability with electrons in the light emitting layer.
- BCP 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline
- a triphenyldiamine derivative a triazole derivative, or the like can be used as a material for forming the hole blocking layer.
- the electron transport layer is provided to increase the electron transfer rate to the light-emitting layer, has an appropriate ionization potential, and at the same time has an electron affinity that can prevent holes from leaking from the light-emitting layer. It is preferable to form by.
- the electron transport layer material for forming the electron transport layer include 2- (4-biphenylyl) -5- (4-tert-butylphenyl) -1,3,4-oxadiazole (Bu-PBD), OXD- It is possible to use organic substances such as oxadiazole derivatives such as 7 and the like, triazole derivatives, quinolinol-based metal complexes, and those obtained by chemically doping these organic materials with an electron-donating substance such as an alkali metal such as lithium.
- the electron injection layer has a large energy difference between the work function of a metal material such as aluminum used for forming the electrode layer that is a negative electrode and the electron affinity (LUMO level) of the electron transport layer. It is provided to alleviate the difficulty in injecting electrons into the transport layer.
- the electron injection layer material for forming the electron injection layer is selected from alkali metals such as lithium and cesium, fluorides and oxides of alkaline earth metals such as calcium, magnesium silver and lithium aluminum alloys, etc. A substance having a small work function can be used.
- the thickness of the organic layer provided between the electrode layers can be, for example, 1 to 500 nm for each layer, for a total of 100 to 1000 nm.
- the flexible film sealing material and the electrode layer are provided in the sealing space formed by joining the flexible film base material and the flexible film sealing material of the organic EL lighting panel via the seal portion.
- the filler which suppresses a contact with is filled.
- silicone containing an inert gas or a water trapping agent or the like can be used as the filler.
- the silicone is preferably a high-viscosity liquid dimethylpolysiloxane among the organopolysiloxanes.
- the water catching agent include calcium oxide.
- FIG. 1 As an example of the organic EL lighting panel, the one shown in the configuration diagram of FIG. A cross section taken along the line AA ′ in FIG. 1 is shown in FIG. 2, and a cross section taken along the line BB ′ in FIG. 1 is shown in FIG.
- the organic EL lighting panel shown in FIGS. 1 to 3 is formed by laminating a positive electrode 2 as a transparent electrode layer, an organic layer 3 and a negative electrode 4 as an electrode layer on a transparent flexible film substrate 1 in order.
- the sealing film sealing material 5 is bonded to the flexible film substrate 1 through the seal portion 6 to form a sealing space 7.
- a plurality of spacers 8 are provided on the transparent electrode layer so as to penetrate the organic layer and the electrode layer so that the tips thereof are located above the upper surface of the negative electrode of the electrode layer.
- the tip of the spacer does not contact the sealing material, but may be provided so as to contact the sealing material.
- a transparent electrode layer is formed on a transparent flexible film substrate.
- the transparent electrode layer material can be formed by sputtering, vapor deposition, CVD or the like through a shadow mask.
- a transparent electrode film in which a transparent electrode layer material is uniformly formed can be formed by patterning by photolithography. In order to form a connection portion with a wiring member at one end of the transparent electrode layer, it is preferable to extend one end.
- a spacer is formed on the transparent electrode layer laminated on the transparent flexible film substrate.
- the spacer can be formed by forming a spacer material into a pattern by sputtering, vapor deposition, or the like, and forming it into a pattern by photolithography, or by sputtering, vapor deposition, etc. through a shadow mask. Moreover, it can also form by printing, such as dispense application
- a photoresist can be formed on the electrode layer, and the photoresist film can be patterned by photolithography.
- the photoresist may be either a negative type or a positive type.
- a negative type such as an acrylic resin, novolac, polyimide, or the like can be used.
- photolithography it is possible to form a fine pattern of about 10 ⁇ m, and it is preferable to use a transparent acrylic resin as a resist without blocking light from the organic EL.
