JP3475486B2 - Amorphous silicon solar panel - Google Patents
Amorphous silicon solar panelInfo
- Publication number
- JP3475486B2 JP3475486B2 JP08851994A JP8851994A JP3475486B2 JP 3475486 B2 JP3475486 B2 JP 3475486B2 JP 08851994 A JP08851994 A JP 08851994A JP 8851994 A JP8851994 A JP 8851994A JP 3475486 B2 JP3475486 B2 JP 3475486B2
- Authority
- JP
- Japan
- Prior art keywords
- solar cell
- heat insulating
- amorphous silicon
- cell element
- insulating material
- 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.)
- Expired - Fee Related
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
- Y02E10/545—Microcrystalline silicon PV cells
-
- 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
- Y02E10/548—Amorphous silicon PV cells
Description
【０００１】[0001]
【産業上の利用分野】本発明は光照射による出力の劣化
現象を抑制することのできる非晶質シリコン系太陽電池
パネルに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an amorphous silicon solar cell panel capable of suppressing the deterioration of output due to light irradiation.
【０００２】[0002]
【従来の技術】非晶質半導体太陽電池は薄膜化が容易で
あることから、安価な太陽電池として実用化が期待され
ている。その中でも代表的な非晶質シリコン系太陽電池
は、低温で形成することが可能で、且つ基板の選択自由
度が高いことから、次世代の太陽電池として注目されて
いる。このような非晶質シリコン太陽電池は、透光性基
板上に透明導電膜／ｐ−ｉ−ｎ非晶質シリコン層／金属
電極層を順次堆積した積層体からなる太陽電池素子の裏
面側を、充填材やバックシートで封入して太陽電池パネ
ルを構成し、これにアルミウム等のフレームを取り付け
たモジュールとして屋外で設置使用されている。この太
陽電池パネルは、図６に示すように、透光性基板１上に
透明導電膜／ｐ−ｉ−ｎ非晶質シリコン層／金属電極層
を順次堆積した積層体からなる光電変換領域１５を設
け、さらにエチレンビニルアセテート（以下ＥＶＡと称
す）やポリビニルブチラール（以下ＰＶＢと称す）の充
填材１７で封入するとともに、テドラー等のバックシー
ト１９によって裏面を保護し、一方受光面側には接着材
３３を介して透光性を有するカバー部材３５を設けた構
造が一般的である。2. Description of the Related Art Since amorphous semiconductor solar cells can be easily thinned, they are expected to be put to practical use as inexpensive solar cells. Among them, a typical amorphous silicon solar cell is attracting attention as a next-generation solar cell because it can be formed at a low temperature and has a high degree of freedom in selecting a substrate. Such an amorphous silicon solar cell has a back surface side of a solar cell element composed of a laminated body in which a transparent conductive film / pin amorphous silicon layer / metal electrode layer are sequentially deposited on a transparent substrate. The solar cell panel is enclosed by a filler and a back sheet, and is installed and used outdoors as a module in which a frame such as aluminum is attached. As shown in FIG. 6, this solar cell panel has a photoelectric conversion region 15 composed of a laminated body in which a transparent conductive film / a pin amorphous silicon layer / a metal electrode layer are sequentially deposited on a transparent substrate 1. And a vinyl butyral (hereinafter EVA) or polyvinyl butyral (hereinafter PVB) filler 17 is enclosed and the back surface 19 is protected by a back sheet 19 such as Tedlar, while the light receiving surface is bonded. A general structure is one in which a translucent cover member 35 is provided via a material 33.
