JP2002151712A - Rear surface sealing method of thin-film solar cell - Google Patents
Rear surface sealing method of thin-film solar cellInfo
- Publication number
- JP2002151712A JP2002151712A JP2000347919A JP2000347919A JP2002151712A JP 2002151712 A JP2002151712 A JP 2002151712A JP 2000347919 A JP2000347919 A JP 2000347919A JP 2000347919 A JP2000347919 A JP 2000347919A JP 2002151712 A JP2002151712 A JP 2002151712A
- Authority
- JP
- Japan
- Prior art keywords
- thin
- bonding resin
- sealing
- back surface
- sheet
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Photovoltaic Devices (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は半導体薄膜太陽電池
に関し、特に、薄膜太陽電池の裏面封止方法に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a semiconductor thin film solar cell, and more particularly to a method for sealing the back surface of a thin film solar cell.
【０００２】[0002]
【従来の技術】図４と図５は、薄膜太陽電池における従
来の裏面封止方法を図解する模式的な断面部分図であ
る。なお、本願の各図において、厚さ、長さ、および幅
などは図面の明瞭化と簡略化のために適宜に変更されて
おり、実際の寸法関係を表わしてはいない。また、各図
において同一の参照符号は同一部分または相当する部分
を表わしている。2. Description of the Related Art FIGS. 4 and 5 are schematic cross-sectional partial views illustrating a conventional method of sealing a back surface in a thin-film solar cell. In the drawings of the present application, the thickness, length, width, and the like are appropriately changed for clarity and simplification of the drawings, and do not represent actual dimensional relationships. Further, in each drawing, the same reference numerals represent the same or corresponding parts.
【０００３】図４に示されているように、従来の薄膜太
陽電池の製造においては、一般に厚さ４ｍｍ程度の透明
なガラス基板１上に光電変換ユニット層２が形成され
る。光電変換ユニット層２は一般に数μｍ程度の非常に
薄い厚さを有し、基板１上に順に積層された透明導電性
酸化物の前面電極層、半導体光電変換層、および裏面金
属電極層を含んでいる。さらに、１つの基板上に複数の
サブモジュールを含む薄膜太陽電池では（特開２０００
−４９３６９参照）、たとえば厚さ約０．２ｍｍ程度の
銅箔などからなる電気的な内部配線５が配置される。こ
の内部配線５と光電変換ユニット層２との間には、局所
的な絶縁樹脂シート４が挿入される。このような絶縁シ
ート４としては、たとえば厚さ約０．０４ｍｍのＰＶＦ
（ポリフッ化ビニル）膜が用いられ得る。光電変換ユニ
ット層２、絶縁樹脂シート４、および内部配線５のそれ
ぞれの間には、第１と第２の局所的接合樹脂シート３ａ
と３ｂが配置される。これらの接合樹脂シートとして
は、たとえば厚さ約０．６ｍｍで硬化剤を含むＥＶＡ
（エチレン酢酸ビニル共重合体）シートが用いられ得
る。さらに、内部配線５と光電変換ユニット層２の全領
域を覆うように全域接合樹脂シート３ｃと複合保護フィ
ルム６ａが封止保護手段として重ねられる。全域接合樹
脂シート３ｃも、局所的接合樹脂シート３ａ，３ｂと同
様の材料が用いられ得る。As shown in FIG. 4, in the production of a conventional thin-film solar cell, a photoelectric conversion unit layer 2 is generally formed on a transparent glass substrate 1 having a thickness of about 4 mm. The photoelectric conversion unit layer 2 generally has a very thin thickness of about several μm, and includes a front electrode layer, a semiconductor photoelectric conversion layer, and a back metal electrode layer of a transparent conductive oxide sequentially laminated on the substrate 1. In. Further, in a thin-film solar cell including a plurality of sub-modules on one substrate, see JP-A-2000-2000.
