JP2000174297A - Solar cell, and cover material and seal film there for - Google Patents
Solar cell, and cover material and seal film there forInfo
- Publication number
- JP2000174297A JP2000174297A JP10347225A JP34722598A JP2000174297A JP 2000174297 A JP2000174297 A JP 2000174297A JP 10347225 A JP10347225 A JP 10347225A JP 34722598 A JP34722598 A JP 34722598A JP 2000174297 A JP2000174297 A JP 2000174297A
- Authority
- JP
- Japan
- Prior art keywords
- film
- solar cell
- cover material
- transparent
- moisture
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
- B32B17/10788—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing ethylene vinylacetate
Landscapes
- Photovoltaic Devices (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、太陽電池用セルの
透明保護部材として用いられるカバー材、このカバー材
を用いた封止膜及び太陽電池に係り、特に、防湿性と耐
光性を兼備する透明フィルムよりなり、太陽電池の軽量
化、耐衝撃性及び耐久性の向上に有効な太陽電池用カバ
ー材及び太陽電池用カバー材兼用封止膜並びにこの太陽
電池用カバー材を表面側及び／又は裏面側透明保護部材
として用いた、軽量、高耐衝撃性、高耐久性の太陽電池
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cover material used as a transparent protective member for a solar cell, a sealing film using the cover material, and a solar cell. In particular, the present invention has both moisture resistance and light resistance. A solar cell cover material, a solar cell cover material / sealing film which is made of a transparent film and is effective for weight reduction, impact resistance and durability improvement of the solar cell, and the solar cell cover material on the front side and / or The present invention relates to a lightweight, high impact resistance, and high durability solar cell used as a backside transparent protective member.
【０００２】[0002]
【従来の技術】近年、資源の有効利用や環境汚染の防止
等の面から、太陽光を直接電気エネルギーに変換する太
陽電池が注目され、開発が進められている。2. Description of the Related Art In recent years, solar cells which directly convert sunlight into electric energy have been attracting attention from the viewpoints of effective use of resources and prevention of environmental pollution, and their development has been promoted.
【０００３】太陽電池は、一般に、図６に示す如く、受
光面側の表面側透明保護部材としてのガラス基板１１と
裏面側保護部材（バックカバー）１２との間にエチレン
−酢酸ビニル共重合体（ＥＶＡ）フィルム１３Ａ，１３
Ｂの封止膜により、太陽電池用セル、即ち、シリコン等
の発電素子１４を封止した構成とされている。As shown in FIG. 6, a solar cell generally has an ethylene-vinyl acetate copolymer between a glass substrate 11 as a front-side transparent protective member on the light-receiving side and a back-side protective member (back cover) 12. (EVA) Films 13A, 13
The solar cell, that is, the power generation element 14 made of silicon or the like is sealed by the sealing film B.
【０００４】このような太陽電池は、ガラス基板１１、
封止膜用ＥＶＡフィルム１３Ａ、シリコン発電素子１
４、封止膜用ＥＶＡフィルム１３Ｂ及びバックカバー１
２をこの順で積層し、ＥＶＡを加熱溶融して架橋硬化さ
せることにより接着一体化することで製造される。[0004] Such a solar cell comprises a glass substrate 11,
EVA film 13A for sealing film, silicon power generation element 1
4. EVA film 13B for sealing film and back cover 1
2 are laminated in this order, and the EVA is heated and melted and cross-linked and cured to be bonded and integrated to be manufactured.
【０００５】ところで、太陽電池の表面側透明保護部材
としては、紫外線に対する耐久性に優れることがまず第
一に要求されるが、加えて、湿気ないし水の透過による
内部の導線や電極の発錆を防止するために、防湿性に優
れることが極めて重要な要件となる。このため、従来に
おいては、表面側透明保護部材としてはガラス板が用い
られている。[0005] By the way, the surface side transparent protective member of the solar cell is required to be excellent in durability against ultraviolet rays at first. In addition, rust of internal conductors and electrodes due to permeation of moisture or water is required. It is an extremely important requirement that the film has excellent moisture proof properties in order to prevent the occurrence of moisture. For this reason, conventionally, a glass plate has been used as the front side transparent protective member.
【０００６】[0006]
【発明が解決しようとする課題】しかし、ガラス板は耐
光性、防湿性に優れる反面、重量が重く、また、衝撃に
弱く割れ易いという欠点がある。However, while the glass plate is excellent in light resistance and moisture proof, it has the disadvantage that it is heavy, and it is easily damaged by impact.
【０００７】透明樹脂フィルムであれば、軽く、衝撃に
よる破損の問題はないが、現状では耐光性、防湿性がと
もに良好な樹脂フィルムは提供されていない。即ち、例
えば、耐光性に優れる透明樹脂フィルムとして２−エチ
レン−４−フッ化エチレン共重合体（ＥＴＦＥ）等のフ
ッ素樹脂フィルムが知られているが、このものは、透湿
性があるため太陽電池の表面側透明保護部材として適用
することはできない。[0007] A transparent resin film is light and has no problem of breakage due to impact. However, at present, a resin film having both good light resistance and good moisture resistance has not been provided. That is, for example, a fluororesin film such as 2-ethylene-4-fluorinated ethylene copolymer (ETFE) is known as a transparent resin film having excellent light resistance. Cannot be applied as a transparent protective member on the front side.
【０００８】本発明は上記従来の問題点を解決し、太陽
電池用セルの透明保護部材として用いられるカバー材で
あって、防湿性と耐光性を兼備する透明フィルムよりな
り、太陽電池の軽量化、耐衝撃性及び耐久性の向上に有
効な太陽電池用カバー材及び太陽電池用カバー材兼用封
止膜並びにこの太陽電池用カバー材を表面側及び／又は
裏面側透明保護部材として用いた、軽量、高耐衝撃性、
高耐久性の太陽電池を提供することを目的とする。The present invention solves the above-mentioned conventional problems, and is a cover material used as a transparent protective member of a solar cell, which is made of a transparent film having both moisture-proof and light-proof properties, and reduces the weight of the solar cell. , A solar cell cover material that is effective for improving impact resistance and durability, a solar cell cover material dual-purpose sealing film, and a light weight using the solar cell cover material as a front side and / or back side transparent protective member , High impact resistance,
An object is to provide a highly durable solar cell.