- the spacer When the spacer is formed by printing, it can be repeated a plurality of times so that the spacer has a predetermined height.
- the spacer formed by printing is larger in size than the case by photolithography, but the height can be increased, the selection range of materials is wide, the manufacturing process is simple, the manufacturing apparatus is simple, and the manufacturing efficiency is high. Can be manufactured inexpensively.
- Such a spacer can also be formed in a portion where the organic layer on the flexible film substrate is not laminated.
- the insulating portion 9 can be formed on the outer peripheral portion of the panel serving as the negative electrode extraction portion.
- the spacer can be formed with a height different from that of the spacer.
- the insulating part 9 enables the production of organic EL lighting panels having various light emitting shapes, and the transparent electrode layer as a lower layer may be uniformly formed, and the patterning process of the transparent electrode layer may be omitted. it can.
- each layer can be formed by forming the polymer material in a liquid and forming it into a desired shape by printing such as ink jet.
- Each layer can also be formed by spin coating or slit coating and forming into a desired shape by photolithography.
- the other electrode layer that forms a pair with the transparent electrode layer can be formed on the organic layer by vacuum vapor deposition or sputtering.
- a flexible film sealing material is bonded or fused to the transparent flexible film substrate on which the organic layer and the electrode layer are formed via a seal portion, and the organic layer and the electrode layer are placed in the sealed space.
- an ultraviolet curable or thermosetting adhesive such as an epoxy resin or an acrylic resin can be used.
- the adhesive surface of the flexible film substrate and the flexible sealing material may be subjected to surface modification treatment by local atmospheric pressure plasma treatment or coupling treatment to improve the adhesion of the seal part. May be applied. At this time, it is performed in an inert gas environment such as nitrogen, and an inert gas is sealed in the sealed space, whereby an organic EL lighting panel can be obtained.
- the internal pressure is kept constant, and in combination with the spacer, the contact between the electrode layer or the organic layer and the sealing material is suppressed, and damage to the electrode layer or the organic layer due to bending can be suppressed.
- a spacer may be disposed on the flexible film sealing material so as to face the electrode layer and above the organic layer.
- a spacer is provided on the flexible film sealing material 5b.
- the same reference numerals as those in FIG. 1 denote the same members as those in the organic EL lighting panel of FIG.
- the spacer 8b provided on the flexible film sealing material 5b can be formed in the same manner as the spacer 8 in the organic EL lighting device shown in FIG. 1 in the same shape, material, density, and area occupied by the organic layer.
- the electrode layer 4 and the organic layer 3 are provided with an insertion hole 8c that reaches the transparent electrode 2 by inserting the spacer 8b in a portion facing the spacer 8b.
- the height of the spacer 8b formed on such a flexible film sealing material may be the height at which the tip of the spacer 8b comes into contact with the transparent electrode layer 2, but the fluctuation of the distance between the substrates when bent. In view of the above, it is preferable that the height be non-contact. Specifically, although it depends on the height of the sealing space, it is preferably 50 ⁇ m or more and 500 ⁇ m or less.
- Such a spacer 8b can be formed on the flexible film sealing material in the same manner as the spacer 8.
- the insertion hole 8c of the spacer 8b provided in the electrode layer 4 and the organic layer 3 can be formed by not forming a film using a shadow mask when forming the organic layer and the electrode layer.
- a space can be maintained between the electrode layer 4 and the flexible film sealing material 5 by the spacers 8 and 8 b, and the organic EL lighting panel is bent.
- it can suppress that the flexible film and electrode layer as a sealing material contact, and can suppress damage to an electrode layer or an organic layer.
- an organic EL lighting device to which this organic EL lighting panel is applied, it is connected via a wiring to be connected to a connecting portion formed by extending one end of the transparent electrode layer and the electrode layer paired therewith.
- a lighting circuit, a control circuit for the lighting circuit, and the like are provided. Through these, external power can be supplied to the transparent electrode layer and the electrode layer.