For example, electric internal wiring 5 made of copper foil or the like having a thickness of about 0.2 mm is arranged. A local insulating resin sheet 4 is inserted between the internal wiring 5 and the photoelectric conversion unit layer 2. As such an insulating sheet 4, for example, PVF having a thickness of about 0.04 mm is used.
A (polyvinyl fluoride) membrane may be used. Between each of the photoelectric conversion unit layer 2, the insulating resin sheet 4, and the internal wiring 5, a first and second local bonding resin sheet 3 a is provided.
And 3b are arranged. These joining resin sheets are, for example, EVA containing a curing agent having a thickness of about 0.6 mm.
(Ethylene vinyl acetate copolymer) sheets may be used. Furthermore, the entire area bonding resin sheet 3c and the composite protective film 6a are stacked as sealing protection means so as to cover the entire area of the internal wiring 5 and the photoelectric conversion unit layer 2. The same material as the local bonding resin sheets 3a and 3b can be used for the entire area bonding resin sheet 3c.
【０００４】こうして準備された図４の積層体は、真空
ラミネータの熱板上に載せられ、そのラミネータは真空
排気される。そして、接合樹脂シート３ａ，３ｂ，３ｃ
の溶融後において、ラミネータ内のダイヤフラムによっ
て複合保護フィルム６ａが押圧される。そのとき、封止
樹脂フィルム６ａは柔軟性を有しているので、図５に示
されているように、絶縁樹脂シート４と内部配線５が配
置された近傍のわずかな凸部で少し湾曲してその凸部に
馴染むことができる。[0004] The laminate of FIG. 4 thus prepared is placed on a hot plate of a vacuum laminator, and the laminator is evacuated. Then, the joining resin sheets 3a, 3b, 3c
After melting, the composite protective film 6a is pressed by the diaphragm in the laminator. At this time, since the sealing resin film 6a has flexibility, as shown in FIG. 5, the sealing resin film 6a is slightly curved at a slight convex portion near where the insulating resin sheet 4 and the internal wiring 5 are arranged. It can fit into the convex part.
【０００５】この状態で、溶融した接合樹脂層３の硬化
は、真空ラミネータ内で完全に行なわしめることも可能
である。しかし、真空ラミネータは高価でありかつ同時
に多数枚の薄膜太陽電池を処理できないので、接合樹脂
層３が部分的に硬化した段階で薄膜太陽電池が真空ラミ
ネータから取出され、接合樹脂層３の完全な硬化は複数
枚の薄膜太陽電池を別途の硬化炉で同時に処理すること
によって行なわれるのが一般的である。In this state, the molten bonding resin layer 3 can be completely cured in a vacuum laminator. However, since the vacuum laminator is expensive and cannot process a large number of thin film solar cells at the same time, the thin film solar cell is removed from the vacuum laminator when the bonding resin layer 3 is partially cured, and the complete bonding resin layer 3 is completely removed. Curing is generally performed by simultaneously treating a plurality of thin film solar cells in a separate curing furnace.
【０００６】なお、封止保護手段の形成のために真空ラ
ミネータが利用される理由は、溶融させられた後に硬化
させられる封止樹脂層３の境界や内部に気泡が混入する
ことを防止するためである。The reason why the vacuum laminator is used to form the sealing protection means is to prevent air bubbles from entering the boundary and inside of the sealing resin layer 3 which is cured after being melted. It is.
【０００７】[0007]
【発明が解決しようとする課題】図４と図５に示されて
いるような従来の封止方法による薄膜太陽電池におい
て、保護フィルム６ａとしては、一般にアルミ箔をＰＶ
Ｆ膜でサンドイッチした複合フィルムが用いられる。こ
こで、アルミ箔がサンドイッチされているのは、水分の
透過を効果的に阻止するためである。ところが、このア
ルミ箔をサンドイッチしているＰＶＦ膜は薄いので、場
合によってピンホールや傷が発生し、太陽電池の裏面に
おいてアルミ箔を介するリーク電流を生じることがあ
る。また、水分の存在下においてこのようなリーク電流
が流れれば、アルミ箔の腐食が進行することがある。In a thin film solar cell according to the conventional sealing method as shown in FIGS. 4 and 5, an aluminum foil is generally used as the protective film 6a.