【０００３】[0003]
【発明が解決しようとする課題】非晶質シリコン太陽電
池は、上述のように多くの利点を有してはいるが、一方
でステブラーロンスキー効果（以下これを光劣化と称
す）という重大な問題点をも有している。これは太陽光
に暴露することによって、光電変換効率が約２５％程度
低下してしまう現象であり、光電変換層内で発生した電
子と正孔が再結合するときに発生するエネルギーによっ
て、準安定状態にある結合手が切断されて不結合手とな
り、電子や正孔の捕獲割合が増大することによるものと
考えられている。この光劣化を解決するために、従来か
ら種々の方法が提案されてきた。例えば太陽電池素子を
多層に設け、上層と下層とで電流バランスを取りながら
膜厚を薄くし、光電変換層内の電界強度を高めて前記捕
獲割合を低減せんとする方法などがその代表的なもので
ある。しかしながら、このような方法を用いても依然と
して光劣化は存在しており、根本的解決を見ていないの
が現状である。そしてこのような光劣化現象が、非晶質
シリコン太陽電池の屋外用途における実用化を遅らせる
一因となっている。Amorphous silicon solar cells have many advantages as described above, but on the other hand, they have a serious problem of the Stebler-Lonski effect (hereinafter referred to as photodegradation). It also has various problems. This is a phenomenon in which the photoelectric conversion efficiency is reduced by about 25% when exposed to sunlight, and is metastable due to the energy generated when electrons and holes generated in the photoelectric conversion layer recombine. It is considered that this is due to the fact that the bond in the state is broken and becomes a dangling bond, and the trap ratio of electrons and holes increases. In order to solve this photodegradation, various methods have been conventionally proposed. For example, a typical method is to provide solar cell elements in multiple layers, reduce the film thickness while keeping the current balance between the upper layer and the lower layer, and increase the electric field strength in the photoelectric conversion layer to reduce the trapping ratio. It is a thing. However, even if such a method is used, photodegradation still exists, and the current situation is that no fundamental solution has been found. And such a photodegradation phenomenon is one of the factors that delay the practical application of the amorphous silicon solar cell in outdoor applications.
【０００４】また一方で、光劣化によって低下した光電
変換効率は、８０℃〜９０℃以上の温度における熱処理
によって改善されることが知られており、３０℃の温度
上昇につき、約８％光劣化率が小さくなる。従って、太
陽電池の温度を上記温度に上昇させることができれば、
光劣化率は１０％以下まで改善することができる。さら
に、非晶質シリコン太陽電池の開放電圧の温度依存性
は、結晶系シリコン太陽電池の約半分であり、結晶系シ
リコン太陽電池に比べると、温度上昇による出力低下の
影響が少ない。例えば、結晶系シリコン太陽電池では、
１℃温度が上昇するとその最大出力電力は０．５〜０．
７％減少するが、非晶質シリコン太陽電池では、０．２
〜０．３％である。従って、非晶質シリコン太陽電池で
は、太陽電池温度を高温に保つことで、光劣化の改善効
果を十分に得ることができる。しかしながら、従来の太
陽電池パネルにおいては、使用中の素子温度を上記温度
以上に上昇させることは不可能であった。On the other hand, it is known that the photoelectric conversion efficiency lowered by photodegradation is improved by heat treatment at a temperature of 80 ° C. to 90 ° C. or higher, and about 8% photodegradation is caused by a temperature rise of 30 ° C. The rate becomes smaller. Therefore, if the temperature of the solar cell can be raised to the above temperature,
The photodegradation rate can be improved to 10% or less. Further, the temperature dependence of the open circuit voltage of the amorphous silicon solar cell is about half that of the crystalline silicon solar cell, and the influence of the output decrease due to the temperature rise is less than that of the crystalline silicon solar cell. For example, in crystalline silicon solar cells,
When the temperature rises by 1 ° C, the maximum output power becomes 0.5-0.
7% reduction, but 0.2 for amorphous silicon solar cells
~ 0.3%. Therefore, in the amorphous silicon solar cell, the effect of improving the photodegradation can be sufficiently obtained by keeping the solar cell temperature at a high temperature. However, in the conventional solar cell panel, it is impossible to raise the element temperature during use to the above temperature or higher.
【０００５】[0005]
【課題を解決するための手段】本発明は、このような光
劣化現象を抑制する非晶質シリコン系太陽電池パネル構
造を提供するものである。なお以下、本発明の説明で
は、透光基板上に光電変換領域となる非晶質シリコン系
半導体層を少なくとも形成し、必要に応じて裏面側を充
填材およびバックシートの少なくともいずれかで封入し
た状態のものを太陽電池素子と称し、この太陽電池素子
に断熱材を密着させたものを太陽電池パネルと表現する
ものとする。そしてこのような本発明は、透光基板上に
非晶質シリコン系半導体層を形成した太陽電池素子の受
光面とは反対側の面に、断熱材を密着させた太陽電池パ
ネルであって、断熱材を２層構造とし、第１の断熱材を
太陽電池素子の受光面とは反対側の面に接着し、第１お
よび第２の断熱材間に防水シートを介在させた状態で両
断熱材を密着させた非晶質シリコン系太陽電池パネルと
することを、その特徴としている。また、太陽電池素子
からの出力線を、前記第１の断熱材を貫通し、前記防水
シートを貫通することなく配線してなることが効果的で
ある。さらに、第１および第２の断熱材間の境界を傾斜
させ、出力線の部分への水分の侵入を防止してなること
も好ましい。加えて、透光性を有するカバー部材を、太
陽電池素子の受光面側に太陽電池素子との間に間隙をあ
けて設けたり、このカバー部材を、太陽電池素子の受光
面側に太陽電池素子と密着状態で設けると、太陽電池パ
ネルの保護機能となる。SUMMARY OF THE INVENTION The present invention provides an amorphous silicon solar cell panel structure which suppresses such a photodegradation phenomenon. In the following description of the present invention, at least an amorphous silicon-based semiconductor layer to be a photoelectric conversion region is formed on a translucent substrate, and the back surface side is sealed with at least one of a filler and a back sheet as needed. The solar cell element in this state is referred to as a solar cell element, and the solar cell element in which a heat insulating material is adhered to the solar cell element is referred to as a solar cell panel. And such invention, the surface opposite to the light receiving surface of the solar cell element formed of an amorphous silicon-based semiconductor layer on a translucent substrate, a solar cell path which is brought into close contact insulation
It is a flannel and has a two-layer structure for the heat insulating material, and the first heat insulating material is
Adhere to the surface opposite to the light receiving surface of the solar cell element,
And the second heat insulating material with a waterproof sheet interposed
The feature is that it is an amorphous silicon solar cell panel in which a heat insulating material is adhered . In addition, solar cell element
The output wire from the first insulation through the waterproof
It is effective to wire without penetrating the sheet . Furthermore , the boundary between the first and second heat insulating materials is inclined.