- the wiring having a width over the entire width of one end of the electrode can be used.
- a flexible film such as copper polyimide can also be applied as the wiring.
- the organic EL lighting device can be applied to a backlight such as a liquid crystal display.
- Example 1 On a polyethylene naphthalate base film having a thickness of 200 ⁇ m, a transparent conductive layer of indium tin oxide (ITO) was formed and patterned by sputtering through a shadow mask to form a transparent electrode layer. A negative photosensitive acrylic resin solution is applied as a photoresist on the transparent electrode layer, heated, and then a spacer having a diameter of 15 ⁇ m and a height of 5 ⁇ m is formed on the transparent electrode layer at a density of 100 / cm 2 by photolithography. did.
- ITO indium tin oxide
- Cu—Pc copper phthalocyanine
- ⁇ -NPD N, N′-diphenyl-NN—bis (1-naphthyl) -1,1′-biphenyl
- CBP 4,4′-biscarbazolylbiphenyl
- Ir (ppy) 3 tris- (2 ferrinylpyridine) iridium complex
- Btp 2 Ir (acac) Bis (2- (2′-benzo (4,5- ⁇ ) thienyl) pyridinate-N, C2 ′) (acetylacetonate) iridium complex
- FIr (pic) ((Bis (4 , 6-Di-fluorophenyl) -pyridinate-N, C2 ') picolinate iridium complex) and BCP (2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline) in the hole blocking layer
- Electric Transporting layer Alq 3 using LiF on the electron injecting material, sequentially vacuum through a mask (heating) was deposited to form an organic layer.
- Vacuum (heating) vapor deposition was performed on the organic layer using aluminum to form a negative electrode.
- the film thickness of the organic EL element part (electrode layer and organic layer sandwiched between the electrode layer and the organic layer) was 285 nm.
- the spacer protruded 4.7 ⁇ m from the upper surface of the negative electrode.
- a 100 ⁇ m-thick film made of the same material as that of the flexible film base material is bonded to the flexible film base material in which the organic EL element portion is formed using an epoxy adhesive in a nitrogen atmosphere.
- An illumination panel was produced.
- the adhesive surface of the flexible film substrate was subjected to a surface treatment using atmospheric pressure plasma to improve the adhesiveness.
