コバルトの置換されたポリピリジン複合体 ((II/III) は,染料に敏感化された太陽電池における効率的な電子伝送媒介体として使用されています
Shawn A Sapp1, C Michael Elliott, Cristiano Contado
1Contribution from the Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, USA.
Journal of the American Chemical Society
|September 13, 2002
まとめ
新しいコバルト複合体は,染料感受性太陽電池 (DSSC) の安定した,非腐食性の代替電子伝送媒介体を提供し,リチウム塩添加物で性能を改善します.
科学分野:
- マテリアルサイエンス 材料科学
- 電気化学 電気化学について
- 再生可能エネルギーの再生可能エネルギー
背景:
- 染料感受性太陽電池 (DSSC) の伝統的なヨウ素/トリヨウ素リドックスカップルは,揮発性があり,腐食性があります.
- 安定で効率的な電子伝送媒体の開発は,DSSC技術の進歩に不可欠です.
研究 の 目的:
- コバルト複合体をDSSCの潜在的非揮発性,非腐食性媒介体として合成し,研究する.
- これらのコバルト複合物の性能を,従来の媒介物と比較して評価する.
- 介介器の性能に影響を与える要因を理解するために,電極材料と添加物を含む.
主な方法:
- 代替ポリピリジンリガンドによるコバルト複合体の合成.
- 可視光譜法と周期電圧計を用いた特徴付け.
- コバルト複合媒介体と様々なカトド材料 (金,炭素,プラチナ) を使ったDSSCの組み立てと試験.
- 細胞機能に対するリチウム塩添加物の効果の調査.
主要な成果:
- コバルト複合体は,適切な絶滅係数を示し,染料との競争を最小限に抑えました.
- 電子伝送率は,電極材料に大きく依存しており,金と炭素はプラチナを上回った.
- カトド材料の腐食は観察されなかった.
- リチウム塩の添加は,再結合を減少させることで,DSSCのパフォーマンスを劇的に改善しました.
- 最高のコバルトメディエーターはヨウ酸化物/三酸化物システムに匹敵する効率を達成しました.
結論:
- コバルト複合体は,DSSCsの有効な,揮発性のない,腐食性のない電子伝送媒介体である.
- 金と炭素は,これらの媒介者のための優れたカトド材料です.
- リチウム塩の添加により,DSSCの性能が著しく向上します.
- この研究は,太陽電池アプリケーションのための実用的で効率的な代替メディエーターを提示しています.
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