To prevent water from entering the output line.
Is also preferable . In addition, a translucent cover member may be provided on the light receiving surface side of the solar cell element with a gap between the solar cell element and the cover member, or the cover member may be provided on the light receiving surface side of the solar cell element. When it is provided in close contact with the solar cell panel, it has a protective function.
【０００６】[0006]
【作用】本発明は上述のような構成を有し、太陽電池パ
ネルとして、透光基板上に非晶質シリコン系半導体層を
形成した太陽電池素子の受光面とは反対側の面に、断熱
材を密着させた構造は、太陽電池パネルによって吸収さ
れた熱がパネルの裏面側からすぐに放熱することがなく
なり、太陽電池パネルの温度を、光劣化を回復させるに
足りる温度範囲に維持することになる。そして、上記構
成において太陽電池素子と断熱材との間に防水シートを
介装し、防水シートを介在させた状態で太陽電池素子と
断熱材とを密着させた構造は、太陽電池パネル自身の防
水性能を高めることにつながる。さらにこの断熱材を２
層構造とし、第１の断熱材を太陽電池素子の受光面とは
反対側の面に接着し、第１および第２の断熱材間に防水
シートを介在させた状態で両断熱材を密着させると、２
つの断熱材間に部分的に間隙を設けることができ、配線
等のスペースを提供することができる。加えて、太陽電
池素子の受光面側に設けた透光性を有するカバー部材
は、太陽電池パネルの保護機能を与える。The present invention has the above-described structure, and as a solar cell panel, heat insulation is provided on the surface opposite to the light receiving surface of the solar cell element in which an amorphous silicon semiconductor layer is formed on a transparent substrate. The structure in which the materials are in close contact with each other prevents the heat absorbed by the solar cell panel from immediately radiating from the back side of the panel, and keeps the temperature of the solar cell panel within a temperature range sufficient to recover photodegradation. become. Further, in the above structure, a waterproof sheet is interposed between the solar cell element and the heat insulating material, and the structure in which the solar cell element and the heat insulating material are brought into close contact with each other with the waterproof sheet interposed is the waterproof of the solar cell panel itself. It will lead to higher performance. 2 more of this insulation
It has a layered structure, the first heat insulating material is adhered to the surface of the solar cell element opposite to the light receiving surface, and both heat insulating materials are brought into close contact with each other with a waterproof sheet interposed between the first and second heat insulating materials. And 2
A gap can be partially provided between the two heat insulating materials, and a space for wiring or the like can be provided. In addition, the translucent cover member provided on the light receiving surface side of the solar cell element provides a function of protecting the solar cell panel.