- the driving current was set to a constant current of 25 A / m 2 and the lamp was lit, the driving voltage was 4.6 V and the luminance was 980 cd / m 2 .
- the present invention can be used in any industrial field that requires a surface light source. Specifically, it can be used as a surface light source for display devices of various lighting devices, various display devices, personal computers, and terminal devices such as mobile phones and multi-function mobile phones.
Abstract
Description
可撓性フィルム基材上に積層される一方の電極層上に、有機層及び他方の電極層を貫通して設けられる複数のスペーサーを有することを特徴とする有機EL照明パネルに関する。
可撓性フィルム封止材上に、前記電極層に対向し、且つ、前記有機層の上方に配置されて設けられる複数のスペーサーを有することを特徴とする有機EL照明パネルに関する。
前記可撓性フィルム基材上に積層される一方の前記電極層上に、前記有機層及び他方の前記電極層を貫通して設けられる複数のスペーサーを有することを特徴とする。
[実施例1]
厚さ200μmのポリエチレンナフタレート基材フィルム上に、酸化インジウムスズ(ITO)の透明導電膜を、シャドーマスクを介してスパッタにより成膜・パターニングを行い、透明電極層を形成した。透明電極層上にフォトレジストとしてネガ型感光性アクリル樹脂液を塗布、加熱後、フォトリソグラフィー法により、口径15μm、高さ5μmのスペーサーを、透明電極層上に100個/cm2の密度で形成した。その後、正孔注入材料にCu-Pc(銅フタロシアニン)、正孔輸送材料にα-NPD(N,N’-ジフェニル-N-N-ビス(1-ナフチル)-1,1’-ビフェニル)-4,4’-ジアミン)、発光材料としてCBP(4,4’-ビスカルバゾリルビフェニル)に、Ir(ppy)3 (トリス-(2フェリニルピリジン)イリジウム錯体)、Btp2Ir(acac) (ビス(2-(2’-ベンゾ(4,5- α)チエニル)ピリジネート-N,C2’)(アセチルアセトネート)イリジウム錯体)をドーピング、さらにCBPに、FIr(pic) ((ビス(4,6-ジ-フルオロフェニル)-ピリジネート-N,C2’)ピコリネートイリジウム錯体)をドーピングし、正孔ブロック層にBCP (2,9‐ジメチル‐4,7‐ジフェニル‐1,10‐フェナントロリン)、電子輸送層にAlq3、電子注入材料にLiFを用い、マスクを介して順次真空(加熱)蒸着し、有機層を形成した。有機層上にアルミニウムを用いて真空(加熱)蒸着し、負極を形成した。有機EL素子部(電極層及びこれに挟持された有機層)の膜厚は、有機層と負極層を合せて285nmであった。スペーサーは負極の上面から4.7μm突出していた。その後、可撓性フィルム基材と同じ材質で厚さ100μmのフィルムを、窒素雰囲気下で、エポキシ系接着剤を用いて有機EL素子部を形成した可撓性フィルム基材と接着し、有機EL照明パネルを作製した。このとき、可撓性フィルム基材の接着面は常圧プラズマを用いて表面処理を施し、接着性を高めたものを用いた。
有機EL照明パネルを固定冶具に固定し、振動周波数5~100Hz、加速度1.2Gの負荷をx、y、z方向にそれぞれ1分間加え、これを10回反復し、その後点灯させた。試験を行ったパネル10中、総てのパネルが点灯した。
有機EL照明パネルを固定冶具に固定し、加速度30Gの負荷をx、y、z方向にそれぞれ10msec加え、これを3回反復し、その後点灯させた。試験を行ったパネル10中、総てのパネルが点灯した。
有機EL照明パネルの中心に対し左右辺をそれぞれ60度曲げ、これを30回反復し、その後点灯させた。試験を行ったパネル10中、総てのパネルが点灯した。
スペーサーを設けない他は、実施例1と同様に有機EL照明パネルを作製し、試験を行った。振動試験では、試験を行ったパネル10中、8パネルが点灯しなかった。衝撃試験では、試験を行ったパネル10中、総てが点灯しなかった。屈曲試験では、試験を行ったパネル10中、9パネルが点灯しなかった。
2 透明電極層
3 有機層
4 電極層
5、5b 可撓性フィルム封止材
8、8b スペーサー
Claims (10)
- 少なくとも一方が透明である可撓性フィルム基材と可撓性フィルム封止材間に、少なくとも一方が透明である1対の電極層と、該1対の電極層に挟持される有機エレクトロルミネッセンスを含む有機層とを有する有機エレクトロルミネッセンス照明パネルであって、