A composite film sandwiched between F films is used. Here, the reason why the aluminum foil is sandwiched is to effectively prevent the permeation of moisture. However, since the PVF film sandwiching the aluminum foil is thin, pinholes and scratches may occur in some cases, and a leak current via the aluminum foil may occur on the back surface of the solar cell. If such a leak current flows in the presence of moisture, corrosion of the aluminum foil may progress.
【０００８】このような従来技術における課題に鑑み、
本発明は、より信頼性の高い薄膜太陽電池の裏面封止方
法を提供することを目的としている。In view of such problems in the prior art,
An object of the present invention is to provide a more reliable method of sealing the back surface of a thin-film solar cell.
【０００９】[0009]
【課題を解決するための手段】本発明の１つの態様によ
る薄膜太陽電池の裏面封止方法においては、ガラス基板
上に形成された薄膜光電変換ユニット層の裏面上に、局
所的な接合樹脂シート、その上の不織布からなる絶縁シ
ート、その上の内部電気配線用金属箔、および薄膜光電
変換ユニット層の裏面全域を覆う全域接合樹脂シートと
封止ガラス板を順に重ねた積層体を用意し、この積層体
を真空ラミネータの熱板の上に載せて真空排気し、接合
樹脂シートの溶融後においてラミネータ内のダイヤフラ
ムによって封止ガラス板を押圧し、最終的に接合樹脂を
硬化させることを特徴としている。不織布としては、ガ
ラス繊維または合成繊維が好ましく用いられ得る。According to one aspect of the present invention, there is provided a method of sealing a back surface of a thin-film solar cell, wherein a local bonding resin sheet is formed on a back surface of a thin-film photoelectric conversion unit layer formed on a glass substrate. An insulating sheet made of a non-woven fabric thereon, a metal foil for internal electric wiring thereon, and a laminated body in which a whole area bonding resin sheet and a sealing glass plate covering the entire back surface of the thin film photoelectric conversion unit layer are prepared in order, This laminated body is placed on a hot plate of a vacuum laminator and evacuated, and after the joining resin sheet is melted, the sealing glass plate is pressed by a diaphragm in the laminator, and finally the joining resin is cured. I have. As the nonwoven fabric, glass fibers or synthetic fibers can be preferably used.
【００１０】本発明のもう一つの態様による薄膜太陽電
池の裏面封止方法においては、ガラス基板上に形成され
た薄膜光電変換ユニット層の裏面上に、両面が接合樹脂
でコーティングされた局所的な絶縁樹脂シート、その上
の内部電気配線用金属箔、および薄膜光電変換ユニット
層の裏面全域を覆う全域接合樹脂シートと封止ガラス板
を順に重ねた積層体を用意し、この積層体を真空ラミネ
ータの熱板上に載せて真空排気し、接合樹脂の溶融後に
おいてラミネータ内のダイヤフラムによって封止ガラス
板を押圧し、最終的に接合樹脂を硬化させることを特徴
としている。In a method for sealing the back surface of a thin film solar cell according to another aspect of the present invention, a local back surface coated with a bonding resin on both surfaces on a back surface of a thin film photoelectric conversion unit layer formed on a glass substrate. Prepare a laminated body in which an insulating resin sheet, a metal foil for internal electric wiring thereon, and a whole area bonding resin sheet covering the entire back surface of the thin film photoelectric conversion unit layer and a sealing glass plate are sequentially laminated, and this laminated body is subjected to a vacuum laminator. After the bonding resin is melted, the sealing glass plate is pressed by a diaphragm in the laminator after the melting of the bonding resin, and the bonding resin is finally cured.