【０００９】[0009]
【課題を解決するための手段】本発明の太陽電池用カバ
ー材は、太陽電池用セルの透明保護部材として用いられ
るカバー材であって、透明高耐光フィルムと透明高防湿
フィルムとを、紫外線吸収剤を配合した接着剤で積層一
体化してなることを特徴とする。A cover material for a solar cell according to the present invention is a cover material used as a transparent protective member for a cell for a solar cell. It is characterized by being laminated and integrated with an adhesive containing an agent.
【００１０】本発明の太陽電池用カバー材であれば、太
陽電池の透明保護部材に要求される防湿性を透明高防湿
フィルムにより、また、耐光性を透明高耐光フィルムと
接着剤中の紫外線吸収剤により確保することができる。In the cover material for a solar cell of the present invention, the moisture resistance required for the transparent protective member of the solar cell is provided by a transparent high moisture-proof film, and the light resistance is provided by the transparent high light-resistant film and the ultraviolet absorption in the adhesive. Agent.
【００１１】本発明において、透明高防湿フィルムとし
ては、ポリエチレンテレフタレート（ＰＥＴ）フィルム
等に、シリカ又はアルミナ等の無機酸化物をコーティン
グした透明フィルム、或いは、この透明フィルム２枚を
コーティング面同士を貼り合わせてなる積層フィルムが
好適である。In the present invention, as the transparent high moisture-proof film, a transparent film obtained by coating a polyethylene terephthalate (PET) film or the like with an inorganic oxide such as silica or alumina, or two such transparent films with their coated surfaces adhered to each other A laminated film obtained by combining them is preferable.
【００１２】また、透明高耐光フィルムとしては、ポリ
テトラフルオロエチレン（ＰＴＦＥ）、４−フッ化エチ
レン−パークロロアルコキシ共重合体（ＰＦＡ）、４−
フッ化エチレン−６−フッ化プロピレン共重合体（ＦＥ
Ｐ）、２−エチレン−４−フッ化エチレン共重合体（Ｅ
ＴＦＥ）、ポリ３−フッ化塩化エチレン（ＰＣＴＦ
Ｅ）、ポリフッ化ビニリデン（ＰＶＤＦ）及びポリフッ
化ビニル（ＰＶＦ）等のフッ素樹脂フィルム、或いは、
アクリル、ポリカーボネート、ＰＥＴ、ポリエチレンナ
フタレート（ＰＥＮ）等の樹脂に紫外線吸収剤を練り込
んだ樹脂組成物を成膜したものが好適である。Further, as the transparent high light-resistant film, polytetrafluoroethylene (PTFE), 4-fluoroethylene-perchloroalkoxy copolymer (PFA),
Fluoroethylene-6-fluoropropylene copolymer (FE
P), 2-ethylene-4-fluoroethylene copolymer (E
TFE), poly 3-fluorochloroethylene (PCTF)
E), a fluororesin film such as polyvinylidene fluoride (PVDF) and polyvinyl fluoride (PVF), or
What formed the resin composition which kneaded the ultraviolet absorber into resin, such as acrylic, polycarbonate, PET, and polyethylene naphthalate (PEN), is suitable.
【００１３】本発明の太陽電池用カバー材兼用封止膜
は、太陽電池用セルの透明保護部材を兼ねた封止膜であ
って、上記本発明の太陽電池用カバー材とＥＶＡフィル
ムとを積層一体化してなるものである。The solar cell cover material / sealing film of the present invention is a sealing film which also serves as a transparent protective member of a solar cell, and is obtained by laminating the above solar cell cover material of the present invention and an EVA film. It is one that is integrated.
【００１４】本発明の太陽電池は、表面側保護部材と裏
面側保護部材との間に太陽電池用セルを封止してなる太
陽電池において、表面側及び／又は裏面側保護部材とし
て上記本発明の太陽電池用カバー材を用いたものであ
る。The solar cell according to the present invention is a solar cell in which a solar cell is sealed between a front-side protective member and a back-side protective member. Using the solar cell cover material.
【００１５】[0015]
【発明の実施の形態】以下に図面を参照して本発明の実
施の形態を詳細に説明する。Embodiments of the present invention will be described below in detail with reference to the drawings.
【００１６】なお、以下においては、本発明の太陽電池
用カバー材を表面側透明保護部材として用いた場合を例
示するが、本発明の太陽電池用カバー材は、裏面側透明
保護部材として用いても良く、また、表面側と裏面側の
両保護部材として用いても良い。In the following, a case where the solar cell cover material of the present invention is used as a front side transparent protective member will be exemplified. However, the solar cell cover material of the present invention is used as a back side transparent protective member. Alternatively, it may be used as both a front surface side and a back surface side protective member.
【００１７】図１は本発明の太陽電池用カバー材の実施
の形態を示す断面図、図２，３は本発明に係る透明高防
湿フィルムの実施の形態を示す断面図、図４は本発明の
太陽電池用カバー材兼用封止膜の実施の形態を示す断面
図、図５は本発明の太陽電池の実施の形態を示す断面図
である。FIG. 1 is a sectional view showing an embodiment of a cover material for a solar cell according to the present invention, FIGS. 2 and 3 are sectional views showing an embodiment of a transparent and highly moisture-proof film according to the present invention, and FIG. FIG. 5 is a cross-sectional view showing an embodiment of a solar cell cover material / sealing film, and FIG. 5 is a cross-sectional view showing an embodiment of a solar cell of the present invention.
