異なるステキオメトリーで電荷キャリアの生成と輸送 APFO3:PC61BM 太陽電池
Vytenis Pranculis1, Yingyot Infahsaeng, Zheng Tang
1Center for Physical Sciences and Technology , Savanoriu 231, LT-02300 Vilnius, Lithuania.
Journal of the American Chemical Society
|July 16, 2014
まとめ
APFO3:PC61BMの太陽電池を調査すると,キャリア漂流と抽出ダイナミクスはステキオメトリーに大きく依存していることが明らかになる. より速い電子運動は,効率的な電荷分離と高い太陽電池効率に不可欠です.
科学分野:
- 有機太陽光発電は,有機太陽光発電です.
- 半導体デバイス物理学の物理
- マテリアルサイエンス 材料科学
背景:
- チャージキャリアダイナミクスを理解することは,有機太陽電池の性能を最適化するために重要です.
- ドナーと受容体の混合物のステキオメトリーは,デバイスの効率に大きく影響します.
研究 の 目的:
- 異なるステキオメトリーを持つ太陽電池でキャリアの漂流と抽出のダイナミクスを調査する.
- キャリアダイナミクスを太陽電池の変換効率と相関させるため.
主な方法:
- 超高速光学電場探査と一時的な統合光電流技術を使用しました.
- 研究したAPFO3:PC61BM太陽電池は,ステキオメトリーが 2:1, 1:1, 1:4.
- 分析されたキャリアダイナミクスは,サブピコ秒からマイクロ秒までの時間帯に及ぶ.
主要な成果:
- キャリアの漂流と抽出は,ステキオメトリーに強く依存しています.
- 電子のドリフトと抽出速度は,PC61BM濃度が高くなるにつれて増加します.
- 穴の抽出は,電子抽出と比較してステキオメトリーにあまり依存していません.
結論:
- 素早い電子運動は,高効率な電荷载体分離とゲミナート再結合の防止に不可欠である.
- ステキオメトリーの最適化は,電子抽出と太陽電池全体の効率を高めるための鍵です.
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