【００１１】[0011]
【発明の実施の形態】アルミ箔をＰＶＦ膜でサンドイッ
チした複合保護フィルム６ａを利用して薄膜太陽電池の
裏面を封止する従来の方法における前述の課題に鑑み、
本発明者は、その複合保護フィルム６ａの代わりに厚さ
３〜４ｍｍ程度の保護ガラス板を利用する封止方法を検
討した。なぜならば、ガラス板は複合保護フィルム６ａ
に比べてはるかに丈夫であり、水分の透過に対しても優
れた阻止能力を有しているからである。DESCRIPTION OF THE PREFERRED EMBODIMENTS In view of the above-mentioned problems in the conventional method of sealing the back surface of a thin-film solar cell using a composite protective film 6a in which an aluminum foil is sandwiched between PVF films,
The present inventors have studied a sealing method using a protective glass plate having a thickness of about 3 to 4 mm instead of the composite protective film 6a. Because the glass plate is a composite protective film 6a
This is because they are much more durable and have an excellent ability to block moisture permeation.
【００１２】そこで本発明者は、まず、模式的な断面部
分図である図１に図解されているような薄膜太陽電池の
裏面封止方法を試みた。この図１の封止方法において
は、複合保護フィルム６ａの代わりに厚さ３ｍｍの封止
ガラス板６ｂが用いられたことのみにおいて、図４の方
法と異なっていた。Therefore, the present inventor first tried a method for sealing the back surface of a thin-film solar cell as illustrated in FIG. 1 which is a schematic sectional partial view. The sealing method of FIG. 1 differs from the method of FIG. 4 only in that a sealing glass plate 6b having a thickness of 3 mm is used instead of the composite protective film 6a.
【００１３】すなわち、図１の場合において、厚さ４ｍ
ｍのガラス基板１上に形成された厚さ数μｍの薄膜光電
変換ユニット層２上に、厚さ０．６ｍｍの第１の局所的
接合ＥＶＡシート３ａ、厚さ０．０４ｍｍの絶縁ＰＶＦ
シート４、厚さ０．６ｍｍの第２の局所的接合ＥＶＡシ
ート３ｂ、厚さ０．２ｍｍの内部配線用銅箔５、厚さ
０．６ｍｍの全域接合ＥＶＡシート３ｃ、そして保護フ
ィルム６ａに代わる保護ガラス板６ｂが順次に積層され
た。That is, in the case of FIG.
The first locally bonded EVA sheet 3a having a thickness of 0.6 mm and the insulating PVF having a thickness of 0.04 mm are formed on a thin film photoelectric conversion unit layer 2 having a thickness of several μm formed on a glass substrate 1 having a thickness of m.
Sheet 4, a second locally bonded EVA sheet 3b having a thickness of 0.6 mm, a copper foil 5 for internal wiring having a thickness of 0.2 mm, a full-area bonded EVA sheet 3c having a thickness of 0.6 mm, and a protective film 6a The protective glass plates 6b were sequentially laminated.
【００１４】ところが、薄膜太陽電池の裏面封止のため
に保護フィルム６ａの代わりに保護ガラス板６ｂを利用
した場合には、別の付随的な問題が生じることが判明し
た。これは、保護ガラス板６ｂが保護フィルム６ａに比
べて剛性が高いことから生じる問題である。However, it has been found that when the protective glass plate 6b is used instead of the protective film 6a for sealing the back surface of the thin-film solar cell, another incidental problem occurs. This is a problem caused by the fact that the protective glass plate 6b has higher rigidity than the protective film 6a.
