JP5955678B2 - Base material integrated sealing material for electronic devices - Google Patents

Base material integrated sealing material for electronic devices Download PDF

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JP5955678B2
JP5955678B2 JP2012163537A JP2012163537A JP5955678B2 JP 5955678 B2 JP5955678 B2 JP 5955678B2 JP 2012163537 A JP2012163537 A JP 2012163537A JP 2012163537 A JP2012163537 A JP 2012163537A JP 5955678 B2 JP5955678 B2 JP 5955678B2
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base material
substrate
sealing material
electrolyte
encapsulating
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JP2014026722A (en
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元 由井
元 由井
佐々木　憲司
憲司 佐々木
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Nok Corp
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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
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    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
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    • Y02E10/542—Dye sensitized solar cells

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Description

本発明は、基板間に電解質等の封入物質を介在させて封止した構造の電子デバイスの封止技術に係り、例えば色素増感型太陽電池の対向電極間の電解質や有機ＥＬ（エレクトロルミネッセンス）ディスプレイの対向基板間の封入ガスの封止手段として適用可能な基材一体シール材に関するものである。   The present invention relates to a sealing technique of an electronic device having a structure in which an encapsulating substance such as an electrolyte is interposed between substrates, and for example, an electrolyte or organic EL (electroluminescence) between counter electrodes of a dye-sensitized solar cell. The present invention relates to a base material integrated sealing material that can be used as a sealing means for sealing gas between opposing substrates of a display.

色素増感型太陽電池は、シリコン（Si）のｐｎ接合型の太陽電池に比較して製造コストが安いという利点がある。この種の色素増感型太陽電池は、２枚の電極基板間に液状又はゲル状の電解質が封入された構造を有するため、この電解液を封止するガスケットの封止性能や電解質に対する耐性の向上が、色素増感型太陽電池の信頼性や耐久性において重要である。   The dye-sensitized solar cell has an advantage that the manufacturing cost is lower than that of a silicon (Si) pn junction solar cell. Since this type of dye-sensitized solar cell has a structure in which a liquid or gel electrolyte is sealed between two electrode substrates, the sealing performance of the gasket for sealing the electrolyte and the resistance to the electrolyte are high. Improvement is important in the reliability and durability of the dye-sensitized solar cell.

詳しくは、色素増感型太陽電池は、図４にその基本構造の一例を示すように、シール材１０３を介して互いに対向配置された一対の透明基板１０１，１０２を有し、このうち一方の透明基板１０１における他方の透明基板１０２との対向面に透明な導電膜からなる透明電極１０４が形成されており、この透明電極１０４に光増感色素１０５ｂを吸着させた酸化チタン（TiO２）粒子１０５ａからなる多孔質半導体層１０５が設けられ、他方の透明基板１０２における一方の透明基板１０１との対向面に透明な導電膜及び触媒層からなる対向電極１０６が形成されており、前記多孔質半導体層１０５と対向電極１０６との間にシール材１０３によって画成された密閉隙間には、例えばヨウ素及びヨウ化物を含有する液状又はゲル状の電解質１０７が封入されている。 Specifically, the dye-sensitized solar cell has a pair of transparent substrates 101 and 102 arranged to face each other via a seal material 103, as shown in FIG. A transparent electrode 104 made of a transparent conductive film is formed on the surface of the transparent substrate 101 facing the other transparent substrate 102, and titanium oxide (TiO 2 ) particles having a photosensitizing dye 105 b adsorbed on the transparent electrode 104. A porous semiconductor layer 105 made of 105a is provided, and a counter electrode 106 made of a transparent conductive film and a catalyst layer is formed on the opposite surface of the other transparent substrate 102 to the one transparent substrate 101. In the sealing gap defined by the sealing material 103 between the layer 105 and the counter electrode 106, for example, a liquid or gel electrolyte 10 containing iodine and iodide is provided. There has been sealed.

