JP2005109033A - 光増感型太陽電池及びその製造方法 - Google Patents
光増感型太陽電池及びその製造方法 Download PDFInfo
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- JP2005109033A JP2005109033A JP2003338563A JP2003338563A JP2005109033A JP 2005109033 A JP2005109033 A JP 2005109033A JP 2003338563 A JP2003338563 A JP 2003338563A JP 2003338563 A JP2003338563 A JP 2003338563A JP 2005109033 A JP2005109033 A JP 2005109033A
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- solar cell
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Images
Classifications
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- H01G9/20—Light-sensitive devices
- H01G9/2095—Light-sensitive devices comprising a flexible sustrate
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
【解決手段】 本発明は、傾斜壁面を有する溝を有する透明基板と、溝の傾斜壁面に設けられた金属からなる集電配線と、透明基板上の溝以外の領域に設けられた透明電極層と、透明電極層及び集電配線の上に設けられた半導体層と、半導体層上に設けられ、表面に色素が担持された半導体電極と、半導体電極に離間対向して配置され、表面に導電層を有する対向基板と、半導体電極と導電層との間に設けられ、ヨウ素分子及びヨウ化物を含む電解質とを有する電解質層とを具備することを特徴とする光増感型太陽電池を提供する。
【選択図】 図1
Description
、半導体層上に半導体電極を形成し、半導体電極に色素を担持させる工程と、対向基板の表面に導電層を形成する工程と、半導体電極を形成した透明基板と導電層を形成した対向基板とを対向させて配置し、ヨウ素分子及びヨウ化物を含む電解質を注入してから封止して電解質層を形成する工程とを具備することを特徴とする光増感型太陽電池の製造方法を提供する。
無機物としてはガラス、有機物としてはPETフィルム、アクリル基板などのプラスティック基板がある。プラスティック基板は、研磨などの平坦化が難しいことから、本実施形態がより有効であるといえる。
配線が凸状になっていても良く、溝を形成しなくてもよい。さらに、光利用効率などの観点から、透明基板8に設けられた集電配線7と対向基板1に設けられた集電配線とは同じパターンであることが好ましい。
ジメトキシエタン、およびジエトキシエタンなどの鎖状エーテル;アセトニトリル、プロピオニトリル、グルタロニトリル、およびメトキシプロピオニトリルなどのニトリル系溶剤などが挙げられる。こうした有機溶媒は、単独であるいは2種以上の混合物として用いることができる。
(実施例1)
図1に示すように、ポリエチレンテレフタレート《PET》樹脂からなる縦横20cm×15cm、厚み100μmの透明基板8上に、酸化スズ、酸化インジウム合金からなる透明導電性酸化膜(ITO)を透明電極層6として50nmの厚さとなるようスパッタにより成膜し、その上にポリビニルベンゼンを溶媒のキシレンに20%となるよう溶解したレジストをスピンコートで形成し、100℃で乾燥した。
