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WO2013011741A1 - Panneau à électroluminescence organique et son procédé de fabrication - Google Patents

Panneau à électroluminescence organique et son procédé de fabrication Download PDF

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Publication number
WO2013011741A1
WO2013011741A1 PCT/JP2012/063547 JP2012063547W WO2013011741A1 WO 2013011741 A1 WO2013011741 A1 WO 2013011741A1 JP 2012063547 W JP2012063547 W JP 2012063547W WO 2013011741 A1 WO2013011741 A1 WO 2013011741A1
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WO
WIPO (PCT)
Prior art keywords
layer
organic
sheet
electrode
adhesive layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2012/063547
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English (en)
Japanese (ja)
Inventor
功太郎 菊地
真人 奥山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Konica Minolta Inc
Original Assignee
Konica Minolta Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Konica Minolta Inc filed Critical Konica Minolta Inc
Publication of WO2013011741A1 publication Critical patent/WO2013011741A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • 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
    • H10K59/80—Constructional details
    • H10K59/87—Passivation; Containers; Encapsulations
    • H10K59/874—Passivation; Containers; Encapsulations including getter material or desiccant

Definitions

  • the present invention relates to an organic electroluminescence panel, and more particularly to an organic electroluminescence panel sealed with a barrier film and a method for producing the same.
  • a barrier film in which aluminum is laminated on the surface of a plastic substrate or film is used to prevent alteration of articles that require blocking of various gases such as water vapor and oxygen, for example, food, industrial supplies, and pharmaceuticals. Widely used in packaging applications.
  • organic electronic device substrate for liquid crystal display elements, photoelectric conversion elements (solar cells), organic electroluminescence (hereinafter abbreviated as organic EL) elements, and the like.
  • the surface of these electronic devices is covered with a curable resin adhesive layer, or the surface of the barrier film is covered with an adhesive, and the barrier film is surface-bonded to the surface of the organic EL element and sealed by thermocompression bonding.
  • Technology to stop is proposed.
  • a getter material that absorbs oxygen and moisture is formed on the organic EL element, an adhesive layer is formed on the other sealing member, and they are bonded together to form an adhesive for the organic EL element.
  • a getter material that absorbs oxygen and moisture is formed on the organic EL element, an adhesive layer is formed on the other sealing member, and they are bonded together to form an adhesive for the organic EL element.
  • An organic EL panel in which a sealing member is formed on a second electrode of an organic EL element having a first electrode, an organic EL layer, and a second electrode on a flexible substrate, and a method for manufacturing the same,
  • An object of the present invention is to provide an organic EL panel having excellent performance easily by a simple manufacturing process.
  • an organic electroluminescent panel which has a 1st electrode, an organic electroluminescent layer, a 2nd electrode, and a sealing member in this order on a flexible base material, this sealing member adheres in an order from the 2nd electrode side.
  • An organic electroluminescence panel comprising: an agent layer; a sheet-like hygroscopic layer having a hygroscopic layer formed on a support; an adhesive layer; and a barrier film.
  • the sheet-like hygroscopic agent layer is a sheet-like material which is previously formed on a support by containing a hygroscopic agent in a binder.
  • a sheet-like hygroscopic layer having a pressure-sensitive adhesive layer on one side and a hygroscopic layer formed on the other side is bonded so that the pressure-sensitive adhesive layer is in contact with the second electrode.
  • a sheet-like adhesive layer comprising a sheet-like adhesive layer formed on a releasable support and peeled off from the releasable support and bonded to the barrier film. Are bonded so as to be in contact with the sheet-like hygroscopic agent layer to form a sealing member, and a method for producing an organic electroluminescence panel.
  • a hygroscopic agent is disposed on the second electrode.
  • an adhesive layer is provided on one surface of the sheet-like hygroscopic layer formed between two supports in advance, and the adhesive layer is bonded so as to contact the second electrode,
  • a barrier film having an adhesive layer in which an adhesive layer formed in advance on a support is peeled off from the releasable support and bonded to the barrier film, and the adhesive layer absorbs moisture.
  • an adhesive material layer is provided between the second electrode of the organic EL element and the sheet-like moisture absorbent layer, and further on the sheet-like moisture absorbent layer.