この種の色素増感型太陽電池は、次のような動作によって発電するものである。まず透明基板１０１に太陽光などの光が当たることによって、光増感色素１０５ｂが光を吸収することにより励起状態となって電子ｅ−を放出し、放出された電子ｅ−は酸化チタン粒子１０５ａを経て透明電極１０４へ移動し、さらに外部負荷Ｒを経由して、対向電極１０６に達する。一方、電子ｅ−を放出することにより酸化した光増感色素１０５ｂは、電解質１０７中のヨウ化物イオンＩ−から電子ｅ−を受け取ることによって元の状態に戻り、これによってヨウ化物イオンＩ−が酸化された三ヨウ化物イオンＩ３ −は、対向電極１０６まで拡散してここで対向電極１０６から電子ｅ−を受け取ることによって還元され、ヨウ化物イオンＩ−となる。還元されたヨウ化物イオンＩ−は、光増感色素１０５ｂによって再び酸化されることになる。そしてこのような酸化還元の繰り返しによって外部負荷Ｒを電流が流れるのである。 This type of dye-sensitized solar cell generates electricity by the following operation. By the light, such as hitting first sunlight transparent substrate 101, is excited by the photosensitizing dye 105b absorbs light electrons e - to release, the emitted electrons e - titanium oxide particles 105a Then, it moves to the transparent electrode 104 and further reaches the counter electrode 106 via the external load R. On the other hand, electrons e - photosensitizing dye 105b oxidized by releasing the iodide ions I in the electrolyte 107 - back to its original state by receiving, thereby iodide ion I - - electrons e from the The oxidized triiodide ion I 3 − diffuses to the counter electrode 106 and is reduced by receiving electrons e − from the counter electrode 106 to become iodide ion I − . The reduced iodide ion I − is oxidized again by the photosensitizing dye 105b. A current flows through the external load R by repeating such oxidation and reduction.

電解質１０７を封止するシール材１０３としては、従来、ＵＶ硬化型接着剤などの接着剤を用いるのが主流となっている（下記の特許文献１，２参照）。   Conventionally, an adhesive such as a UV curable adhesive has been mainly used as the sealing material 103 for sealing the electrolyte 107 (see Patent Documents 1 and 2 below).

しかしながらＵＶ硬化型接着剤によるシール材１０３は、長期にわたって電解質１０７と接触することにより、膨潤したり劣化したりして、封止性が低下するおそれがあり、その結果、電解質１０７が漏れたり、また、外部から透過した水蒸気によって電解質１０７が劣化したりすると、光電変換効率が低下するばかりか、色素増感型太陽電池の信頼性と耐久性が著しく低下するといった問題がある。   However, the sealing material 103 made of a UV curable adhesive may swell or deteriorate due to contact with the electrolyte 107 over a long period of time, and the sealing performance may be reduced. Further, when the electrolyte 107 is deteriorated by water vapor transmitted from the outside, there is a problem that not only the photoelectric conversion efficiency is lowered, but also the reliability and durability of the dye-sensitized solar cell are remarkably lowered.

しかも基板１０１，１０２がＵＶ硬化型接着剤からなるシール材１０３によって互いに接着されてしまうので、分解不可能であり、メンテナンス性に乏しいという問題も指摘される。   Moreover, since the substrates 101 and 102 are bonded to each other by the sealing material 103 made of a UV curable adhesive, there is a problem that they cannot be disassembled and have poor maintainability.

また、シール材１０３として、電解質１０７により膨潤したり劣化したりすることのないゴム系材料からなるガスケットを用いることも考えられるが、ゴム系材料からなるガスケットは水蒸気の透過による電解質１０７の劣化を防止することができず、しかもガスケットに適度な圧縮を与えるためには、基板１０１，１０２を貫通したボルトと、これに螺合したナットによって締結する必要があり（下記の特許文献３参照）、このため基板１０１，１０２がガラス基板であるような場合は、ボルト・ナットの締結によって破損しやすくなる懸念があった。   In addition, a gasket made of a rubber-based material that does not swell or deteriorate with the electrolyte 107 may be used as the sealing material 103. However, the gasket made of a rubber-based material does not deteriorate the electrolyte 107 due to permeation of water vapor. In order to give a proper compression to the gasket, it is necessary to fasten it with a bolt that penetrates the substrates 101 and 102 and a nut that is screwed to the bolt (see Patent Document 3 below), For this reason, when the substrates 101 and 102 are glass substrates, there is a concern that they may be easily damaged by fastening bolts and nuts.