前記可撓性フィルム基材上に積層される一方の前記電極層上に、前記有機層及び他方の前記電極層を貫通して設けられる複数のスペーサーを有することを特徴とする有機エレクトロルミネッセンス照明パネル。 - 少なくとも一方が透明である可撓性フィルム基材と可撓性フィルム封止材間に、少なくとも一方が透明である1対の電極層と、該1対の電極層に挟持される有機エレクトロルミネッセンスを含む有機層とを有する有機エレクトロルミネッセンス照明パネルであって、
前記可撓性フィルム封止材上に、前記電極層に対向し、且つ、前記有機層の上方に配置されて設けられる複数のスペーサーを有することを特徴とする有機エレクトロルミネッセンス照明パネル。 - 前記有機層の面方向に平行な断面に占める一つの前記スペーサーの断面積が、平均直径5μm以上、50μm以下の円の面積に相当することを特徴とする請求項1又は2記載の有機エレクトロスミネッセンス照明パネル。
- 前記有機層の面方向に平行な断面における前記スペーサーの密度が、100個/cm2以上、400個/cm2以下の範囲であることを特徴とする請求項1から3のいずれかに記載の有機エレクトロルミネッセンス照明パネル。
- 前記可撓性フィルム基材と前記可撓性フィルム封止材との間に、不活性ガス又は捕水剤を含有するシリコーンが充填されたことを特徴とする請求項1から4のいずれかに記載の有機エレクトロルミネッセンス照明パネル。
- 請求項1から5のいずれか記載の有機エレクトロルミネッセンス照明パネルを用いたことを特徴とする有機エレクトロルミネッセンス照明装置。
- 少なくとも一方が透明である可撓性フィルム基材と可撓性フィルム封止材間に、少なくとも一方が透明である1対の電極層と、該1対の電極層に挟持される有機エレクトロルミネッセンスを含む有機層とを有する有機エレクトロルミネッセンス照明パネルの製造方法であって、
前記可撓性フィルム基材上に積層した前記電極層上に、フォトレジスト膜を積層し、該フォトレジスト膜をフォトリソグラフィーによりパターニングして、前記有機層及び他方の前記電極層を貫通するスペーサーを形成することを特徴とする有機エレクトロルミネッセンス照明パネルの製造方法。 - 少なくとも一方が透明である可撓性フィルム基材と可撓性フィルム封止材間に、少なくとも一方が透明である1対の電極層と、該1対の電極層に挟持される有機エレクトロルミネッセンスを含む有機層とを有する有機エレクトロルミネッセンス照明パネルの製造方法であって、
前記可撓性フィルム基材上に積層した前記電極層上に、スペーサー材料を、ディスペンス塗布、インクジェット塗布、又はスクリーン・フレキソ・グラビアにより印刷して、前記有機層及び他方の前記電極層を貫通するスペーサーを形成することを特徴とする有機エレクトロルミネッセンス照明パネルの製造方法。 - 少なくとも一方が透明である可撓性フィルム基材と可撓性フィルム封止材間に、少なくとも一方が透明である1対の電極層と、該1対の電極層に挟持される有機エレクトロルミネッセンスを含む有機層とを有する有機エレクトロルミネッセンス照明パネルの製造方法であって、
前記可撓性フィルム封止材上に、フォトレジスト膜を積層し、フォトレジスト膜をフォトリソグラフィーによりパターニングして、前記電極層に対向し、且つ、前記有機層の上方に配置される複数のスペーサーを形成することを特徴とする有機エレクトロルミネッセンス照明パネルの製造方法。 - 少なくとも一方が透明である可撓性フィルム基材と可撓性フィルム封止材間に、少なくとも一方が透明である1対の電極層と、該1対の電極層に挟持される有機エレクトロルミネッセンスを含む有機層とを有する有機エレクトロルミネッセンス照明パネルの製造方法であって
前記可撓性フィルム封止材上に、スペーサー材料を、ディスペンス塗布、インクジェット塗布、又はスクリーン・フレキソ・グラビアにより印刷して、前記電極層に対向し、且つ、前記有機層の上方に配置される複数のスペーサーを形成することを特徴とする有機エレクトロルミネッセンス照明パネルの製造方法。
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WO2019130431A1 (ja) * | 2017-12-26 | 2019-07-04 | 堺ディスプレイプロダクト株式会社 | 有機el表示装置およびその製造方法 |
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US11108015B2 (en) | 2021-08-31 |
JP2018170288A (ja) | 2018-11-01 |
US20150076464A1 (en) | 2015-03-19 |
JP6570707B2 (ja) | 2019-09-04 |
JP6751459B2 (ja) | 2020-09-02 |
JP2019145525A (ja) | 2019-08-29 |
US10270058B2 (en) | 2019-04-23 |
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US20190198798A1 (en) | 2019-06-27 |
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