  • the element that the first electrode, the electroluminescence layer, and the second electrode have in this order on the flexible substrate is defined as an organic EL element, and the organic EL element is sealed with a sealing member.
  • the stopped panel is defined as an organic EL panel.
  • FIG. 1 is a cross-sectional view showing a preferred example of the layer structure of the organic EL panel of the present invention.
  • an organic EL panel 100 has an organic EL element in which a first electrode 12 is formed on a flexible substrate 11, an organic EL layer 13 is formed thereon, and a second electrode 14 is formed thereon.
  • the sealing member 50 is bonded onto the second electrode.
  • the sealing member 50 includes, in order from the second electrode side, a pressure-sensitive adhesive layer 21, a sheet-like moisture absorbent layer 20, an adhesive layer 30, and a barrier film 40.
  • the sheet-like moisture absorbent layer 20 is a support. 22, a hygroscopic agent layer 23, and a support 23.
  • the support body 23 may be used or not used depending on necessity, and the support body 23 used is the most preferable embodiment of the present invention.
  • FIG. 2 schematically shows a method for forming these laminated structures. Formed by laminating a pressure-sensitive adhesive layer 21 and a sheet-like hygroscopic layer 20 on the organic EL element 10 and further laminating a barrier film 40 having a sheet-like adhesive layer 30 on one surface from above. can do.
  • FIG. 3 shows an example of the manufacturing method of the organic EL panel of the present invention, which uses a flexible base material that continuously runs.
  • FIG. 3A shows a sheet-like hygroscopic layer 20 having a pressure-sensitive adhesive layer 21 and a sheet-like adhesive layer on a continuously running organic EL element in which a plurality of organic EL elements are formed on a flexible substrate.
  • 3 and FIG. 3 (b) are diagrams showing a production method for laminating 30 and the barrier film 40, and FIG. It is a figure which shows the manufacturing method which transfers and bonds the barrier film 40 in which the sheet-like adhesive layer 30 was formed. In either case, after being transferred by a vacuum laminator or a pressure bonding machine, the adhesive layer is cured, and an organic EL panel is formed through a cutting step 60.
  • the flexible substrate referred to in the present invention refers to a flexible substrate, and it is preferable that the light transmittance is usually 80% or more from various resin films, and the oxygen transmittance and humidity transmittance are low.
  • thin glass having a thickness of about 200 ⁇ m or less can also be used as the flexible substrate, and is included in the concept of flexible substrate here.
  • the organic EL element in the present invention is formed by sequentially laminating at least a first electrode (transparent electrode), an organic EL layer, and a second electrode on the flexible substrate.
  • a sealing member comprising an adhesive layer, a sheet-like hygroscopic layer, an adhesive layer, and a barrier film is provided on the second electrode of the organic EL element, although the barrier film basically prevents moisture from entering from the outside, even if moisture enters the barrier film, it is absorbed by the hygroscopic layer and does not reach the organic EL element. .
  • the pressure-sensitive adhesive layer, sheet-like hygroscopic agent layer, adhesive layer and barrier film constituting the sealing member of the present invention will be described sequentially.
  • the sheet-like hygroscopic layer used in the present invention is one in which a hygroscopic layer containing a binder resin component and a hygroscopic component is formed on a support.
  • the binder resin component it is necessary that the moisture-absorbing agent component does not inhibit the moisture adsorption action, and a material having high gas permeability is preferably used.
  • a material having high gas permeability is preferably used.
  • polymer materials such as polyolefin-based, polyacrylic-based, polyacrylonitrile-based, polyamide-based, polyester-based, epoxy-based, polycarbonate-based, and fluorine-based materials can be exemplified.
  • the hygroscopic component is preferably a compound having a moisture adsorption function, and particularly a compound that chemically adsorbs moisture and maintains a solid state even after adsorption.
  • a compound having a moisture adsorption function and particularly a compound that chemically adsorbs moisture and maintains a solid state even after adsorption.
  • metal oxides, metal inorganic acid salts and organic acid salts, and the like can be mentioned.
  • the alkaline earth metal oxide include calcium oxide (CaO), barium oxide (BaO), and magnesium oxide (MgO).