特開２００７−０８７６８４号公報JP 2007-087684 A 特開２００９−２４５７８２号公報JP 2009-245782 A 特開２００６−２０２６８１号公報JP 2006-202681 A

本発明は、以上のような点に鑑みてなされたものであって、その技術的課題は、基板間に電解質等の封入物質を封入した構造の電子デバイスの封止技術において、封入物質に対する耐性及び低水蒸気透過性を有すると共に基板間の締結を不要とすることの可能なシール材を提供することにある。   The present invention has been made in view of the above points, and its technical problem is that it is resistant to an encapsulating substance in an electronic device encapsulating technique in which an encapsulating substance such as an electrolyte is enclosed between substrates. Another object of the present invention is to provide a sealing material that has low water vapor permeability and can eliminate the need for fastening between substrates.

上述した技術的課題を有効に解決するための手段として、請求項１の発明に係る電子デバイス用基材一体シール材は、互いに対向配置された一対の基板の間に封入物質が封入された構造の電子デバイスに用いられて、前記封入物質の周囲を封止するシール材であって、水蒸気に対するバリア性を有する基材と、この基材における前記基板との対向面のうち前記封入物質側に一体的に設けられ、前記基板に密接される耐電解質性を有するゴム材又はゴム状弾性を有する合成樹脂材製のガスケットと、前記対向面のうち前記封入物質と反対側に設けられ前記基板との間に介在される接着層と、からなることを特徴とするものである。なお、ここでいう「基板」とは基板単体のほか、基板に例えば導電膜からなる電極や回路パターンや触媒層などが積層された積層体も含めて総称するものである。   As means for effectively solving the technical problem described above, the base material integrated sealing material for an electronic device according to the invention of claim 1 has a structure in which an encapsulating substance is enclosed between a pair of substrates arranged to face each other. A sealing material for sealing the periphery of the encapsulating substance, and a base material having a barrier property against water vapor, and on the encapsulating substance side of the facing surface of the base material to the substrate. A gasket made of a rubber material having an electrolyte resistance or a synthetic resin material having rubber-like elasticity, which is integrally provided and in close contact with the substrate, and the substrate provided on the opposite side of the opposed surface to the encapsulating substance, And an adhesive layer interposed therebetween. The “substrate” as used herein is a generic term including not only a single substrate but also a laminate in which an electrode made of a conductive film, a circuit pattern, a catalyst layer, and the like are laminated on a substrate.

請求項２の発明に係る電子デバイス用基材一体シール材は、請求項１に記載の構成において、接着層が、ガスケットよりもそのつぶし代に相当する分だけ層厚が小さいことを特徴とするものである。   The base material integrated sealing material for an electronic device according to a second aspect of the invention is characterized in that, in the configuration of the first aspect, the adhesive layer has a smaller layer thickness than the gasket by an amount corresponding to the crushing allowance. Is.

本発明に係る電子デバイス用基材一体シール材は、互いに対向配置された一対の基板間に接着層によって接着され、接着剤からなるシール材を用いた場合と同様に基板が固定されるので、基板間をボルト・ナットなどによって締結しなくても良く、このため基板がガラス基板である場合の破損を防止することができる。また、接着層は基材における基板との対向面のうち封入物質と反対側に設けられているため、封入物質側に設けられた電解質性を有するガスケットによって保護され、したがって封入物質との接触によって膨潤したり劣化したりするおそれがない。また、水蒸気に対するバリア性を有する基材によって水蒸気透過面積が小さくなるので、水蒸気透過量が低減され、その結果、電解質など封止対象の漏れが有効に防止され、かつ外部からの水蒸気の透過による電解質など封入物質の劣化も有効に防止される。   Since the base material integrated sealing material for an electronic device according to the present invention is adhered by an adhesive layer between a pair of substrates arranged opposite to each other, the substrate is fixed in the same manner as when a sealing material made of an adhesive is used. It is not necessary to fasten the substrates with bolts and nuts and the like, and therefore it is possible to prevent breakage when the substrates are glass substrates. In addition, since the adhesive layer is provided on the opposite surface of the base material to the substrate on the side opposite to the encapsulating substance, it is protected by the gasket having the electrolyte property provided on the enclosing substance side, and therefore by contact with the encapsulating substance. There is no risk of swelling or deterioration. In addition, since the water vapor transmission area is reduced by the base material having a barrier property against water vapor, the water vapor transmission amount is reduced. As a result, leakage of the sealing target such as the electrolyte is effectively prevented, and the water vapor is transmitted from the outside. Degradation of the encapsulated material such as electrolyte is also effectively prevented.