【００１５】すなわち、図４の場合と同様に真空ラミネ
ータを利用して図１の積層体を封止した場合、封止ガラ
ス板６ｂは、複合保護フィルム６ａに比べて剛性が高い
ので、第１と第２の局所的接合樹脂シート３ａと３ｂと
ともに絶縁シート４と内部配線５が配置されたわずかな
凸部に馴染んで湾曲することが困難である。その結果と
して、図２に示されているように、わずかな凸部を形成
する絶縁シート４と内部配線５との近傍において、硬化
された接合樹脂層３中に気泡７が残留しやすくなること
がわかった。That is, when the laminate of FIG. 1 is sealed using a vacuum laminator as in the case of FIG. 4, the sealing glass plate 6b has higher rigidity than the composite protective film 6a. In addition, it is difficult to bend into a slight convex portion where the insulating sheet 4 and the internal wiring 5 are arranged together with the second local bonding resin sheets 3a and 3b. As a result, as shown in FIG. 2, bubbles 7 are likely to remain in the cured bonding resin layer 3 in the vicinity of the insulating sheet 4 and the internal wiring 5 that form a slight protrusion. I understood.
【００１６】そこで本発明者は、図１において各々が比
較的大きな厚さを有する第１と第２の局所的接合ＥＶＡ
シート３ａと３ｂを用いることなく、絶縁ＰＶＦシート
の代わりに厚さ０．０８ｍｍの絶縁ＰＥＴ（ポリエチレ
ンテレフタレート）シート４を用いて薄膜太陽電池の裏
面封止を試みた。その結果、図３に示されているよう
に、絶縁シート４と内部配線５との配置に伴うわずかな
凸状態が低減され、その凸部近傍であっても接合樹脂層
３中に残留気泡は観察されなかった。しかし、この場合
には、薄膜光電変換ユニット層２、絶縁シート４、およ
び内部配線用金属箔のそれぞれの間に接合樹脂３が含浸
せず、それぞれの間の接合が達成されなくて不安定にな
るという問題が生じた。The inventor has now found that in FIG. 1 the first and second local junctions EVA each having a relatively large thickness.
Without using the sheets 3a and 3b, an insulating PET (polyethylene terephthalate) sheet 4 having a thickness of 0.08 mm was used in place of the insulating PVF sheet to seal the back surface of the thin-film solar cell. As a result, as shown in FIG. 3, a slight convex state due to the arrangement of the insulating sheet 4 and the internal wiring 5 is reduced, and even in the vicinity of the convex part, residual bubbles remain in the bonding resin layer 3. Not observed. However, in this case, the bonding resin 3 is not impregnated between each of the thin-film photoelectric conversion unit layer 2, the insulating sheet 4, and the metal foil for internal wiring, and the bonding between them is not achieved, resulting in unstable operation. Problem.
【００１７】上述のように従来の封止複合保護フィルム
６ａの代わりに封止保護ガラス板６ｂを用いることに伴
って生ずる付随的な問題に鑑みて、本発明者がさらに検
討した結果、以下のような工夫を施すことによってそれ
らの付随的問題をも解消し得ることを見出した。As described above, the present inventor further studied in view of the incidental problem caused by using the sealing protective glass plate 6b instead of the conventional sealing composite protective film 6a. It has been found that such a contrivance can be solved by applying such a device.
【００１８】まず本発明者は、第１の工夫として、図１
において第１の局所的接合樹脂シート３ａとして厚さ
０．４ｍｍのＥＶＡシートを用いるとともに、絶縁シー
ト４として厚さ０．２ｍｍのガラス繊維不織布が用いら
れた。そして、第２の局所的接合樹脂シート３ｂが省略
された。First, the present inventor has proposed a first device as shown in FIG.
In Example 1, an EVA sheet having a thickness of 0.4 mm was used as the first local bonding resin sheet 3a, and a nonwoven glass fiber fabric having a thickness of 0.2 mm was used as the insulating sheet 4. Then, the second local bonding resin sheet 3b was omitted.
