太陽電池における分子フォトンの向上変換の利用:レドックス媒体の役割
1Department of Chemistry and Biochemistry, Florida State University , Tallahassee, Florida 32306, United States.
Journal of the American Chemical Society
|August 1, 2017
まとめ
太陽電池における効率的な光子向上変換 (TTA-UC) の鍵となるのは,適切な酸化還元媒介体の選択である. 異なる媒体は,光の収集とエネルギー変換に大きく影響し,太陽電池の全体的な性能に影響します.
科学分野:
- 材料科学
- 太陽光発電
- 化学工学
背景:
- 自己組み立てバイレイヤは,光子の向上変換 (TTA-UC) を可能にし,理論的な太陽電池効率の限界を高めます.
- トリプレット・トリプレット・アニヒレーション・アップコンバージョン (TTA-UC) は次世代太陽電池の有望な技術です.
研究 の 目的:
- 自己組み立ての2層太陽電池におけるTTA-UC効率に対する酸化還元媒介者の影響を調査する.
- メディエーターの選択が光採集とTTA-UC性能にどのように影響するか理解する.
主な方法:
- コバルト基の異なる酸化還元媒介を用いた自己組み立ての二層太陽電池の製造と試験.
- 光電流とTTA-UC効率の測定 異なる光強度下での測定
- 三重刺激状態に影響を与える消火機構の分析.
主要な成果:
- コバルト (II/III) 複合体であるコフェン (Co-phen) 3は,1日の間で最も高い光電流 (0.158 mA cm-2) を発生させた.
- Co(pz-py-pz) 2メディエーターは,低興奮強度 (0.8 mW cm-2) で最大TTA-UC効率を達成した.
- 媒介体に依存する性能の変動は,Co (II) とCo (III) 種によるトリプル興奮状態の消火と関連している.
結論:
- レドックスメディエーターの選択は,TTA-UC太陽電池の性能に重大な影響を及ぼします.
- TTA-UC太陽電池の最適化には,媒介体誘発の消火メカニズムを理解することが不可欠です.
- レドックスメディエーターの調整は,光収集とTTA-UC効率の両方を向上させ,太陽エネルギー変換を改善することができます.
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