  • sulfate examples include lithium sulfate (Li 2 SO 4 ), sodium sulfate (Na 2 SO 4 ), potassium sulfate (CaSO 4 ), magnesium sulfate (MgSO 4 ), cobalt sulfate (CoSO 4 ), and gallium sulfate (Ga). 2 (SO 4 ) 3 ), titanium sulfate (Ti (SO 4 ) 2 ), nickel sulfate (NiSO 4 ), and the like.
  • hygroscopic silica powder, molecular sieve powder, and the like can also be used.
  • the sheet-like hygroscopic layer As a method for forming the sheet-like hygroscopic layer, 5 to 40% by mass of the binder resin component and 95 to 60% by mass of the hygroscopic component are uniformly mixed, and melted or cast on a support using a solvent.
  • the sheet-like hygroscopic agent layer can be formed by coating and drying.
  • the sheet-like hygroscopic layer of the present invention is more preferably a sandwich type in which the hygroscopic layer is sandwiched between two supports.
  • the sheet-like hygroscopic layer may contain other additives as necessary.
  • the film thickness is preferably 10 to 300 ⁇ m.
  • the elastic modulus is preferably in the range of 10 to 100 MPa in the range of the lamination temperature of 80 to 200 ° C.
  • Adhesive layer In this invention, it has the adhesive layer between the support body which a sheet-like moisture absorbent layer has, and the 2nd electrode of an organic EL element, It is characterized by the above-mentioned.
  • the pressure-sensitive adhesive layer referred to in the present invention is a material that does not require the help of heat or a solvent and can be applied to other subjects with extremely low pressure such as finger pressure, and is made of a material such as rubber, acrylic or silicone. You can choose.
  • a pressure-sensitive adhesive having a storage elastic modulus at 25 ° C. in the range of 1.0 ⁇ 10 4 to 1.0 ⁇ 10 9 Pa in at least a part of the pressure-sensitive adhesive layer is preferably used.
  • a curable pressure-sensitive adhesive that forms a high molecular weight body or a crosslinked structure by various chemical reactions after being applied and bonded may be used.
  • urethane adhesives examples include, for example, urethane adhesives, epoxy adhesives, aqueous polymer-isocyanate adhesives, curable adhesives such as thermosetting acrylic adhesives, moisture-curing urethane adhesives, polyether methacrylate types
  • curable adhesives such as thermosetting acrylic adhesives, moisture-curing urethane adhesives, polyether methacrylate types
  • anaerobic pressure-sensitive adhesives such as ester-based methacrylate type and oxidized polyether methacrylate, cyanoacrylate-based instantaneous pressure-sensitive adhesives, and acrylate-peroxide-based two-component instantaneous pressure-sensitive adhesives.
  • the above-mentioned pressure-sensitive adhesive may be a one-component type or a type in which two or more components are mixed before use.
  • Adhesive layer Next, the adhesive layer used in the present invention will be described.
  • the adhesive layer of the present invention it is preferable to use an adhesive resin coated on a releasable support and formed into a sheet shape.
  • the adhesive layer is formed in a sheet shape previously formed on an organic EL element. Transfer onto the hygroscopic layer or transfer onto the barrier film in advance, peel off the releasable support, and bond the barrier film having the adhesive layer onto the sheet-like hygroscopic layer Is preferred.
  • thermosetting adhesive resin an ultraviolet curable adhesive resin, or the like can be used.
  • thermosetting adhesive resin for example, phenol resin, silicone resin, allyl ester, acrylic resin, epoxy resin, polyimide, or urethane resin can be used.
  • the ultraviolet curable adhesive resin for example, a silicone resin, an acrylic resin, an epoxy resin, a polyimide, or a urethane resin can be used.
  • curable adhesive resins can be obtained as commercial products.
  • Barrier film Although it will not specifically limit as a gas barrier film used for this invention if it has a barriering laminated body on a base film, The thing similar to the flexible base material of an organic EL element can be used. Thin glass having a thickness of about 200 ⁇ m or less may be used, and a humidity transmittance of 10 ⁇ 5 g / m 2 / day or less is preferable.
  • Organic EL element forming step First electrode 12 is formed on flexible substrate 11 directly or via another layer, organic EL layer 13 including a light emitting layer is formed on first electrode 12, and an organic layer is formed. By forming the second electrode 14 on 13, the organic EL element 10 is formed.
  • the organic EL element 10 may be formed of a plurality of organic EL elements on a continuous flexible substrate 11 or may be formed on a single wafer.
  • the conductive material of the first electrode 12 is formed on the substrate 11 that has been subjected to surface processing and cleaning by a film formation method such as sputtering or vapor deposition, and, for example, one pixel is formed by a photolithography process.
  • a film formation method such as sputtering or vapor deposition
  • one pixel is formed by a photolithography process.