リウムアイオダイドに、ヨウ化テトラプロピルアンモニウム0.5M、ヨウ化カリウム0.02Mおよびヨウ素0.2Mを溶解させて、電解質溶液(A)を調製した。この電解質溶液(A)10gに、Nを含有する化合物としてのポリ(4−ビニルピリジン)0.3g、および水を1.1g溶解させた。得られた溶液に、有機臭化物としての1,6−ジブロモヘキサン0.3gを溶解させることによって、ゲル電解質前駆体である電解質組成物を得た。次いで光電変換ユニットの開口部に電解質組成物を注入した。電解質組成物3はn型半導体電極4に浸透するとともに、n型半導体電極4と導電層2との間にも注入された。引き続き光電変換ユニットの開口部をエポキシ樹脂10で封口した後、60℃で30分間、ホットプレート上で加熱することにより、光電変換素子、すなわち光増感型太陽電池を製造した。
(実施例2)
溝加工用のダイヤモンドブレードの先端形状を、厚さ50μm、先端形状が図2に示すような階段状をなすダイヤモンドブレードを用いて透明基板8に溝加工を施す他は、実施例1と同様の材料、方法を用いて光増感型太陽電池を作製した。透明基板8上面と溝の階段状の断面との角度が略45度となるように加工した。
(実施例3)
溝加工用のダイヤモンドブレードの先端形状を、厚さ100μm、先端形状が図3に示すようなU字形状をなすダイヤモンドブレードを用いて透明基板8に溝加工を施す他は、実施例1と同様の材料、方法を用いて光増感型太陽電池を作製した。加工溝は最大深さ15μmとして、透明基板8上面と溝の端面の接線が形成する角度が略150〜160度となる断面形状を有するように加工した。
(比較例1)
透明基板に溝加工を行わず、集電配線を設けないこと以外は実施例1と同様の材料、方法を用いて光増感型太陽電池を作製した。同様にエネルギー変換効率を測定したところ0.3%であった。集電配線が無いことにより大面積での発電効率が大幅に低下していることが確認できた。
(比較例2)
溝加工用のダイヤモンドブレードの先端形状を、厚さ50μm、先端形状が矩形状をなすダイヤモンドブレードを用いて透明基板上面に溝加工を施した。加工溝は最大深さ15μm
として、透明基板上面と溝の端面の角度が90度となる断面形状を有するように加工した。
2…導電層
3…電解質層
4…半導体電極
5…半導体層
6…透明電極層
7…集電配線
8…透明基板
9,10…エポキシ樹脂
Claims (5)
- 傾斜壁面を有する溝を有する透明基板と、
前記溝の前記傾斜壁面に設けられた金属からなる集電配線と、
前記透明基板上の前記溝以外の領域に設けられた透明電極層と、
前記透明電極層及び前記集電配線の上に設けられた半導体層と、
前記半導体層上に設けられ、表面に色素が担持された半導体電極と、
前記半導体電極に離間対向して配置され、表面に導電層を有する対向基板と、
前記半導体電極と前記導電層との間に設けられ、ヨウ素分子及びヨウ化物を含む電解質とを有する電解質層と
を具備することを特徴とする光増感型太陽電池。 - 前記溝の断面が、V字形状、U字形状、若しくは階段状であることを特徴とする請求項1記載の光増感型太陽電池。
- 透明基板上に透明電極層を形成する工程と、
前記透明電極層を形成した前記透明基板に、傾斜壁面を有する溝を形成する工程と、
前記溝の前記傾斜壁面に金属からなる集電配線を形成する工程と、
前記集電配線を形成した前記溝及び前記透明電極層の上に半導体層を形成する工程と、
前記半導体層上に半導体電極を形成し、前記半導体電極に色素を担持させる工程と、
対向基板の表面に導電層を形成する工程と、
前記半導体電極を形成した前記透明基板と前記導電層を形成した前記対向基板とを対向させて配置し、ヨウ素分子及びヨウ化物を含む電解質を注入してから封止して電解質層を形成する工程と
を具備することを特徴とする光増感型太陽電池の製造方法。 - 前記溝の断面が、V字形状、U字形状、若しくは階段状であることを特徴とする請求項3記載の光増感型太陽電池の製造方法。
- 表面に複数の透明電極層を有し、前記透明電極層の間に傾斜壁面を有する溝が形成された透明基板と、
前記溝の前記傾斜壁面に設けられた金属からなる集電配線と、
前記透明電極層及び前記集電配線を覆う半導体層と、
前記半導体層上に設けられ、表面に色素が担持された半導体微粒子群と、
前記半導体微粒子群に離間対向して配置され、表面に導電層を有する対向基板と、
前記半導体微粒子群と前記導電層との間に設けられ、ヨウ素分子及びヨウ化物を含む電解質とを有する電解質層と
を具備することを特徴とする光増感型太陽電池。
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