低帯域ギャップの共ポリマー混合物における連鎖間相互作用,エクシトン離位化,および電荷分離の関係
Zhi Guo1, Doyun Lee, Richard D Schaller
1Radiation Laboratory, ‡Department of Aerospace and Mechanical Engineering, and §Department of Chemistry and Biochemistry, University of Notre Dame , Notre Dame, Indiana 46556, United States.
Journal of the American Chemical Society
|June 24, 2014
まとめ
ドナー・アクセプター共ポリマーの高ポリマー結晶性は,不利な連鎖間エキストンによる電荷分離を遅らせ,新しい太陽電池設計を必要とします. これはP3HTホモポリマーの行動と対照的です.
科学分野:
- マテリアルサイエンス 材料科学
- フォトボルトイカは,太陽光発電です.
- ポリマー化学のポリマー化学について
背景:
- ドナー-受容体共ポリマーは,効率的な太陽電池の鍵です.
- 充電分離のダイナミクスを理解することは,デバイスの性能にとって極めて重要です.
研究 の 目的:
- PBDTTT共ポリマーにおける電荷分離に対する結晶性および連鎖間相互作用の影響を調査する.
- 超高速電荷分離経路における連鎖内および連鎖間種の役割を明らかにする.
主な方法:
- PBDTTT共ポリマーにおけるアルキル側鎖の体系的な変化.
- 超高速スペクトル検査と計算量子化学を組み合わせたものです.
- エネルギーレベル,興奮状態構造,および動態の特徴.
主要な成果:
- 線形側鎖は結晶性を促進し,連鎖の間のエクシトン形成を促進する.
- より高い結晶性は,より粗い相分離により,より遅い電荷分離につながります.
- 低帯域ギャップの共ポリマーの連鎖間刺激子は,エネルギー的に電荷分離に不利である.
結論:
- 低帯域ギャップコポリマーのための最適化された太陽電池形態は,P3HTベースのデバイスとは異なる必要があります.
- 長距離の結晶領域は,低帯域ギャップの共ポリマー太陽電池の性能に悪影響を及ぼす可能性があります.
- 分子パッキングの調整は,有機光伏の効率的な電荷分離に不可欠です.
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