  • Four units of 20 ⁇ 16.5 mm are formed in a four-column shape (a total area of 41 ⁇ 34 mm for four pixels), and one unit of the first electrode 12 is formed.
  • the organic EL layer 13 is sequentially stacked on the pixel area of the partitioned first electrode 12.
  • the organic EL layer 13 is formed, for example, by sequentially depositing a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer, and the like by vacuum deposition. . After that, the second electrode 14 is formed on the organic EL layer 13 in the same manner as the first electrode 12 in a quadrant.
  • the sheet-like hygroscopic layer 20 has a hygroscopic agent layer 23 formed on a support 22 in advance, and a support 24 on which a sandwich structure is formed.
  • a pressure-sensitive adhesive layer 21 is formed on one support, and a sheet-like hygroscopic layer 20 formed so as to cover the entire organic EL element portion is used so that the pressure-sensitive adhesive layer 21 is in contact with the second electrode 14. It is arranged on the organic EL element 10.
  • Adhesive layer forming step the adhesive layer 30 is a sheet-like adhesive layer formed in such a width that the adhesive layer 30 is previously formed on the releasable support 31 and covers the flexible substrate of the organic EL element. 30 and is placed in contact with the hygroscopic layer.
  • Bonding step sealing the flexible substrate 11 with the sheet-like moisture absorbent layer 20, the sheet-like adhesive layer 30 and the barrier film 40 having the pressure-sensitive adhesive layer 21 on the organic EL element so as to cover at least the entire organic EL element portion.
  • the barrier film 40 of the stopper member 50 is bonded via the adhesive layer 30.
  • the flexible substrate 11 and the sealing member 50 are pressure-bonded with a predetermined pressure, and heated as necessary to cure the adhesive.
  • the sealing structure can be easily formed by the method of the present invention as described above. That is, by adopting a structure in which the surface of the organic EL element and the sheet-like hygroscopic layer are bonded via an adhesive layer, there are few failures immediately after form, and the light emitting function of the organic EL element can be maintained even during storage over time. It was possible to maintain it well, and an organic EL panel having a reduced thickness and high strength could be obtained.
  • the organic EL element used in the present invention uses a 200 ⁇ m glass substrate as a support, and a substrate on which an ITO (indium tin oxide) film is deposited as a first electrode, and is patterned by a lithography method. A known organic EL layer and a second electrode were formed thereon to form an organic EL element.
  • ITO indium tin oxide
  • the organic EL element obtained as described above is a four-part light emission pattern having a light emission pattern of 20 ⁇ 16.5 mm ⁇ 4 pixels (a total area of 41 ⁇ 34 mm for four pixels).
  • Procedure b Next, the following adhesive A was applied on the aluminum surface of the barrier film prepared in Procedure a.
  • Procedure d The adhesive layer surface of the barrier film prepared by applying the adhesive in Procedure b and the PET surface of the hygroscopic sheet were placed together.
  • Procedure e The organic EL device, the hygroscopic sheet, and the barrier film prepared in Procedure d are pressure-bonded at 100 ° C. for 60 seconds at a pressing force of 0.1 MPa in a reduced pressure environment of 1 ⁇ 10 ⁇ 2 Pa using a vacuum laminator. Further, as a curing treatment, heating was performed at 100 ° C. for 30 minutes, and the organic EL panel no. 1 was produced.
  • sealing configuration 4 The procedures b and d of the sealing configuration 3 are the same as those of the sealing configuration 2, and the organic EL panel No. 4 was produced.
  • the adhesive used is shown below.
  • Adhesive A Thermosetting adhesive (Struct Bond E-413, manufactured by Mitsui Chemicals, Inc.)
  • Adhesive B UV curable adhesive (ThreeBond 3124C, manufactured by Three Bond Co., Ltd.) ⁇ Evaluation of organic EL panel >> About each produced organic EL panel, the generation
  • the organic EL panel was stored in an environmental condition of 60 ° C. and 90% RH. The panel was turned on immediately after the organic EL panel was fabricated and after 300 hours had elapsed after storage, and the number of dark spots (spot-like non-light-emitting portions) and the subsequent generation ratio were observed by area. For lighting the panel, a DC voltage of 5 V was applied to one pixel of the organic EL element using a constant voltage power source. Evaluation was performed by the number or occurrence rate (area ratio) of 4 pixels (41 ⁇ 34 mm). The obtained results are shown in Table 1.
  • the sample of the present invention has a small number of dark spots generated immediately after formation, and has a low dark spot generation rate even after storage, and maintains excellent performance.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