本発明に係る電子デバイス用基材一体シール材を、電子デバイスの一部と共に示す説明図である。It is explanatory drawing which shows the base-material integrated sealing material for electronic devices which concerns on this invention with a part of electronic device. 本発明に係る電子デバイス用基材一体シール材を未装着状態で示すもので、（Ａ）は平面図、（Ｂ）は（Ａ）におけるＢ−Ｂ断面図である。The base-material integrated sealing material for electronic devices which concerns on this invention is shown by the unmounted state, (A) is a top view, (B) is BB sectional drawing in (A). カップ法によってゴムの透湿性を評価する試験を行った結果を示すグラフである。It is a graph which shows the result of having done the test which evaluates the moisture permeability of rubber by the cup method. 従来の電子デバイスとして色素増感型太陽電池の基本構造の一例を示す説明図である。It is explanatory drawing which shows an example of the basic structure of a dye-sensitized solar cell as a conventional electronic device.

以下、本発明に係る電子デバイス用基材一体シール材を色素増感型太陽電池の封止手段として適用した好ましい実施の形態について、図１を参照しながら説明する。   Hereinafter, a preferred embodiment in which the base material integrated sealing material for an electronic device according to the present invention is applied as a sealing means for a dye-sensitized solar cell will be described with reference to FIG.

図１に一部を示す電子デバイス１において、参照符号１１，１２は積層体で、互いに対向配置され、このうちの一方の積層体１１は、例えば色素増感型太陽電池における一方の透明基板と、その内側面に形成された透明電極と、光増感色素を吸着させた多孔質半導体層からなるものであり、他方の積層体１２は、例えば前記色素増感型太陽電池における他方の透明基板と、その内側面（一方の積層体１１との対向面）に形成された対向電極からなるものである。なお、積層体１１，１２は、請求項１に記載された基板に相当するものである。   In the electronic device 1 partially shown in FIG. 1, reference numerals 11 and 12 are laminates, which are arranged to face each other, and one of the laminates 11 is, for example, one transparent substrate in a dye-sensitized solar cell. The transparent electrode formed on the inner surface thereof and a porous semiconductor layer adsorbed with a photosensitizing dye, and the other laminate 12 is, for example, the other transparent substrate in the dye-sensitized solar cell. And the counter electrode formed on the inner side surface (the surface facing one laminate 11). The laminated bodies 11 and 12 correspond to the substrate described in claim 1.

積層体１１，１２の間には、ヨウ素及びヨウ化物を含有する液状又はゲル状の電解質などの封入物質１３が封入されており、その周囲は、本発明による基材一体シール材１４によって封止されている。   An encapsulating substance 13 such as a liquid or gel electrolyte containing iodine and iodide is encapsulated between the laminates 11 and 12, and the periphery thereof is sealed by the base material integrated sealing material 14 according to the present invention. Has been.

詳しくは、この基材一体シール材１４は、水蒸気に対するバリア性を有し、かつ電解質に対して不活性の材料、好ましくは例えば厚さｔ１が60μｍ程度の金属箔（例えばアルミ箔）又はＬＣＰ（液晶ポリマー：例えば株式会社プライマテック製ＳＴＡＢＩＡＸなど）の薄板からなる基材１４１と、この基材１４１における積層体１１，１２との対向面のうち封入物質１３側に一体的に設けられ、耐電解質性の高いＥＰＤＭ（エチレンプロピレンジエンゴム）等のゴム材によって一体的に形成されたガスケット１４２，１４３と、前記対向面のうち封入物質１３と反対側に塗布されると共に積層体１１，１２に密着した状態で硬化したＵＶ硬化型接着剤層１４４，１４５からなるものである。なお、ＵＶ硬化型接着剤層１４４，１４５は、請求項１に記載された接着層に相当する。 Specifically, the base material integrated sealing material 14 has a barrier property against water vapor and is inert to the electrolyte, preferably a metal foil (for example, aluminum foil) or an LCP having a thickness t 1 of about 60 μm, for example. (Liquid crystal polymer: for example, STIMAX manufactured by Primatec Co., Ltd.) and a substrate 141 and a laminated body 11, 12 of the substrate 141, which are integrally provided on the encapsulating material 13 side. Gaskets 142 and 143 formed integrally with a rubber material such as EPDM (ethylene propylene diene rubber) having high electrolyte properties, and applied to the opposite side of the encapsulating material 13 on the opposed surfaces and applied to the laminates 11 and 12 It consists of UV curable adhesive layers 144 and 145 cured in a close contact state. The UV curable adhesive layers 144 and 145 correspond to the adhesive layer described in claim 1.