【０００７】[0007]
【実施例】以下、具体的実施例に基づき、本発明の詳細
を説明する。図１には、本発明の太陽電池パネルを用い
たモジュールの、代表的な構造例を示している。図例の
ものは、透光基板１上に非晶質シリコン系半導体層を形
成した太陽電池素子５の受光面とは反対側の面に、断熱
材７を密着させた太陽電池パネル９を、ブチルゴム１１
を用いて、アルミニウム製のフレーム１３に嵌入接着し
たものである。透光基板１としては強化ガラスや貼り合
わせガラス、またはその他一般的な透光基板が用いら
れ、ガラス成分が溶出しないよう、必要に応じて酸化ケ
イ素などを被着したものを用いても良い。太陽電池素子
５としては、例えば図２に示すように、透光基板１上に
透明導電膜／ｐ−ｉ−ｎまたはｎ−ｉ−ｐの非晶質シリ
コン層／金属電極層を順次堆積した積層体からなる光電
変換領域１５を形成し、その裏面側をＥＶＡ、ＰＶＢ、
ポリイソブチレン系樹脂等の充填材１７によって封入
し、さらに必要に応じてアルミニウム箔をサンドイッチ
したテドラー等のバックシート１９で裏面を保護する構
造としておく。EXAMPLES The present invention will be described in detail below with reference to specific examples. FIG. 1 shows a typical structural example of a module using the solar cell panel of the present invention. In the example shown in the figure, a solar cell panel 9 in which a heat insulating material 7 is adhered to the surface opposite to the light receiving surface of the solar cell element 5 having an amorphous silicon semiconductor layer formed on the transparent substrate 1 is provided. Butyl rubber 11
It is fitted and adhered to the aluminum frame 13 using. As the translucent substrate 1, a tempered glass, a laminated glass, or other general translucent substrate is used, and a substrate to which silicon oxide or the like is adhered may be used as necessary so that the glass component is not eluted. As the solar cell element 5, for example, as shown in FIG. 2, a transparent conductive film / a p-i-n or a n-i-p amorphous silicon layer / a metal electrode layer is sequentially deposited on the transparent substrate 1. The photoelectric conversion region 15 made of a laminated body is formed, and the back surface side thereof is EVA, PVB,
A backing sheet 19 such as a Tedlar sandwiched with an aluminum foil is used to protect the back surface by enclosing it with a filler 17 such as polyisobutylene resin.
【０００８】ここで透明導電膜としては、従来の太陽電
池素子と同様に酸化錫や酸化インジウム錫が用いられ、
非晶質シリコン層としては、アモルファスシリコンカー
バイトとアモルファスシリコンによるヘテロ接合構造が
採用され、必要に応じて透明導電膜側や金属電極層側の
ｐ層やｎ層を、微結晶化させることも直列抵抗低減にお
いて効果的である。また、金属電極層としては、クロ
ム、アルミニウム、銀などの一般的な金属材料を、単層
や積層構造として用いる。そして特に素子温度が高温に
なることから、非晶質シリコン層との間での金属成分の
拡散を防止するため、非晶質シリコン層と金属電極層と
の間に、前述の透明導電膜やシリサイド層などによる金
属拡散防止層を介在させたり、この金属拡散防止層を介
在させずに、金属電極層としてクロムやモリブデンなど
のシリサイド形成金属を用いたり、これらシリサイド形
成金属と他の金属との積層構造とすることが効果的であ
る。また、入射光の閉じ込め効果の点からは、反射率の
点から銀を用いると特に効果が高い。さらに、充填材１
７としてＥＶＡ、ＰＶＢなどを用いる場合は、真空ラミ
ネート法によって封入し、ポリイソブチレン系樹脂の場
合は、これを加熱流動化して塗布すれば良い。As the transparent conductive film, tin oxide or indium tin oxide is used as in the conventional solar cell element.
As the amorphous silicon layer, a heterojunction structure composed of amorphous silicon carbide and amorphous silicon is adopted, and the p layer and the n layer on the transparent conductive film side or the metal electrode layer side may be microcrystallized if necessary. It is effective in reducing series resistance. As the metal electrode layer, a general metal material such as chromium, aluminum or silver is used as a single layer or a laminated structure. And since the element temperature becomes high in particular, in order to prevent the diffusion of the metal component between the amorphous silicon layer and the amorphous silicon layer, between the amorphous silicon layer and the metal electrode layer, the above-mentioned transparent conductive film or A metal diffusion preventing layer such as a silicide layer is interposed, or a silicide forming metal such as chromium or molybdenum is used as the metal electrode layer without interposing the metal diffusion preventing layer. A laminated structure is effective. Further, in terms of the effect of confining incident light, silver is particularly effective in terms of reflectance. Furthermore, the filler 1
When EVA, PVB or the like is used as 7, a vacuum laminating method is used for encapsulation, and in the case of a polyisobutylene resin, this is heated and fluidized for application.