【００１８】図１に示す太陽電池用カバー材１は、透明
高防湿フィルム２と透明高耐光フィルム３とを紫外線吸
収剤を配合した接着剤のシート（以下「紫外線吸収接着
シート」と称す。）４を介して積層し、接着一体化した
ものである。The cover material 1 for a solar cell shown in FIG. 1 is a sheet of an adhesive in which a transparent and highly moisture-proof film 2 and a transparent and highly light-resistant film 3 are blended with an ultraviolet absorbent (hereinafter referred to as "ultraviolet absorbing adhesive sheet"). 4 and are bonded and integrated.
【００１９】透明高防湿フィルム２としては、図２に示
す如く、ＰＥＴフィルム等の透明基材フィルム２ＡにＣ
ＶＤ（化学蒸着）、ＰＶＤ（反応蒸着）法等により、シ
リカ、アルミナ等の無機酸化物のコーティング膜よりな
る防湿膜２Ｂを形成したものが好ましい。即ち、防湿フ
ィルムとしては、基材フィルムにアルミニウム等の金属
のコーティング膜を形成したものも知られているが、ア
ルミニウム等の金属では、太陽電池に適用した場合、電
流がリークする恐れがあるため、防湿膜としては、無機
酸化物のコーティング膜が好ましい。As shown in FIG. 2, a transparent base film 2A such as a PET film is coated with C.
It is preferable to form a moisture-proof film 2B made of a coating film of an inorganic oxide such as silica or alumina by VD (chemical vapor deposition), PVD (reactive vapor deposition), or the like. That is, as a moisture-proof film, a film obtained by forming a coating film of a metal such as aluminum on a base film is also known. However, when a metal such as aluminum is applied to a solar cell, current may leak. As the moisture-proof film, an inorganic oxide coating film is preferable.
【００２０】ところで、図２に示す如く、基材フィルム
２Ａの表面に形成したシリカ、アルミナ等の無機酸化物
よりなる防湿膜２Ｂは、取り扱い時等に剥離し易い。こ
のため、透明高防湿フィルム２としては、図３に示す如
く、上述のＰＥＴフィルム等の基材フィルム２Ａの表面
にシリカ、アルミナ等の無機酸化物よりなる防湿膜２Ｂ
を形成したフィルムを２枚用い、これらを防湿膜２Ｂ，
２Ｂ側を内側にして接着シート２Ｃで貼り合わせること
により、防湿膜２Ｂが表面に露出しないようにしたもの
を用いるのが好ましい。この接着シート２Ｃとしては、
後述の透明高防湿フィルム２と透明高耐光フィルム３の
接着に用いられる紫外線吸収接着シート４と同様のもの
を用いることができ（ただし、紫外線吸収剤は配合され
ていなくても良いが、配合されていることが望まし
い。）、その接着条件で接着処理すれば良い。As shown in FIG. 2, the moisture-proof film 2B made of an inorganic oxide such as silica or alumina formed on the surface of the base film 2A is easily peeled off during handling. Therefore, as shown in FIG. 3, the transparent high moisture-proof film 2 has a moisture-proof film 2B made of an inorganic oxide such as silica or alumina on the surface of a base film 2A such as a PET film.
Are used, and these are used as moisture-proof films 2B,
It is preferable to use a film in which the moisture-proof film 2B is not exposed on the surface by bonding with the adhesive sheet 2C with the 2B side inside. As the adhesive sheet 2C,
The same UV-absorbing adhesive sheet 4 used for bonding the transparent high-moisture-proof film 2 and the transparent high-light-resistant film 3 described later can be used (however, the UV-absorbing agent may not be compounded, It is desirable to perform the bonding treatment under the bonding conditions.
【００２１】なお、図３に示すような貼り合せタイプの
透明高防湿フィルムの場合、基材フィルム２Ａとしては
厚さ６〜２５０μｍのＰＥＴフィルムが好適であり、防
湿膜２Ｂは５μｍ以下程度の厚さに形成するのが好まし
い。また、接着シート２Ｃの厚さは５〜５０μｍ程度と
するのが好ましい。In the case of a laminated high moisture barrier film as shown in FIG. 3, a PET film having a thickness of 6 to 250 μm is suitable as the base film 2A, and a moisture barrier film 2B having a thickness of about 5 μm or less. It is preferable to form it. Further, the thickness of the adhesive sheet 2C is preferably about 5 to 50 μm.
【００２２】透明高耐光フィルム３としては、耐紫外線
性に優れたフッ素樹脂フィルム又は、紫外線吸収剤を練
り込んだ樹脂フィルムが挙げられる。Examples of the transparent high light-resistant film 3 include a fluororesin film excellent in ultraviolet light resistance and a resin film kneaded with an ultraviolet absorbent.
【００２３】このうち、フッ素樹脂フィルムとしては、
ＰＴＦＥ、ＰＦＡ、ＦＥＰ、ＥＴＦＥ、ＰＣＴＦＥ、Ｐ
ＶＤＦ、ＰＶＦフィルム等が挙げられる。Among them, the fluororesin film includes:
PTFE, PFA, FEP, ETFE, PCTFE, P
VDF, PVF film and the like can be mentioned.