【００１９】このような工夫を施した積層体から真空ラ
ミネータを利用して裏面封止された薄膜太陽電池を作製
したところ、図３に示されているように、絶縁シート４
と内部配線５との配置に伴うわずかな凸状態が低減さ
れ、その凸部近傍であっても接合樹脂層３中に残留気泡
は観察されなかった。しかも、この場合には、第１の局
所的接合ＥＶＡシート３ａが溶融したときにガラス繊維
不織布４内に含浸し、その局所的ＥＶＡシート３ａの厚
さの影響が低減するとともに、薄膜光電変換ユニット層
２と不織布絶縁シート４との間のみならず不織布絶縁シ
ート４と金属箔５との間の安定な接合をも実現すること
ができた。A thin-film solar cell having a back-sealed surface was fabricated from the thus-developed laminate using a vacuum laminator. As shown in FIG.
The slight protruding state due to the arrangement of the wiring and the internal wiring 5 was reduced, and no residual air bubbles were observed in the bonding resin layer 3 even near the protruding portion. Moreover, in this case, when the first locally bonded EVA sheet 3a is melted, it is impregnated into the glass fiber nonwoven fabric 4, the influence of the thickness of the local EVA sheet 3a is reduced, and the thin-film photoelectric conversion unit is reduced. It was possible to realize not only stable bonding between the layer 2 and the nonwoven fabric insulating sheet 4 but also between the nonwoven fabric insulating sheet 4 and the metal foil 5.
【００２０】第２の工夫としては、図１において絶縁シ
ート４として両面がＥＶＡコーティングされたＰＥＴ絶
縁シートが用いられ、それは０．２ｍｍの厚さを有して
いた。そして、第１と第２の局所的接合樹脂シート３ａ
と３ｂが省略された。As a second contrivance, in FIG. 1, a PET insulating sheet coated with EVA on both sides was used as the insulating sheet 4 and had a thickness of 0.2 mm. Then, the first and second locally bonded resin sheets 3a
And 3b have been omitted.
【００２１】このような第２の工夫を施した積層体から
真空ラミネータを利用して裏面封止された薄膜太陽電池
においても、図３に示されているように、絶縁シート４
と内部配線５との配置に伴うわずかな凸状態が低減さ
れ、その凸部近傍であっても接合樹脂層３中に残留気泡
は観察されなかった。しかも、この場合には、ＰＥＴ絶
縁シート４の両面がＥＶＡによってコーティングされて
いたので、薄膜光電変換ユニット層２と絶縁シート４と
の間のみならずその絶縁シート４と金属箔５との間の安
定な接合をも実現することができた。As shown in FIG. 3, even in a thin-film solar cell in which the back surface is sealed by using a vacuum laminator from the laminated body subjected to the second contrivance, as shown in FIG.
The slight protruding state due to the arrangement of the wiring and the internal wiring 5 was reduced, and no residual air bubbles were observed in the bonding resin layer 3 even near the protruding portion. Moreover, in this case, since both surfaces of the PET insulating sheet 4 are coated with EVA, not only between the thin film photoelectric conversion unit layer 2 and the insulating sheet 4 but also between the insulating sheet 4 and the metal foil 5. Stable joining was also achieved.
【００２２】なお、上述の第１の工夫においては不織布
４としてガラス不織布を用いた例が説明されたが、その
他の合成繊維の不織布を用いても同様な効果を得ること
ができることは言うまでもない。In the first device described above, an example in which a glass non-woven fabric is used as the non-woven fabric 4 has been described. However, it is needless to say that similar effects can be obtained by using other synthetic fiber non-woven fabrics.
【００２３】また、以上において接合樹脂シートとして
硬化剤を含むＥＶＡシートを用いた例が説明されたが、
たとえば硬化剤を含むＰＶＢ（ポリビニルブチラール）
シートのように他の適当な接合樹脂シートをも用いるこ
とができる。In the above, an example using an EVA sheet containing a curing agent as the bonding resin sheet has been described.
For example, PVB (polyvinyl butyral) containing a curing agent
Other suitable bonding resin sheets, such as sheets, can also be used.
【００２４】さらに、上述の局所的接合シートの大きさ
は、望まれる場合には、光電変換ユニット層の裏面全域
を覆う大きさであってもよいことは言うまでもない。Further, needless to say, the size of the above-mentioned local bonding sheet may be a size that covers the entire back surface of the photoelectric conversion unit layer, if desired.