ガスケット１４２，１４３は、積層体１１，１２に密接されるものであって、ガスケット１４２，１４３の厚さは基材１４１に比較して薄いものであり、基材１４１の両面に液状ゴムを薄膜状に塗布して架橋硬化させることによって、例えば厚さｔ２が5〜50μｍ程度となっている。なお、液状ゴムを薄膜状に塗布するにはスクリーン印刷法を採用することが好適である。 The gaskets 142 and 143 are in intimate contact with the laminates 11 and 12, and the gaskets 142 and 143 are thinner than the base material 141, and a liquid rubber film is formed on both surfaces of the base material 141. by crosslinking curing by applying the Jo, for example, the thickness t 2 is in the order of 5 to 50 [mu] m. In order to apply the liquid rubber in a thin film, it is preferable to adopt a screen printing method.

ＵＶ硬化型接着剤層１４４，１４５は、基材１４１におけるガスケット１４２，１４３の外側（封入物質１３と反対側）にＵＶ硬化型接着剤を塗布し、これに透明基板や透明電極などからなる積層体１１，１２を積層してこの積層体１１，１２にガスケット１４２，１４３及びＵＶ硬化型接着剤を密着させた状態で、積層体１１，１２を介して紫外線を照射することにより硬化させて形成したものである。図２に示すように、ＵＶ硬化型接着剤の塗布厚さｔ３は、図１に示す電子デバイス１の組立状態におけるガスケット１４２，１４３のつぶし代を考慮して、ガスケット１４２，１４３の厚さｔ２よりもわずかに薄くすることが望ましい。なお、この場合ＵＶ硬化型接着剤の塗布厚さｔ３とガスケット１４２，１４３の厚さｔ２の差が大きいと、接着しにくくなり、またガスケット１４２，１４３のつぶし代による反発力で接着剥がれを生じやすくなるため、これを考慮してｔ２−ｔ３の大きさは適切に設定する。 The UV curable adhesive layers 144 and 145 are formed by applying a UV curable adhesive on the outer side of the gaskets 142 and 143 (on the opposite side to the encapsulating material 13) in the base material 141, and forming a laminated layer made of a transparent substrate, a transparent electrode, or the like. In the state where the bodies 11 and 12 are laminated and the gaskets 142 and 143 and the UV curable adhesive are in close contact with the laminates 11 and 12, they are cured by irradiating with ultraviolet rays through the laminates 11 and 12. It is a thing. As shown in FIG. 2, the application thickness t 3 of the UV curable adhesive is determined by considering the crushing allowance of the gaskets 142 and 143 in the assembled state of the electronic device 1 shown in FIG. it is desirable to slightly thinner than t 2. Incidentally, if the difference between the thickness t 2 In this case the coating thickness t 3 of UV-curing adhesive and the gasket 142 is large, the adhesive was hardly, also peeling adhesive in repulsive force by squeeze the gasket 142, 143 In view of this, the magnitude of t 2 -t 3 is appropriately set.

上記構成の基材一体シール材１４によれば、ＵＶ硬化型接着剤層１４４，１４５によって積層体１１，１２間に接着され、接着剤からなるシール材を用いた場合と同様に積層体１１，１２が固定されるので、積層体１１，１２間をボルト・ナットなどによって締結しなくても良い。このため積層体１１，１２の透明基板がガラス基板であるような場合の破損を防止することができる。   According to the base material integrated sealing material 14 having the above-described configuration, the laminated body 11, which is adhered between the laminated bodies 11 and 12 by the UV curable adhesive layers 144 and 145 and is used in the same manner as the case where a sealing material made of an adhesive is used. Since 12 is fixed, it is not necessary to fasten between the laminated bodies 11 and 12 with a volt | bolt nut. For this reason, damage in the case where the transparent substrates of the laminates 11 and 12 are glass substrates can be prevented.