【００２４】また、紫外線吸収剤を練り込んだ樹脂フィ
ルムとしては、アクリル、ポリカーボネート、ＰＥＴ、
ＰＥＮフィルム等が挙げられ、その紫外線吸収剤として
は、２−ヒドロキシ−４−オクトキシベンゾフェノン、
２−ヒドロキシ−メトキシ−５−スルフォベンゾフェノ
ン等のベンゾフェノン系；２−（２’−ヒドロキシ−５
−メチルフェニル）ベンゾトリアゾール等のベンゾトリ
アゾール系；フェニルサルシレート、ｐ−ｔ−ブチルフ
ェニルサルシレート等のヒンダートアミン系紫外線吸収
材が挙げられ、通常の場合、基材樹脂に対して１〜２０
重量％程度配合される。As the resin film into which the ultraviolet absorbent is kneaded, acrylic, polycarbonate, PET,
PEN film and the like, and as the ultraviolet absorber, 2-hydroxy-4-octoxybenzophenone,
Benzophenones such as 2-hydroxy-methoxy-5-sulfobenzophenone; 2- (2′-hydroxy-5
Benzotriazoles such as-(methylphenyl) benzotriazole; hindered amine ultraviolet absorbers such as phenyl salicylate and pt-butylphenyl salicylate; ~ 20
It is blended in about weight%.
【００２５】このような透明高耐光フィルム３の厚さ
は、６〜２００μｍ程度であることが好ましい。It is preferable that the thickness of such a transparent light-resistant film 3 is about 6 to 200 μm.
【００２６】紫外線吸収接着シート４としては、エポキ
シ系、アクリル系、ウレタン系、エステル系等の各種の
接着剤樹脂に紫外線吸収剤を配合して成膜したものを用
いることができる。ここで、紫外線吸収剤としては、２
−ヒドロキシ−４−オクトキシベンゾフェノン、２−ヒ
ドロキシ−メトキシ−５−スルフォベンゾフェノン等の
ベンゾフェノン系；２−（２’−ヒドロキシ−５−メチ
ルフェニル）ベンゾトリアゾール等のベンゾトリアゾー
ル系；フェニルサルシレート、ｐ−ｔ−ブチルフェニル
サルシレート等のヒンダートアミン系紫外線吸収剤が挙
げられ、通常の場合、基材樹脂に対して１〜５０重量％
程度配合される。このような紫外線吸収接着シート４の
厚さは５〜５０μｍ程度であることが好ましい。As the ultraviolet absorbing adhesive sheet 4, a film formed by blending an ultraviolet absorbing agent with various kinds of adhesive resins such as epoxy, acrylic, urethane, and ester can be used. Here, as the ultraviolet absorber, 2
Benzophenones such as -hydroxy-4-octoxybenzophenone and 2-hydroxy-methoxy-5-sulfobenzophenone; benzotriazoles such as 2- (2'-hydroxy-5-methylphenyl) benzotriazole; phenylsalicylate And a hindered amine-based ultraviolet absorber such as pt-butylphenyl salicylate, and usually, 1 to 50% by weight based on the base resin.
Degree is blended. The thickness of such an ultraviolet absorbing adhesive sheet 4 is preferably about 5 to 50 μm.
【００２７】本発明の太陽電池用カバー材１は、上述の
透明高防湿フィルム２と透明高耐光フィルム３との間に
紫外線吸収接着シート４を介在させて、当該紫外線吸収
接着シート４の接着条件で加熱加圧するなどして接着一
体化することにより、容易に製造することができる。In the solar cell cover material 1 of the present invention, the ultraviolet absorbing adhesive sheet 4 is interposed between the above-mentioned transparent and highly moisture-proof film 2 and the transparent and highly light-resistant film 3, and the bonding conditions of the ultraviolet absorbing adhesive sheet 4 are set. It is easy to manufacture by bonding and integrating by heating and pressing.
【００２８】なお、本発明のカバー材は透明高耐光フィ
ルム３が表面側に、透明高防湿フィルム２が内面側に配
置されるのが好ましい。In the cover material of the present invention, it is preferable that the transparent light-resistant film 3 is disposed on the front side and the transparent high moisture-proof film 2 is disposed on the inner side.
【００２９】このような太陽電池用カバー材を用いて本
発明の太陽電池を製造するには、図６に示す従来の太陽
電池のガラス板の代りに本発明のカバー材を用いて封止
を行えば良いが、その際、本発明のカバー材を予め封止
用ＥＶＡフィルムと積層一体化して用いるのが好適であ
る。In order to manufacture the solar cell of the present invention using such a solar cell cover material, sealing is performed by using the cover material of the present invention instead of the conventional solar cell glass plate shown in FIG. At this time, it is preferable to use the cover material of the present invention by previously laminating and integrating it with the sealing EVA film.
【００３０】図４に示す通り、本発明の太陽電池用カバ
ー材兼用封止膜５は、透明高防湿フィルム２と透明高耐
光フィルム３とを紫外線吸収剤を配合した接着剤で接着
してなる本発明のカバー材１と、ＥＶＡフィルム６とを
積層一体化してなるものである。As shown in FIG. 4, the sealing film 5 also serves as a cover material for a solar cell according to the present invention, in which a transparent and highly moisture-proof film 2 and a transparent and highly light-resistant film 3 are bonded with an adhesive containing an ultraviolet absorbent. The cover material 1 of the present invention and the EVA film 6 are laminated and integrated.
【００３１】この太陽電池用カバー材兼用封止膜５はＥ
ＶＡフィルム６の製造に当り、予め透明高防湿フィルム
２と透明高耐光フィルム３とを接着した本発明の太陽電
池用カバー材１を積層一体化することにより容易に製造
することができる。この場合のラミネート温度として
は、７５〜９０℃程度が適当である。The solar cell cover material / sealing film 5 is made of E
In manufacturing the VA film 6, the VA film 6 can be easily manufactured by laminating and integrating the solar cell cover material 1 of the present invention in which the transparent and highly moisture-proof film 2 and the transparent and highly light-resistant film 3 are bonded in advance. As the laminating temperature in this case, about 75 to 90 ° C. is appropriate.
【００３２】なお、このＥＶＡフィルム６の厚さは０．
１〜１ｍｍ程度であることが好ましい。The thickness of the EVA film 6 is set at 0.1.
It is preferably about 1 to 1 mm.