【００２５】[0025]
【発明の効果】以上のように、本発明によれば、従来に
比べて信頼性の高い薄膜太陽電池の裏面封止方法を提供
することができる。As described above, according to the present invention, it is possible to provide a method of sealing the back surface of a thin-film solar cell with higher reliability than the conventional one.
【図１】 保護ガラス板を用いて薄膜太陽電池の裏面を
封止する方法を図解する模式的な断面部分図である。FIG. 1 is a schematic cross-sectional partial view illustrating a method of sealing the back surface of a thin-film solar cell using a protective glass plate.
【図２】 図１に示された積層体を真空ラミネータを用
いて封止した結果の一例を示す模式的な断面部分図であ
る。FIG. 2 is a schematic sectional partial view showing an example of a result obtained by sealing the laminate shown in FIG. 1 using a vacuum laminator.
【図３】 図１中の局所的接合樹脂シート３ａと３ｂの
少なくとも一方を省略して薄膜太陽電池の裏面を封止し
た結果を示す模式的な断面部分図である。3 is a schematic sectional partial view showing a result of sealing a back surface of the thin film solar cell by omitting at least one of the local bonding resin sheets 3a and 3b in FIG. 1. FIG.
【図４】 従来の薄膜太陽電池の裏面封止方法を図解す
る模式的な断面部分図である。FIG. 4 is a schematic cross-sectional partial view illustrating a conventional method of sealing the back surface of a thin-film solar cell.
【図５】 図４に示された積層体を真空ラミネータで封
止した結果を示す模式的な断面部分図である。FIG. 5 is a schematic sectional partial view showing a result of sealing the laminate shown in FIG. 4 with a vacuum laminator.
１ ガラス基板、２ 光電変換ユニット層、３ 接合樹
脂層、３ａ，３ｂ 局所的接合樹脂シート、３ｃ 全域
接合樹脂シート、４ 局所的絶縁シート、５電気配線用
金属箔、６ａ 複合保護フィルム、６ｂ 保護ガラス
板。Reference Signs List 1 glass substrate, 2 photoelectric conversion unit layer, 3 bonding resin layer, 3a, 3b local bonding resin sheet, 3c entire bonding resin sheet, 4 local insulating sheet, 5 metal foil for electrical wiring, 6a composite protective film, 6b protection Glass plate.
Claims (3)
ユニット層の裏面上に、局所的な接合樹脂シート、その
上の不織布からなる絶縁シート、その上の内部電気配線
用金属箔、および前記薄膜光電変換ユニット層の裏面全
域を覆う全域接合樹脂シートと封止ガラス板を順に重ね
た積層体を用意し、 前記積層体を真空ラミネータの熱板の上に載せて真空排
気し、 前記接合樹脂シートの溶融後において前記ラミネータ内
のダイヤフラムによって前記封止ガラス板を押圧し、 最終的に前記接合樹脂を硬化させることを特徴とする薄
膜太陽電池の裏面封止方法。1. A local bonding resin sheet, an insulating sheet made of non-woven fabric thereon, a metal foil for internal electric wiring thereon, and a local bonding resin sheet on the back surface of the thin film photoelectric conversion unit layer formed on the glass substrate. A laminated body is prepared by sequentially stacking an entire area bonding resin sheet and a sealing glass plate covering the entire back surface of the thin film photoelectric conversion unit layer. The laminated body is placed on a hot plate of a vacuum laminator and evacuated. A method for sealing the back surface of a thin-film solar cell, comprising pressing the sealing glass plate with a diaphragm in the laminator after the sheet is melted, and finally curing the bonding resin.
からなる請求項１に記載の薄膜太陽電池の裏面封止方
法。2. The method according to claim 1, wherein the non-woven fabric is made of glass fiber or synthetic fiber.