【０００９】そして図１に示すように、太陽電池素子５
と断熱材７との間に防水シート２１を介装し、防水シー
ト２１を介在させた状態で太陽電池素子５と断熱材７と
を密着させることで、太陽電池パネル９自身の防水性能
を向上させることができる。この断熱材７の材料として
は、断熱性、保温性、蓄熱性に優れた、例えばポリスチ
レンフォーム、ポリエチレンフォーム、硬質ポリウレタ
ンフォーム、軟質ポリウレタンフォーム、硬質塩化ビニ
ルフォーム、ユリアフォーム、フェノールフォーム、ラ
バーフォーム、ポリプロピレン、ポリエチレンテレフタ
レート、パーライト、バーミキュライト、泡ガラスなど
の発泡・多孔質材料や、アスベスト、ロックウール、グ
ラスウール、セラミックファイバー、動植物繊維、軟質
繊維材、炭素質繊維、チタン酸カリウム繊維などの繊維
材料や、ケイ酸カルシウム、塩基性炭酸マグネシウム、
けいそう土、けいそう土質断熱れんが、耐火断熱れん
が、キャスタブル耐火断熱材、コルク、炭素粉末などの
粒・粉状材料や、アルミニウム箔などからなる多層箔材
料や、硬質フォームラバー、発泡クロロプレンゴムなど
の発泡ゴム材料や、軽量気泡コンクリートや、発泡アル
ミニウムなどを用いることが可能であり、比較的硬質で
保形性を有し、軽量で加工性の良いものが適している。
また、防水シート２１の材料としては、特殊ゴム化アス
ファルトコンパウンドやポリイソブチレンなどを採用す
ることが好適であり、粘着材をコーティングしておくと
太陽電池素子５、防水シート２１、断熱材７との間の密
着固定が容易となる。なお、断熱材７が十分な防水機能
を有している場合は、防水シート２１は特に設けなくて
も良い。そして本図例においては、端子ボックス２３か
ら導出した出力線２５、２５は防水シート２１、断熱材
７を貫通した構造であるが、これとは別に、受光面内に
おいて防水シート２１を貫通しない構造として、続く図
３のものがある。As shown in FIG. 1, the solar cell element 5
A waterproof sheet 21 is interposed between the heat insulating material 7 and the heat insulating material 7, and the solar cell element 5 and the heat insulating material 7 are brought into close contact with each other with the waterproof sheet 21 interposed therebetween, thereby improving the waterproof performance of the solar cell panel 9 itself. Can be made. The material of the heat insulating material 7 is excellent in heat insulating property, heat retaining property and heat storage property, for example, polystyrene foam, polyethylene foam, rigid polyurethane foam, flexible polyurethane foam, rigid vinyl chloride foam, urea foam, phenol foam, rubber foam, Foamed / porous materials such as polypropylene, polyethylene terephthalate, perlite, vermiculite, and foam glass, and fiber materials such as asbestos, rock wool, glass wool, ceramic fibers, animal and vegetable fibers, soft fiber materials, carbon fibers, potassium titanate fibers, etc. , Calcium silicate, basic magnesium carbonate,
Diatomaceous earth, diatomaceous earth insulation bricks, fireproof insulation bricks, castable fireproof insulation materials, cork, granular and powder materials such as carbon powder, multi-layer foil materials made of aluminum foil, hard foam rubber, chloroprene rubber foam, etc. It is possible to use the foamed rubber material, light-weight cellular concrete, foamed aluminum, or the like, which is relatively hard and has a shape-retaining property, and which is lightweight and has good workability is suitable.
Further, as the material of the waterproof sheet 21, it is preferable to adopt a special rubberized asphalt compound, polyisobutylene, or the like. When the adhesive material is coated, the solar cell element 5, the waterproof sheet 21, and the heat insulating material 7 It becomes easy to fix them closely. If the heat insulating material 7 has a sufficient waterproof function, the waterproof sheet 21 may not be provided. In this example, the output lines 25 and 25 led out from the terminal box 23 have a structure that penetrates the waterproof sheet 21 and the heat insulating material 7, but separately from this, a structure that does not penetrate the waterproof sheet 21 in the light receiving surface. For example, there is the one shown in FIG.