【００３３】本発明の太陽電池１０は、図５に示す如
く、この太陽電池用カバー材兼用封止膜５を用いて、バ
ックカバー７、ＥＶＡフィルム８、シリコン発電素子９
等の太陽電池用セル及び太陽電池用カバー材兼用封止膜
５の積層体を、常法に従って、真空ラミネーターで温度
１２０〜１５０℃、脱気時間２〜１５分、プレス圧力
０．５〜１ａｔｍ、プレス時間８〜４５分で加熱加圧圧
着することにより容易に製造することができる。As shown in FIG. 5, a solar cell 10 according to the present invention uses a back cover 7, an EVA film 8, a silicon power generation element 9
The laminated body of the solar cell and the solar cell cover material / sealing film 5 is subjected to a conventional method by a vacuum laminator at a temperature of 120 to 150 ° C., a deaeration time of 2 to 15 minutes, and a press pressure of 0.5 to 1 atm. It can be easily manufactured by pressurizing under pressure for 8 to 45 minutes.
【００３４】なお、本発明の太陽電池に用いられるＥＶ
Ａフィルムの製膜原料として好適なＥＶＡ樹脂組成物に
ついて以下に説明する。The EV used in the solar cell of the present invention
An EVA resin composition suitable as a raw material for forming the A film will be described below.
【００３５】本発明に係るＥＶＡ樹脂組成物には、耐候
性の向上のために架橋剤を配合して架橋構造を持たせる
が、この架橋剤としては、一般に、１００℃以上でラジ
カルを発生する有機過酸化物が用いられ、特に、配合時
の安定性を考慮に入れれば、半減期１０時間の分解温度
が７０℃以上であるものが好ましい。このような有機過
酸化物としては、例えば２，５−ジメチルヘキサン；
２，５−ジハイドロパーオキサイド；２，５−ジメチル
−２，５−ジ（ｔ−ブチルパーオキシ）ヘキサン；３−
ジ−ｔ−ブチルパーオキサイド；ｔ−ジクミルパーオキ
サイド；２，５−ジメチル−２，５−ジ（ｔ−ブチルパ
ーオキシ）ヘキシン；ジクミルパーオキサイド；α，
α’−ビス（ｔ−ブチルパーオキシイソプロピル）ベン
ゼン；ｎ−ブチル−４，４−ビス（ｔ−ブチルパーオキ
シ）ブタン；２，２−ビス（ｔ−ブチルパーオキシ）ブ
タン；１，１−ビス（ｔ−ブチルパーオキシ）シクロヘ
キサン；１，１−ビス（ｔ−ブチルパーオキシ）３，
３，５−トリメチルシクロヘキサン；ｔ−ブチルパーオ
キシベンゾエート；ベンゾイルパーオキサイド等を用い
ることができる。これらの有機過酸化物の配合量は、一
般にＥＶＡ樹脂１００重量部に対して５重量部以下、好
ましくは１〜３重量部である。The EVA resin composition according to the present invention has a cross-linking structure by blending a cross-linking agent for improving weather resistance. The cross-linking agent generally generates radicals at 100 ° C. or higher. Organic peroxides are used, and those having a decomposition temperature of 70 ° C. or more with a half-life of 10 hours are particularly preferable in consideration of stability at the time of compounding. Such organic peroxides include, for example, 2,5-dimethylhexane;
2,5-dihydroperoxide; 2,5-dimethyl-2,5-di (t-butylperoxy) hexane; 3-
Di-t-butyl peroxide; t-dicumyl peroxide; 2,5-dimethyl-2,5-di (t-butylperoxy) hexyne; dicumyl peroxide;
α'-bis (t-butylperoxyisopropyl) benzene; n-butyl-4,4-bis (t-butylperoxy) butane; 2,2-bis (t-butylperoxy) butane; 1,1- Bis (t-butylperoxy) cyclohexane; 1,1-bis (t-butylperoxy) 3,
3,5-trimethylcyclohexane; t-butylperoxybenzoate; benzoyl peroxide and the like can be used. The compounding amount of these organic peroxides is generally 5 parts by weight or less, preferably 1 to 3 parts by weight, based on 100 parts by weight of the EVA resin.
【００３６】また、太陽電池の封止膜として、発電素子
との接着力向上の目的で、ＥＶＡ樹脂にシランカップリ
ング剤を添加することができる。この目的に供されるシ
ランカップリング剤としては公知のもの、例えばγ−ク
ロロプロピルトリメトキシシラン；ビニルトリクロロシ
ラン；ビニルトリエトキシシラン；ビニル−トリス−
（β−メトキシエトキシ）シラン；γ−メタクリロキシ
プロピルトリメトキシシラン；β−（３，４−エトキシ
シクロヘキシル）エチルトリメトキシシラン；γ−グリ
シドキシプロピルトリメトキシシラン；ビニルトリアセ
トキシシラン；γ−メルカプトプロピルトリメトキシシ
ラン；γ−アミノプロピルトリメトキシシラン；Ｎ−β
−（アミノエチル）−γ−アミノプロピルトリメトキシ
シラン等を挙げることができる。これらのシランカップ
リング剤の配合量は、一般にＥＶＡ樹脂１００重量部に
対して５重量部以下、好ましくは０．１〜２重量部であ
る。As a sealing film for a solar cell, a silane coupling agent can be added to the EVA resin for the purpose of improving the adhesion to the power generating element. Known silane coupling agents for this purpose, for example, γ-chloropropyltrimethoxysilane; vinyltrichlorosilane; vinyltriethoxysilane; vinyl-tris-
(Β-methoxyethoxy) silane; γ-methacryloxypropyltrimethoxysilane; β- (3,4-ethoxycyclohexyl) ethyltrimethoxysilane; γ-glycidoxypropyltrimethoxysilane; vinyltriacetoxysilane; γ-mercapto Propyltrimethoxysilane; γ-aminopropyltrimethoxysilane; N-β
-(Aminoethyl) -γ-aminopropyltrimethoxysilane and the like. The amount of the silane coupling agent is generally 5 parts by weight or less, preferably 0.1 to 2 parts by weight, based on 100 parts by weight of the EVA resin.