ユニット層の裏面上に、両面が接合樹脂でコーティング
された局所的な絶縁樹脂シート、その上の内部電気配線
用金属箔、および前記薄膜光電変換ユニット層の裏面全
域を覆う全域接合樹脂シートと封止ガラス板を順に重ね
た積層体を用意し、 前記積層体を真空ラミネータの熱板上に載せて真空排気
し、 前記接合樹脂の溶融後において前記ラミネータ内のダイ
ヤフラムによって前記封止ガラス板を押圧し、 最終的に前記接合樹脂を硬化させることを特徴とする薄
膜太陽電池の裏面封止方法。3. A local insulating resin sheet coated on both sides with a bonding resin on a back surface of a thin film photoelectric conversion unit layer formed on a glass substrate, a metal foil for internal electric wiring thereon, and the thin film A laminated body is prepared by sequentially stacking a whole area bonding resin sheet and a sealing glass plate covering the entire back surface of the photoelectric conversion unit layer, placing the laminated body on a hot plate of a vacuum laminator and evacuating, and melting the bonding resin. A method of sealing the back surface of a thin-film solar cell, wherein the sealing glass plate is pressed by a diaphragm in the laminator later, and the bonding resin is finally cured.
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|---|---|---|---|
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000347919A JP4650971B2 (en) | 2000-11-15 | 2000-11-15 | Thin film solar cell backside sealing method |
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| JP4650971B2 JP4650971B2 (en) | 2011-03-16 |
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Cited By (3)
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| WO2008023795A1 (en) * | 2006-08-25 | 2008-02-28 | Sanyo Electric Co., Ltd. | Solar battery module and solar battery module manufacturing method |
| WO2013146414A1 (en) * | 2012-03-30 | 2013-10-03 | 凸版印刷株式会社 | Back contact solar cell module |
| CN103715285A (en) * | 2012-10-04 | 2014-04-09 | 凸版印刷株式会社 | Solar battery module |
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| JPH0883923A (en) * | 1994-09-13 | 1996-03-26 | Kanegafuchi Chem Ind Co Ltd | Solar cell module |
| JPH09135035A (en) * | 1995-11-08 | 1997-05-20 | Kanegafuchi Chem Ind Co Ltd | Manufacturing method for semiconductor device |
| JPH11238897A (en) * | 1998-02-23 | 1999-08-31 | Canon Inc | Solar cell module and manufacture thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008023795A1 (en) * | 2006-08-25 | 2008-02-28 | Sanyo Electric Co., Ltd. | Solar battery module and solar battery module manufacturing method |
| CN101506993B (en) * | 2006-08-25 | 2011-04-06 | 三洋电机株式会社 | Solar battery module and solar battery module manufacturing method |
| JP5213712B2 (en) * | 2006-08-25 | 2013-06-19 | 三洋電機株式会社 | Solar cell module and method for manufacturing solar cell module |
| KR101342281B1 (en) | 2006-08-25 | 2013-12-16 | 산요덴키가부시키가이샤 | Solar battery module and solar battery module manufacturing method |
| US9660120B2 (en) | 2006-08-25 | 2017-05-23 | Panasonic Intellectual Property Management Co., Ltd. | Solar cell module and solar cell module manufacturing method |
| US10043931B2 (en) | 2006-08-25 | 2018-08-07 | Panasonic Itellectual Property Management Co., Ltd. | Solar cell module and solar cell module manufacturing method |
| WO2013146414A1 (en) * | 2012-03-30 | 2013-10-03 | 凸版印刷株式会社 | Back contact solar cell module |
| CN104205356A (en) * | 2012-03-30 | 2014-12-10 | 凸版印刷株式会社 | Back contact type solar cell module |
| EP2833416A4 (en) * | 2012-03-30 | 2015-10-28 | Toppan Printing Co Ltd | Back contact solar cell module |
| CN103715285A (en) * | 2012-10-04 | 2014-04-09 | 凸版印刷株式会社 | Solar battery module |
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