そして、ＥＰＤＭは例えば色素増感型太陽電池の電解液として用いられるアセトニトリルに85℃で1000時間浸漬試験をしたところ、膨潤は1.1Vol％程度にとどまり、アセトニトリルに酸化還元剤成分であるヨウ素とヨウ化リチウムを加えた液に85℃で300時間浸漬試験をしたところ、膨潤は2.2Vol％程度にとどまり、すなわち耐電解質性が高いことが確認された。また、図３にカップ法によってゴム（ＥＰＤＭ）の透湿性を評価する試験を行った結果を示すように、ゴムの厚さを薄くするほど、水蒸気の透過量はそれに比例して減少することがわかる。   EPDM was subjected to a 1000-hour immersion test at 85 ° C. in acetonitrile used as an electrolyte for a dye-sensitized solar cell, for example, and the swelling remained at about 1.1 Vol%, and the redox component iodine and iodine were added to acetonitrile. When the immersion test was performed at 85 ° C. for 300 hours in the solution to which lithium fluoride was added, it was confirmed that the swelling was only about 2.2 Vol%, that is, the electrolyte resistance was high. In addition, as shown in FIG. 3 which shows the result of a test for evaluating the moisture permeability of rubber (EPDM) by the cup method, the thinner the rubber is, the smaller the proportion of water vapor permeation decreases. Recognize.

このため、上記構成の基材一体シール材１４によれば、ＥＰＤＭからなるガスケット１４２，１４３が積層体１１，１２に密接することによって、積層体１１，１２の間に封入された液状又はゲル状の電解質などの封入物質１３が外部へ漏れるのを防止することができると共に、ガスケット１４２，１４３の間に、水蒸気に対するバリア性を有し電解質に対して不活性の金属（例えばアルミ）又はＬＣＰからなる基材１４１を備えるため、水蒸気の透過面積が小さくなり、したがって外部からの水蒸気の透過による電解質等の封入物質１３の劣化が抑制される。   For this reason, according to the base material integrated sealing material 14 having the above-described configuration, the gaskets 142 and 143 made of EPDM are in close contact with the laminated bodies 11 and 12, so that the liquid or gel encapsulated between the laminated bodies 11 and 12 is obtained. It is possible to prevent the encapsulating substance 13 such as the electrolyte from leaking to the outside, and between the gaskets 142 and 143, the metal has a barrier property against water vapor and is inert to the electrolyte (for example, aluminum) or LCP. Since the base material 141 is provided, the water vapor transmission area is reduced, and therefore the deterioration of the encapsulating substance 13 such as the electrolyte due to the water vapor transmission from the outside is suppressed.

また、金属箔等からなる基材１４１を一体に有することによって、取り扱い性や組み付け性が向上し、しかも電解質に対する耐性が高いガスケット１４２，１４３によって、ＵＶ硬化型接着剤層１４４，１４５が電解質等の封入物質１３から保護され、すなわちＵＶ硬化型接着剤層１４４，１４５が封入物質１３との接触によって膨潤したり劣化したりすることがない。このため、長期にわたって積層体１１，１２とガスケット１４２，１４３の密接によるシール性が確保される。   Further, by integrally having the base material 141 made of metal foil or the like, the handling property and the assembling property are improved, and the UV curable adhesive layers 144 and 145 are made of the electrolyte by the gaskets 142 and 143 having high resistance to the electrolyte. That is, the UV curable adhesive layers 144 and 145 are not swollen or deteriorated by contact with the encapsulating material 13. For this reason, the sealing property by the close_contact | adherence of the laminated bodies 11 and 12 and the gaskets 142 and 143 is ensured over a long period of time.

