JP2007200796A - 光電変換装置及びゲル化剤 - Google Patents
光電変換装置及びゲル化剤 Download PDFInfo
- Publication number
- JP2007200796A JP2007200796A JP2006020306A JP2006020306A JP2007200796A JP 2007200796 A JP2007200796 A JP 2007200796A JP 2006020306 A JP2006020306 A JP 2006020306A JP 2006020306 A JP2006020306 A JP 2006020306A JP 2007200796 A JP2007200796 A JP 2007200796A
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- Prior art keywords
- photoelectric conversion
- dye
- conversion device
- electrolyte
- semiconductor layer
- Prior art date
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- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/20—Light-sensitive devices
- H01G9/2004—Light-sensitive devices characterised by the electrolyte, e.g. comprising an organic electrolyte
- H01G9/2009—Solid electrolytes
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- H—ELECTRICITY
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- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/20—Light-sensitive devices
- H01G9/2027—Light-sensitive devices comprising an oxide semiconductor electrode
- H01G9/2031—Light-sensitive devices comprising an oxide semiconductor electrode comprising titanium oxide, e.g. TiO2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
【解決手段】 色素増感型光電変換装置10を、主として、ガラスなどの透明基板1、FTO(フッ素がドープされた酸化スズ(IV)SnO2)などの透明導電層からなる透明電極(負極)2、光増感色素を保持した半導体層3、ゲル状電解質層4、対向電極(正極)5、対向基板6、および封止材などで構成する。電解質層4を、I-/I3 -などの酸化還元種(レドックス対)を含む有機電解液などで構成し、本発明の特徴として、比表面積が大きく、電解液を保持する性能が高い酸化チタン系繊維状マトリックス材によってゲル化する。半導体層3としては、酸化チタンTiO2の微粒子を焼結させた多孔質層を用い、白金層5bなどからなる対向電極5を対向基板6の上に形成する。
【選択図】 図1
Description
2I- → I2 + 2e-
I2 + I- → I3 -
によって電子を受け取り、電解質層104中に酸化剤、例えば、三ヨウ化物イオンI3 -(I2とI-との結合体)を生成させる。生じた酸化剤は拡散によって対向電極5に到達し、上記の反応の逆反応
I3 - → I2 + I-
I2 + 2e- → 2I-
によって対向電極5から電子を受け取り、もとの還元剤に還元される。
前記電解質層は、電解液が繊維状の無機マトリックスに保持されてゲル状になってい る
ことを特徴とする、光電変換装置に係わるものである。また、繊維状の無機マトリックス材料からなる、ゲル化剤に係わるものである。
2I- → I2 + 2e-
I2 + I- → I3 -
によって電子を受け取り、ゲル状電解質層4中に酸化剤、例えばI3 -を生成させる。生じた酸化剤は拡散によって対向電極5に到達し、上記の反応の逆反応
I3 - → I2 + I-
I2 + 2e- → 2I-
によって対向電極5から電子を受け取り、もとの還元剤に還元される。
実施例1
半導体層3を形成する原料である酸化チタンTiO2のペーストは、Solaronix社製 Ti-Nanoxide Tを用いた。このTiO2ペーストを、ブレードコーティング法によって、透明基板1上の透明電極(透明導電層)2であるFTO層の上に塗布し、大きさ5mm×5mm、厚さ200μmの正方形の微粒子層を形成した。この後、500℃に30分間保持して、TiO2微粒子をFTO層2上に焼結した。焼結されたTiO2膜を0.05Mの塩化チタン(IV)TiCl4水溶液中に70℃の下で30分間保持した後、洗浄し、再び500℃で30分間焼成を行った。
ゲル化剤として表1に示す材料を用いた以外は実施例1と同様にして、色素増感型光電変換装置を作製した。ゲル化剤の混合率(ゲル全体に対する割合)はゲル化に必要な最少量とした。
以上のようにして作製した実施例1および比較例1〜4の色素増感型光電変換装置について、擬似太陽光(AM1.5、100mW/cm2)照射時における電流−電圧曲線のフィルファクタならびに光電変換効率を測定した。表2はこの測定結果を示す表である。
3…光増感色素を保持した半導体層、4…ゲル状電解質層、5…対向電極(正極)、
6…対向基板、10…光増感型光電変換装置、100…光増感型光電変換装置、
104…電解質層(液状)
Claims (10)
- 半導体層と対向電極との間に配置された電解質層を有する光電変換装置において、
前記電解質層は、電解液が繊維状の無機マトリックスに保持されてゲル状になってい る
ことを特徴とする、光電変換装置。 - 前記無機マトリックスは、金属酸化物の微粒子をpH10以上の強アルカリ性下で水熱反応処理して得られた無機マトリックス材からなる、請求項1に記載した光電変換装置。
- 前記金属酸化物が酸化チタンである、請求項2に記載した光電変換装置。
- 前記水熱反応処理は、水酸化リチウムLiOH、水酸化ナトリウムNaOH、及び水酸化カリウムKOHからなる群から選ばれた少なくとも1種の塩基を含む水溶液中で行われる、請求項2に記載した光電変換装置。
- 前記半導体層に光増感色素が保持され、光吸収によって励起された前記光増感色素の電子が前記半導体層へ取り出されるとともに、前記電子を失った前記光増感色素は、前記電解質層中の還元剤によって還元される色素増感型光電変換装置として構成されている、請求項1に記載した光電変換装置。
- 繊維状の無機マトリックス材からなる、ゲル化剤。
- 前記無機マトリックス材が結晶性のナノ材料からなる、請求項6に記載したゲル化剤。
- 前記無機マトリックス材の組成が一般式(M,H)xTiyOz(但し、Mは、リチウムLi、ナトリウムNa、及びカリウムKからなる群から選ばれた少なくとも1種のアルカリ金属元素であり、x、y及びzは正の数である。)で表される、請求項7に記載したゲル化剤。
- 前記繊維状の結晶性ナノ材料の直径が、2〜80nmである、請求項8に記載したゲル化剤。
- 前記繊維状の結晶性ナノ材料の長さが、100nm以上である、請求項8に記載したゲル化剤。
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Publication number | Publication date |
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JP5007784B2 (ja) | 2012-08-22 |
CN101013729A (zh) | 2007-08-08 |
US20070175510A1 (en) | 2007-08-02 |
CN101013729B (zh) | 2010-06-23 |
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