ペロブスキート光伏の表面欠陥被動化のための構成分子構成
Rui Wang1, Jingjing Xue2, Kai-Li Wang3
1Department of Materials Science and Engineering and California NanoSystems Institute, University of California Los Angeles, CA 90095, USA.
Science (New York, N.Y.)
|December 21, 2019
まとめ
メタルハリドペロブスキットの分子構成を最適化すると,欠陥の被動化が促進され,太陽電池の効率が向上します. テオフィリン処理は,表面欠陥結合を最大化することによって,光伏装置の性能を改善しました.
科学分野:
- 材料科学
- 太陽光発電
- 化学について
背景:
- 表面のトラップは非放射性電荷の再結合によって金属ハリドペロブスキート太陽電池の効率を制限します.
- ペロブスキットのイオン性を利用した 有望な戦略です
- 合理的な分子設計には,構成が受容効果にどのように影響するかを理解する必要があります.
研究 の 目的:
- メタルハリドペロブスキートにおける欠陥の被動化に対する分子構成の影響を体系的に調査する.
- 化学環境と機能群の配置が受容性を高める役割を探求する.
- 光伏の性能を改善するための最適な分子設計を特定する.
主な方法:
- テオフィリン,カフェイン,テオブロミンを 欠陥の消化剤として調べた
- 化学環境と機能群構成 (N-H,C=O) を分析した.
- アンチサイトPb欠陥との水素結合形成と結合相互作用を研究した.
主要な成果:
- 最適なN-HとC=Oの構成は,N-Hとヨウ素の間の水素結合を容易にする.
- この相互作用は,抗サイトPb欠陥とのC=O結合を強化し,表面の受動性を最大化する.
- テオフィリン処理により,太陽光発電装置の安定した電力変換効率が22.6%に達した.
結論:
- 分子構成は,ペロブスキート光伏の有効な欠陥被動化に不可欠です.
- テオフィリンの分子構造は,シネジスティックな水素結合と欠陥結合を通じて優れた受動性を可能にします.
- この研究は,高効率のペロブスキート太陽電池を実現するために,受容分子の合理的な設計のための経路を提供します.
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