【００１０】図３は、出力線２５、２５が防水シート２
１を貫通しない構造を示し、断熱材７を第１の断熱材２
７と第２の断熱材２９の２層構造とし、第１の断熱材２
７を太陽電池素子５の受光面とは反対側の面に接着する
とともに、第１および第２の断熱材２７、２９間に防水
シート２１を介在させた状態で、両断熱材２７、２９を
密着させている。そして２つの断熱材２７、２９間に間
隙部３１を設けておき、この間隙部３１に出力線２５、
２５を挿通させている。この構造では、出力線２５、２
５は受光面内において、第１の断熱材２７のみを貫通し
ている。従って、防水シート２１を、この間隙部３１に
おける第２の断熱材２９側に設けることで、出力線２
５、２５が防水シート２１を貫通することがなくなる。
また、図示するように、第１および第２の断熱材２７、
２９間の境界を必要に応じて傾斜させておくことで、出
力線２５の部分への水分の侵入を防止することができ
る。そして続く図４に示すように、出力線２５、２５を
太陽電池パネル９の一端側に引き出す為、上記間隙部３
１を一方向に延設し、この中を挿通させた出力線２５、
２５を太陽電池パネル９の一端側から取り出せば良い。
図例では、太陽電池パネル９をフレーム１３に固定する
ためのブチルゴム１１の部分において、第２の断熱材２
９を貫通させているが、フレーム１３を貫通させてフレ
ーム１３上に端子を取り付けても良く、本例に何ら限定
されるものではない。In FIG. 3, output lines 25 and 25 are waterproof sheets 2.
1 shows a structure that does not penetrate 1 and the heat insulating material 7 is replaced with the first heat insulating material 2
7 and the second heat insulating material 29 have a two-layer structure, and the first heat insulating material 2
7 is adhered to the surface of the solar cell element 5 opposite to the light receiving surface, and the two heat insulating materials 27, 29 are provided with the waterproof sheet 21 interposed between the first and second heat insulating materials 27, 29. It is in close contact. A gap 31 is provided between the two heat insulating materials 27 and 29, and the output line 25,
25 is inserted. In this structure, the output lines 25, 2
In the light receiving surface, 5 penetrates only the first heat insulating material 27. Therefore, by providing the waterproof sheet 21 on the side of the second heat insulating material 29 in the gap 31, the output line 2
5 and 25 will not penetrate the waterproof sheet 21.
In addition, as illustrated, the first and second heat insulating materials 27,
By inclining the boundary between the portions 29 as necessary, it is possible to prevent moisture from entering the portion of the output line 25. Then, as shown in the following FIG. 4, since the output lines 25, 25 are drawn out to one end side of the solar cell panel 9, the above-mentioned gap portion 3 is formed.
1 is extended in one direction, and the output wire 25 is inserted through this,
25 may be taken out from one end side of the solar cell panel 9.
In the illustrated example, at the portion of the butyl rubber 11 for fixing the solar cell panel 9 to the frame 13, the second heat insulating material 2
However, it is not limited to this example.
【００１１】そして本発明においても、必要に応じて前
述の図６に示したように、受光面側に接着材３３を介し
て、太陽電池素子５と密着状態で透光性を有するカバー
部材３５を設けておけば良い。またこれとは別に、カバ
ー部材３５を太陽電池素子との間に間隙をあけて設けて
も良い。この場合には、本図における接着材３３部分が
間隙となる。Also in the present invention, as shown in FIG. 6 described above, the cover member 35 which has a light transmitting property in the state of being in close contact with the solar cell element 5 via the adhesive 33 on the light receiving surface side, if necessary. Should be provided. Separately from this, the cover member 35 may be provided with a gap between it and the solar cell element. In this case, the adhesive 33 portion in the figure becomes a gap.
【００１２】このような本発明の太陽電池パネル９に、
フレーム１３を取り付けたモジュールを屋外に設置し、
その温度と光電変換効率の変化を調べたところ、従来で
あれば太陽電池パネルの温度は、夏期においては最高で
も気温より約３０℃の上昇に止まっていたものが、本発
明では気温に対して４０℃〜５０℃の上昇となり、夏期
において８０℃〜１００℃となった。これにより、従来
は約１５〜２５％の光劣化であったものが、本発明では
約９％となり、大きな改善効果が確認された。In the solar cell panel 9 of the present invention as described above,
Install the module with the frame 13 installed outdoors,
When the change in the temperature and the photoelectric conversion efficiency was investigated, the temperature of the solar cell panel in the past was only about 30 ° C. higher than the temperature in the summer, but in the present invention, the temperature was higher than the temperature in the present invention. The temperature increased by 40 ° C to 50 ° C and reached 80 ° C to 100 ° C in the summer. As a result, the conventional photo-deterioration was about 15 to 25%, but in the present invention, it was about 9%, and a large improvement effect was confirmed.
【００１３】また、本発明の太陽電池パネルは、図５に
示すようにフレーム１３を設けない構造とし、家屋等の
建築物の壁面パネルや屋根パネルとして使用することも
できる。この時も、図３のように２重構造の断熱材が使
用可能であることは、言うまでもないことである。The solar cell panel of the present invention can also be used as a wall panel or a roof panel of a building such as a house by having a structure without the frame 13 as shown in FIG. Needless to say, the heat insulating material having a double structure as shown in FIG. 3 can be used at this time as well.