【００３７】更に、ＥＶＡ樹脂のゲル分率を向上させ、
耐久性を向上するためにＥＶＡ樹脂に架橋助剤を添加す
ることができる。この目的に供される架橋助剤として
は、公知のものとしてトリアリルイソシアヌレート；ト
リアリルイソシアネート等の３官能の架橋助剤の他、Ｎ
Ｋエステル等の単官能の架橋助剤等も挙げることができ
る。これらの架橋助剤の配合量は、一般にＥＶＡ樹脂１
００重量部に対して１０重量部以下、好ましくは１〜５
重量部である。Further, the gel fraction of the EVA resin is improved,
A crosslinking aid can be added to the EVA resin to improve durability. Examples of the crosslinking auxiliary used for this purpose include known triaryl isocyanurate; trifunctional crosslinking auxiliary such as triallyl isocyanate;
Monofunctional crosslinking assistants such as K ester can also be mentioned. The amount of these crosslinking aids is generally equal to the amount of EVA resin 1
10 parts by weight or less, preferably 1 to 5 parts by weight with respect to 00 parts by weight
Parts by weight.
【００３８】更に、ＥＶＡ樹脂の安定性を向上する目的
でハイドロキノン；ハイドロキノンモノメチルエーテ
ル；ｐ−ベンゾキノン；メチルハイドロキノンなどを添
加することができ、これらの配合量は、一般にＥＶＡ樹
脂１００重量部に対して５重量部以下である。Further, for the purpose of improving the stability of the EVA resin, hydroquinone, hydroquinone monomethyl ether, p-benzoquinone, methylhydroquinone and the like can be added. The amount of these compounds is generally 100 parts by weight of the EVA resin. 5 parts by weight or less.
【００３９】更に、必要に応じ、上記以外に着色剤、紫
外線吸収剤、老化防止剤、変色防止剤等を添加すること
ができる。着色剤の例としては、金属酸化物、金属粉等
の無機顔料、アゾ系、フタロシアニン系、アヂ系、酸性
又は塩基染料系レーキ等の有機顔料がある。紫外線吸収
剤には、２−ヒドロキシ−４−オクトキシベンゾフェノ
ン；２−ヒドロキシ−４−メトキシ−５−スルフォベン
ゾフェノン等のベンゾフェノン系；２−（２’−ヒドロ
キシ−５−メチルフェニル）ベンゾトリアゾール等のベ
ンゾトリアゾール系；フェニルサルシレート；ｐ−ｔ−
ブチルフェニルサルシレート等のヒンダートアミン系が
ある。老化防止剤としては、アミン系；フェノール系；
ビスフェニル系；ヒンダートアミン系があり、例えばジ
−ｔ−ブチル−ｐ−クレゾール；ビス（２，２，６，６
−テトラメチル−４−ピペラジル）セバケート等があ
る。If necessary, a coloring agent, an ultraviolet absorber, an antioxidant, a discoloration inhibitor and the like can be added in addition to the above. Examples of the coloring agent include inorganic pigments such as metal oxides and metal powders, and organic pigments such as azo-based, phthalocyanine-based, azo-based, acidic or basic dye-based lakes. UV absorbers include 2-hydroxy-4-octoxybenzophenone; benzophenones such as 2-hydroxy-4-methoxy-5-sulfobenzophenone; 2- (2'-hydroxy-5-methylphenyl) benzotriazole; Benzotriazoles; phenyl salicylate; pt-
There are hindered amines such as butylphenyl salicylate. As anti-aging agents, amines; phenols;
Bisphenyl type; hindered amine type, for example, di-t-butyl-p-cresol; bis (2,2,6,6
-Tetramethyl-4-piperazyl) sebacate.
【００４０】[0040]
【発明の効果】以上詳述した通り、本発明の太陽電池用
カバー材は防湿性と耐光性とが共に良好な透明樹脂フィ
ルムであるため、この太陽電池用カバー材を太陽電池の
透明保護部材として用いることにより、柔軟な形状に対
応でき、軽量で耐衝撃性に優れ、紫外線劣化や発錆の問
題もなく耐久性に優れた太陽電池を提供することができ
る。As described in detail above, the cover material for a solar cell of the present invention is a transparent resin film having good moisture resistance and light resistance. By using such a solar cell, it is possible to provide a solar cell that can respond to a flexible shape, is lightweight, has excellent impact resistance, and has excellent durability without problems of ultraviolet deterioration and rusting.
【００４１】本発明の太陽電池用カバー材兼用封止膜
は、このような本発明の太陽電池用カバー材とＥＶＡフ
ィルムとを一体化してなるものであるため、この太陽電
池用カバー材兼用封止膜を用いることで、軽量で耐衝撃
性、耐久性に優れた太陽電池を良好な作業性のもとに効
率的に製造することができる。Since the solar cell cover / cumulative sealing film of the present invention is such that the solar cell cover / cumulative sealing film of the present invention and the EVA film are integrated, the solar cell cover / cumulative sealing film is also used. By using the blocking film, a lightweight solar cell having excellent impact resistance and durability can be efficiently manufactured based on good workability.
【００４２】本発明の太陽電池は、本発明の太陽電池用
カバー材を表面側及び／又は裏面側透明保護部材として
用いたものであり、柔軟な形状に対応でき、軽量で耐衝
撃性、耐久性に優れる。The solar cell of the present invention uses the cover material for a solar cell of the present invention as a transparent protective member on the front side and / or the back side, can respond to a flexible shape, is lightweight, has impact resistance and durability. Excellent in nature.
【図１】本発明の太陽電池用カバー材の実施の形態を示
す断面図である。FIG. 1 is a sectional view showing an embodiment of a solar cell cover material of the present invention.