なお、上述の実施の形態は、電子デバイス１が色素増感型太陽電池である場合について説明したが、本発明の基材一体シール材１４は、電子デバイス１が例えば有機ＥＬ（エレクトロルミネッセンス）ディスプレイの対向基板間の封入ガスの封止手段としても適用することができる。   In the above-described embodiment, the case where the electronic device 1 is a dye-sensitized solar cell has been described. However, in the base material integrated sealing material 14 of the present invention, the electronic device 1 is, for example, an organic EL (electroluminescence) display. It can also be applied as a sealing means for sealed gas between the opposite substrates.

すなわち、有機ＥＬディスプレイは、互いに対向配置された一対のガラス基板を有し、このうち一方のガラス基板における他方のガラス基板との対向面に有機ＥＬ膜及び電極膜が形成されており、他方のガラス基板との間にシール材によって画成された密閉隙間に乾燥窒素が封入された構造を有する。そしてこの種の有機ＥＬディスプレイも、従来はシール材が紫外線硬化型エポキシ樹脂をベースとしたものであるが、外部からの水蒸気の浸入は、電極膜の酸化や、有機ＥＬ膜の性能の低下を来たすため、透湿を可及的に抑制する必要がある。したがって、シール材として、上述の形態のような基材一体シール材を採用することで、水蒸気の透過を有効に抑制することができると共に、接着剤からなるシール材を用いた場合と同様に基板を固定することができる。   That is, the organic EL display has a pair of glass substrates arranged to face each other, and an organic EL film and an electrode film are formed on one glass substrate facing the other glass substrate, and the other It has a structure in which dry nitrogen is sealed in a sealing gap defined by a sealing material between the glass substrate and the glass substrate. Also, this type of organic EL display is conventionally based on an ultraviolet curable epoxy resin as a sealing material. However, penetration of water vapor from the outside causes oxidation of the electrode film and deterioration of the performance of the organic EL film. Therefore, it is necessary to suppress moisture permeability as much as possible. Therefore, by adopting the base material integrated sealing material as described above as the sealing material, it is possible to effectively suppress the permeation of water vapor, and the substrate as in the case where the sealing material made of an adhesive is used. Can be fixed.

また、接着層としては、上述したＵＶ硬化型接着剤以外の接着剤や、粘着剤あるいは両面粘着テープなども採用することができる。   In addition, as the adhesive layer, an adhesive other than the above-described UV curable adhesive, an adhesive, a double-sided adhesive tape, or the like can also be employed.

１ 電子デバイス
１１，１２ 積層体（基板）
１３ 封入物質
１４ 基材一体シール材
１４１ 基材
１４２，１４３ ガスケット
１４４，１４５ ＵＶ硬化型接着剤層（接着層） 1 Electronic device 11, 12 Laminate (substrate)
13 Encapsulating material 14 Base material integrated sealing material 141 Base material 142, 143 Gasket 144, 145 UV curable adhesive layer (adhesive layer)

Claims (2)

互いに対向配置された一対の基板の間に封入物質が封入された構造の電子デバイスに用いられて、前記封入物質の周囲を封止するシール材であって、水蒸気に対するバリア性を有する基材と、この基材における前記基板との対向面のうち前記封入物質側に一体的に設けられ、前記基板に密接される耐電解質性を有するゴム材又はゴム状弾性を有する合成樹脂材製のガスケットと、前記対向面のうち前記封入物質と反対側に設けられ前記基板との間に介在される接着層と、からなることを特徴とする電子デバイス用基材一体シール材。   A sealing material that is used for an electronic device having a structure in which an encapsulating substance is enclosed between a pair of substrates arranged opposite to each other and seals the periphery of the encapsulating substance, and a base material having a barrier property against water vapor A gasket made of a rubber material or a synthetic resin material having rubber-like elasticity that is integrally provided on the encapsulating material side of the surface of the base material facing the substrate and is in close contact with the substrate; And an adhesive layer provided on the opposite surface of the facing surface opposite to the encapsulating substance and interposed between the substrate and the substrate. 接着層が、ガスケットよりもそのつぶし代に相当する分だけ層厚が小さいことを特徴とする請求項１に記載の電子デバイス用基材一体シール材。   The base material integrated sealing material for an electronic device according to claim 1, wherein the adhesive layer has a layer thickness smaller than that of the gasket by an amount corresponding to the crushing allowance.
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