【００１４】[0014]
【発明の効果】本発明は上述のような構成を有し、太陽
電池パネルとして、透光基板上に非晶質シリコン系半導
体層を形成した太陽電池素子の、受光面とは反対側の面
に断熱材を密着させ、さらに断熱材を２層構造とし、第
１の断熱材を太陽電池素子の受光面とは反対側の面に接
着し、第１および第２の断熱材間に防水シートを介在さ
せた状態で両断熱材を密着させた構造としたため、使用
中において太陽電池パネルによって吸収された熱がパネ
ルの裏面側からすぐに放熱することがなくなり、太陽電
池の温度を８０℃以上の高温に維持できることから、光
劣化現象を大幅に抑制することができ、出力の長期安定
性に優れたものとなり、さらに２つの断熱材間に部分的
に間隙を設けることができ、配線等のスペースを確保す
ることができる。そして、上記構成において太陽電池素
子からの出力線を、前記第１の断熱材を貫通し、前記防
水シートを貫通することなく配線したり、あるいは第１
および第２の断熱材間の境界を傾斜させ、出力線の部分
への水分の侵入を防止してなる構造としているので、本
太陽電池パネルを住宅の壁面や屋根に設置した場合で
も、裏面側への水分の侵入が無くなることから、住宅用
建材に要求される防水機能を十分はたせることになる。
このように本発明の太陽電池パネルは、出力の長期安定
性と防水機能を、高い水準で両立させることができるも
のとなる。EFFECT OF THE INVENTION The present invention has a structure as described above, and is a surface of a solar cell element having an amorphous silicon semiconductor layer formed on a transparent substrate as a solar cell panel, opposite to the light receiving surface. The heat insulating material is adhered to and the heat insulating material has a two-layer structure.
Attach the heat insulating material of 1 to the surface of the solar cell element opposite to the light receiving surface.
Wear a waterproof sheet between the first and second heat insulating materials.
Since both heat insulating materials are in close contact with each other while being kept in contact, the heat absorbed by the solar cell panel during use does not immediately dissipate from the back side of the panel, and the temperature of the solar cell is higher than 80 ° C. partially because it can maintain the photodegradation phenomenon can be significantly suppressed, Ri Do and excellent long-term stability of the output, further between the two heat insulator
A space can be provided to secure space for wiring etc.
You can Then, in the above configuration, the solar cell element
The output wire from the child through the first insulation and
Wiring without penetrating the water sheet, or first
And the slope of the boundary between the second insulation and the part of the output line
Since the structure prevents moisture from entering the housing, even if this solar cell panel is installed on the wall or roof of a house, water does not enter the back side, so it is required for building materials for houses. It will be fully waterproof.
As described above, the solar cell panel of the present invention can achieve both a long-term output stability and a waterproof function at a high level.
【図１】本発明の太陽電池パネルを用いた太陽電池モジ
ュールの構造例を表す断面説明図FIG. 1 is a sectional explanatory view showing a structural example of a solar cell module using a solar cell panel of the present invention.
【図２】本発明の太陽電池パネルに用いる太陽電池素子
の構造例を表す部分断面説明図FIG. 2 is a partial cross-sectional explanatory view showing a structural example of a solar cell element used in the solar cell panel of the present invention.
【図３】本発明の太陽電池パネルを用いた太陽電池モジ
ュールの別の構造例を表す断面説明図FIG. 3 is a sectional explanatory view showing another structural example of a solar cell module using the solar cell panel of the present invention.
【図４】図３の構造例における出力線の設置態様を表す
断面説明図FIG. 4 is a cross-sectional explanatory view showing an installation mode of output lines in the structural example of FIG.
【図５】本発明の太陽電池パネルの構造例を表す断面説
明図FIG. 5 is a cross-sectional explanatory view showing a structural example of the solar cell panel of the present invention.
【図６】太陽電池パネルの受光面側に透光性を有するカ
バー部材を設けた構造例を表す部分断面説明図FIG. 6 is a partial cross-sectional explanatory diagram showing a structural example in which a light-transmitting cover member is provided on the light-receiving surface side of a solar cell panel.