【図２】本発明に係る透明高防湿フィルムの実施の形態
を示す断面図である。FIG. 2 is a cross-sectional view showing an embodiment of a transparent high moisture-proof film according to the present invention.
【図３】本発明に係る透明高防湿フィルムの実施の形態
を示す断面図である。FIG. 3 is a cross-sectional view showing an embodiment of a transparent high moisture-proof film according to the present invention.
【図４】本発明の太陽電池用カバー材兼用封止膜の実施
の形態を示す断面図である。FIG. 4 is a cross-sectional view showing an embodiment of a solar cell cover material / sealing film according to the present invention.
【図５】本発明の太陽電池の実施の形態を示す断面図で
ある。FIG. 5 is a sectional view showing an embodiment of a solar cell of the present invention.
【図６】従来の太陽電池を示す断面図である。FIG. 6 is a cross-sectional view showing a conventional solar cell.
１ 太陽電池用カバー材 ２ 透明高防湿フィルム ３ 透明高耐光フィルム ４ 紫外線吸収接着シート ５ 太陽電池用カバー材兼用封止膜 ６ ＥＶＡフィルム ７ バックカバー ８ ＥＶＡフィルム ９ シリコン発電素子 １０ 太陽電池 DESCRIPTION OF SYMBOLS 1 Cover material for solar cells 2 Transparent high moisture-proof film 3 Transparent high light-proof film 4 UV-absorbing adhesive sheet 5 Sealing film also used as cover material for solar cells 6 EVA film 7 Back cover 8 EVA film 9 Silicon power generation element 10 Solar cell
Claims (9)
いられるカバー材であって、透明高耐光フィルムと透明
高防湿フィルムとを、紫外線吸収剤を配合した接着剤で
積層一体化してなることを特徴とする太陽電池用カバー
材。1. A cover material used as a transparent protective member of a solar battery cell, wherein a transparent and highly light-resistant film and a transparent and highly moisture-proof film are laminated and integrated with an adhesive containing an ultraviolet absorbent. Characteristic cover material for solar cells.
ルムが、無機酸化物をコーティングした透明フィルムよ
りなることを特徴とする太陽電池用カバー材。2. The solar cell cover material according to claim 1, wherein the transparent high-moisture-proof film comprises a transparent film coated with an inorganic oxide.
ルムが、２枚の該透明フィルムのコーティング面同士を
貼り合わせてなる積層フィルムよりなることを特徴とす
る太陽電池用カバー材。3. The solar cell cover material according to claim 2, wherein the transparent high-moisture-proof film comprises a laminated film in which two coated surfaces of the transparent film are adhered to each other.
ムがポリエチレンテレフタレートフィルムであり、該無
機酸化物がシリカ又はアルミナであることを特徴とする
太陽電池用カバー材。4. The cover material for a solar cell according to claim 2, wherein said transparent film is a polyethylene terephthalate film, and said inorganic oxide is silica or alumina.
て、前記透明高耐光フィルムがフッ素樹脂フィルムであ
ることを特徴とする太陽電池用カバー材。5. The cover material for a solar cell according to claim 1, wherein the transparent light-resistant film is a fluororesin film.
テトラフルオロエチレン、４−フッ化エチレン−パーク
ロロアルコキシ共重合体、４−フッ化エチレン−６−フ
ッ化プロピレン共重合体、２−エチレン−４−フッ化エ
チレン共重合体、ポリ３−フッ化塩化エチレン、ポリフ
ッ化ビニリデン及びポリフッ化ビニルよりなる群から選
ばれる１種又は２種以上であることを特徴とする太陽電
池用カバー材。6. The fluororesin according to claim 5, wherein said fluororesin is polytetrafluoroethylene, 4-fluoroethylene-perchloroalkoxy copolymer, 4-fluoroethylene-6-propylenepropylene copolymer, 2-ethylene A solar cell cover material comprising one or more members selected from the group consisting of -4-fluoroethylene copolymer, poly (3-fluoroethylene chloride), polyvinylidene fluoride and polyvinyl fluoride.
て、透明高耐光フィルムがアクリル、ポリカーボネー
ト、ポリエチレンテレフタレート及びポリエチレンナフ
タレートよりなる１種又は２種以上の樹脂に紫外線吸収
剤を練り込んだ樹脂組成物を成膜してなることを特徴と
する太陽電池用カバー材。7. The transparent light-resistant film according to any one of claims 1 to 4, wherein an ultraviolet absorber is kneaded into one or more resins composed of acrylic, polycarbonate, polyethylene terephthalate and polyethylene naphthalate. A cover material for a solar cell, comprising a resin composition formed into a film.
封止膜であって、請求項１ないし７のいずれか１項に記
載の太陽電池用カバー材とエチレン−酢酸ビニル共重合
体フィルムとを積層一体化してなる太陽電池用カバー材
兼用封止膜。8. A solar cell cover material and an ethylene-vinyl acetate copolymer film according to claim 1, which is a sealing film also serving as a transparent protective member of the solar cell. And a sealing film that also serves as a cover material for solar cells.
