ルーテニウムヘテロレプティック複合体におけるe(-) -TiO2とI(-) /I3(-) 電解質の接面電荷再結合:染料分子構造-オープン回路電圧関係
Anna Reynal1, Amparo Forneli, Eugenia Martinez-Ferrero
1Institute of Chemical Research of Catalonia, Avda. Països Catalans 16, Tarragona, Spain.
Journal of the American Chemical Society
|September 23, 2008
まとめ
特定の機能群を持つルテニウム (II) ポリピリジル複合体は,染料に敏感化された太陽電池の性能への影響について研究されました. 特定の機能化されたルテニウム複合体は電子の再結合を加速し,デバイスの効率を阻害しました.
科学分野:
- マテリアルサイエンス 材料科学
- フォトケミストリー フォトケミストリー
- 電気化学 電気化学について
背景:
- ルテニウム (II) ポリピリジル複合体は,染料感受性太陽電池 (DSSC) で決定的に重要です.
- インターフェイスの電荷伝送を理解することは,DSSCの効率を向上させるための鍵です.
- フェナントロリンリンガンドは,ルテニウム複合体の性質に影響を与えます.
研究 の 目的:
- 新規のヘテロレプティックルテニウム (II) ポリピリジル複合体を設計,合成,特徴づけること.
- これらの複合体のスペクトル学的および電気化学的性質を調査する.
- DSSCにおけるインターフェースの電荷伝送に対する機能群の効果を明らかにする.
主な方法:
- ルテニウム (II) ポリピリジル複合体の合成と特徴付け.
- 溶液および半導体表面における光譜および電気化学分析.
- 時間解像度の単光子カウントとレーザートランジントスペクトロスコーピー.
- 光誘発光電圧測定. 光誘発光電圧測定. 光誘導光電圧測定. 光誘導光電圧測定. 光誘導光電圧測定. 光誘導光電圧測定. 光誘導光電圧測定. 光誘導光電圧測定. 光誘導光電圧測定. 光誘導光電圧測定. 光誘導光電圧測定. 光誘導光電圧測定.
主要な成果:
- 電子提供 (-NH2) と電子取り除く (-NO2) グループを持つルテニウム複合体を合成した.
- これらの機能化された複合体は,インターフェイスの電荷伝送プロセスを大幅に変化させた.
- 光注入された電子とヨウ素/トリヨウ素 (I-/I3-) リドックス電解質の間の電子再結合が強化されました.
- 装置の性能は,これらの加速された再結合反応によって制限されていました.
結論:
- ルテニウム複合体の特定の機能群の存在は,DSSCのインターフェイスの電荷伝送ダイナミクスに重大な影響を及ぼします.
- 電子提供および電子取り除くグループは,有害な電子再結合経路を促進することができます.
- ルテニウム複合体のさらなる設計では,デバイスの効率を高めるためにこれらの再結合経路を最小限に抑えることを検討する必要があります.
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