１ 透光基板 ５ 太陽電池素子 ７ 断熱材 ９ 太陽電池パネル １１ ブチルゴム １３ フレーム １５ 光電変換領域 １７ 充填材 １９ バックシート ２１ 防水シート ２３ 端子ボックス ２５ 出力線 ２７ 第１の断熱材 ２９ 第２の断熱材 ３１ 間隙部 ３３ 接着剤 ３５ カバー部材 1 Translucent substrate 5 Solar cell element 7 insulation 9 Solar panel 11 Butyl rubber 13 frames 15 Photoelectric conversion area 17 Filling material 19 back sheet 21 tarpaulin 23 terminal box 25 output lines 27 First insulation 29 Second insulation 31 Gap 33 adhesive 35 cover member
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平４−71276（ＪＰ，Ａ) 特開 昭63−34982（ＪＰ，Ａ) 特開 平１−100975（ＪＰ，Ａ) 特開 昭58−68989（ＪＰ，Ａ) 特開 昭63−178（ＪＰ，Ａ) 特開 平７−202230（ＪＰ，Ａ) 実開 昭63−106150（ＪＰ，Ｕ) 実開 昭59−168672（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) H01L 31/04 - 31/078 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-71276 (JP, A) JP-A 63-34982 (JP, A) JP-A 1-100975 (JP, A) JP-A 58- 68989 (JP, A) JP 63-178 (JP, A) JP 7-202230 (JP, A) Actually opened 63-106150 (JP, U) Actually opened 59-168672 (JP, U) (58) Fields investigated (Int.Cl. 7 , DB name) H01L 31/04-31/078
Claims (5)
形成した太陽電池素子の受光面とは反対側の面に、断熱
材を密着させた太陽電池パネルであって、断熱材を２層
構造とし、第１の断熱材を太陽電池素子の受光面とは反
対側の面に接着し、第１および第２の断熱材間に防水シ
ートを介在させた状態で両断熱材を密着させたことを特
徴とする非晶質シリコン系太陽電池パネル。1. A solar cell panel in which a heat insulating material is adhered to a surface of a solar cell element having an amorphous silicon semiconductor layer formed on a translucent substrate opposite to a light receiving surface thereof. Two layers
The structure is such that the first heat insulating material is opposite to the light receiving surface of the solar cell element.
Glue to the opposite side and keep the waterproof seal between the first and second insulation.
The feature is that both heat insulating materials are adhered to each other with the sheet interposed.
Amorphous silicon-based solar cell panel.
断熱材を貫通し、前記防水シートを貫通することなく配
線してなる請求項１記載の非晶質シリコン系太陽電池パ
ネル。2. An output line from the solar cell element is connected to the first line.
It penetrates through the heat insulating material and is distributed without penetrating the waterproof sheet.
The amorphous silicon solar cell panel according to claim 1, which is formed by lines .
せ、出力線の部分への水分の侵入を防止してなる請求項
２記載の非晶質シリコン系太陽電池パネル。3. Inclining the boundary between the first and second insulation materials.
And prevent invasion of water into the output line.
2. The amorphous silicon solar cell panel described in 2 .
子の受光面側に太陽電池素子との間に間隙をあけて設け
た請求項１〜３のいずれか１項に記載の非晶質シリコン
系太陽電池パネル。4. The amorphous material according to claim 1, wherein the cover member having a light-transmitting property is provided on the light-receiving surface side of the solar cell element with a gap between the cover element and the solar cell element. Quality silicon
System solar panel.
子の受光面側に太陽電池素子と密着状態で設けた請求項
１〜３のいずれか１項に記載の非晶質シリコン系太陽電
池パネル。5. The amorphous silicon-based sun according to claim 1, wherein the translucent cover member is provided on the light-receiving surface side of the solar cell element in close contact with the solar cell element. Battery panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08851994A JP3475486B2 (en) | 1994-04-26 | 1994-04-26 | Amorphous silicon solar panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08851994A JP3475486B2 (en) | 1994-04-26 | 1994-04-26 | Amorphous silicon solar panel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07297435A JPH07297435A (en) | 1995-11-10 |
| JP3475486B2 true JP3475486B2 (en) | 2003-12-08 |
Family
ID=13945083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08851994A Expired - Fee Related JP3475486B2 (en) | 1994-04-26 | 1994-04-26 | Amorphous silicon solar panel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3475486B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3674234B2 (en) * | 1997-04-18 | 2005-07-20 | 株式会社カネカ | Large solar cell module |
| US6525264B2 (en) | 2000-07-21 | 2003-02-25 | Sharp Kabushiki Kaisha | Thin-film solar cell module |
| EP2019435A3 (en) | 2007-07-23 | 2015-09-02 | Kaneka Corporation | Solar cell module |
-
1994
- 1994-04-26 JP JP08851994A patent/JP3475486B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07297435A (en) | 1995-11-10 |
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