に太陽電池用セルを封止してなる太陽電池において、該
表面側及び／又は裏面側保護部材が請求項１ないし７の
いずれか１項に記載される太陽電池用カバー材であるこ
とを特徴とする太陽電池。9. A solar cell in which a solar cell is sealed between a front side protection member and a back side protection member, wherein the front side and / or the back side protection member is any one of claims 1 to 7. A solar cell, which is the solar cell cover material according to claim 1.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34722598A JP3978911B2 (en) | 1998-12-07 | 1998-12-07 | Solar cell cover material, sealing film, and solar cell |
| ES99973354T ES2238877T3 (en) | 1998-12-07 | 1999-12-01 | SOLAR CELL COATING. |
| PCT/JP1999/006725 WO2000035025A1 (en) | 1998-12-07 | 1999-12-01 | Cover material for solar cell, sealing film and solar cell |
| EP99973354A EP1150357B1 (en) | 1998-12-07 | 1999-12-01 | Cover material for solar cell |
| DE69924025T DE69924025T2 (en) | 1998-12-07 | 1999-12-01 | COVER MATERIAL FOR SOLAR CELL |
| US09/800,526 US6441299B2 (en) | 1998-12-07 | 2001-03-08 | Covering member for solar battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34722598A JP3978911B2 (en) | 1998-12-07 | 1998-12-07 | Solar cell cover material, sealing film, and solar cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000174297A true JP2000174297A (en) | 2000-06-23 |
| JP3978911B2 JP3978911B2 (en) | 2007-09-19 |
Family
ID=18388780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34722598A Expired - Fee Related JP3978911B2 (en) | 1998-12-07 | 1998-12-07 | Solar cell cover material, sealing film, and solar cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3978911B2 (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000174298A (en) * | 1998-12-07 | 2000-06-23 | Bridgestone Corp | Solar cell, and cover material and seal film therefor |
| WO2007116688A1 (en) * | 2006-03-27 | 2007-10-18 | Daikin Industries, Ltd. | Multilayer body, solar cell surface protective sheet and building material sheet |
| EP2232575A2 (en) * | 2007-12-14 | 2010-09-29 | Miasole | Photovoltaic devices protected from environment |
| JP2012069769A (en) * | 2010-09-24 | 2012-04-05 | Fujifilm Corp | Polymer sheet for back sheet for solar battery and solar battery module |
| WO2013027948A2 (en) * | 2011-08-22 | 2013-02-28 | Kee Seung-Cheol | Solar power generation apparatus |
| JP2013522075A (en) * | 2010-03-12 | 2013-06-13 | サン−ゴバン パフォーマンス プラスティックス コーポレイション | Multilayer film for photovoltaic applications |
| JP2013522062A (en) * | 2009-03-03 | 2013-06-13 | イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー | Laminated polymer film and solar cell module made therefrom |
| JP2013531570A (en) * | 2010-07-02 | 2013-08-08 | スリーエム イノベイティブ プロパティズ カンパニー | Barrier assembly with encapsulant and photovoltaic cell |
| JP2013154640A (en) * | 2005-06-13 | 2013-08-15 | Three M Innovative Properties Co | Fluoropolymer containing laminate |
| JP2014528158A (en) * | 2011-07-06 | 2014-10-23 | ダウ グローバル テクノロジーズ エルエルシー | Optoelectronic device comprising a protective fluoropolymer composition |
| KR20180046169A (en) * | 2016-10-27 | 2018-05-08 | 한국에너지기술연구원 | Photovoltaic cell package and manufacturing method for the same |
| CN115401969A (en) * | 2022-08-12 | 2022-11-29 | 中天光伏材料有限公司 | Front film material and photovoltaic module |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000174298A (en) * | 1998-12-07 | 2000-06-23 | Bridgestone Corp | Solar cell, and cover material and seal film therefor |
| JP2013154640A (en) * | 2005-06-13 | 2013-08-15 | Three M Innovative Properties Co | Fluoropolymer containing laminate |
| WO2007116688A1 (en) * | 2006-03-27 | 2007-10-18 | Daikin Industries, Ltd. | Multilayer body, solar cell surface protective sheet and building material sheet |
| EP2232575A2 (en) * | 2007-12-14 | 2010-09-29 | Miasole | Photovoltaic devices protected from environment |
| EP2232575A4 (en) * | 2007-12-14 | 2012-07-11 | Miasole | Photovoltaic devices protected from environment |
| JP2013522062A (en) * | 2009-03-03 | 2013-06-13 | イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー | Laminated polymer film and solar cell module made therefrom |
| JP2013522075A (en) * | 2010-03-12 | 2013-06-13 | サン−ゴバン パフォーマンス プラスティックス コーポレイション | Multilayer film for photovoltaic applications |
| EP2544896A4 (en) * | 2010-03-12 | 2015-12-02 | Saint Gobain Performance Plast | Multilayer film for photovoltaic applications |
| JP2013531570A (en) * | 2010-07-02 | 2013-08-08 | スリーエム イノベイティブ プロパティズ カンパニー | Barrier assembly with encapsulant and photovoltaic cell |
| JP2013533819A (en) * | 2010-07-02 | 2013-08-29 | スリーエム イノベイティブ プロパティズ カンパニー | Barrier assembly |
| KR101875978B1 (en) * | 2010-07-02 | 2018-07-06 | 쓰리엠 이노베이티브 프로퍼티즈 컴파니 | Barrier assembly with encapsulant and photovoltaic cell |
| KR101913870B1 (en) | 2010-07-02 | 2018-10-31 | 쓰리엠 이노베이티브 프로퍼티즈 컴파니 | Barrier assembly |
| JP2012069769A (en) * | 2010-09-24 | 2012-04-05 | Fujifilm Corp | Polymer sheet for back sheet for solar battery and solar battery module |
| JP2014528158A (en) * | 2011-07-06 | 2014-10-23 | ダウ グローバル テクノロジーズ エルエルシー | Optoelectronic device comprising a protective fluoropolymer composition |
| WO2013027948A3 (en) * | 2011-08-22 | 2013-04-18 | Kee Seung-Cheol | Solar power generation apparatus |
| WO2013027948A2 (en) * | 2011-08-22 | 2013-02-28 | Kee Seung-Cheol | Solar power generation apparatus |
| KR20180046169A (en) * | 2016-10-27 | 2018-05-08 | 한국에너지기술연구원 | Photovoltaic cell package and manufacturing method for the same |
| CN115401969A (en) * | 2022-08-12 | 2022-11-29 | 中天光伏材料有限公司 | Front film material and photovoltaic module |
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