L'invention porte sur un panneau à électroluminescence organique, lequel panneau présente d'excellentes performances avec facilité à l'aide d'un procédé de fabrication simple. Un panneau à électroluminescence organique comprend, sur un substrat souple, dans cet ordre : une première électrode ; une couche à électroluminescence organique ; une seconde électrode ; et un élément d'étanchéité. L'élément d'étanchéité comporte, empilés dans cet ordre à partir du côté de seconde électrode, une couche adhésive, une couche d'agent d'absorption d'humidité en forme de feuille dans laquelle une couche d'absorption est formée sur un corps de support, une couche d'agent de liaison et un film de barrière.
PCT/JP2012/063547 2011-07-15 2012-05-25 Panneau à électroluminescence organique et son procédé de fabrication Ceased WO2013011741A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-156458 2011-07-15
JP2011156458 2011-07-15

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WO2013011741A1 true WO2013011741A1 (fr) 2013-01-24

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PCT/JP2012/063547 Ceased WO2013011741A1 (fr) 2011-07-15 2012-05-25 Panneau à électroluminescence organique et son procédé de fabrication

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WO (1) WO2013011741A1 (fr)

Cited By (4)

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Publication number Priority date Publication date Assignee Title
WO2016015424A1 (fr) * 2014-07-31 2016-02-04 京东方科技集团股份有限公司 Dispositif électroluminescent et appareil d'affichage
CN106025092A (zh) * 2016-07-19 2016-10-12 京东方科技集团股份有限公司 有机电致发光器件及其制备方法、显示装置
JP2019179705A (ja) * 2018-03-30 2019-10-17 東洋製罐グループホールディングス株式会社 有機エレクトロニクスデバイス用封止材
JP2021073673A (ja) * 2021-02-10 2021-05-13 コニカミノルタ株式会社 有機エレクトロルミネッセンス発光装置

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WO2016015424A1 (fr) * 2014-07-31 2016-02-04 京东方科技集团股份有限公司 Dispositif électroluminescent et appareil d'affichage
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CN106025092A (zh) * 2016-07-19 2016-10-12 京东方科技集团股份有限公司 有机电致发光器件及其制备方法、显示装置
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JP2019179705A (ja) * 2018-03-30 2019-10-17 東洋製罐グループホールディングス株式会社 有機エレクトロニクスデバイス用封止材
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JP7495201B2 (ja) 2018-03-30 2024-06-04 東洋製罐グループホールディングス株式会社 有機エレクトロニクスデバイス用封止材
JP2021073673A (ja) * 2021-02-10 2021-05-13 コニカミノルタ株式会社 有機エレクトロルミネッセンス発光装置

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