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Updated: Aug 21, 2025
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表面電位を調節することで,全ペロフスキットタンデムの電圧を最大化します
Hao Chen1, Aidan Maxwell1, Chongwen Li1,2
1The Edward S. Rogers Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, Canada.
Nature
|November 15, 2022
まとめ
新しいダイアモニウム分子は 広帯域ペロブスキート太陽電池の電圧損失を軽減します この画期的な発見は,ペロブスキート太陽電池とタンデムデバイスの電力変換効率 (PCE) と安定性を高めています.
科学分野:
- 材料科学
- 再生可能エネルギー
- 太陽光発電
背景:
- 帯域間隔の広いペロブスキート太陽電池は,より狭い帯域間隔の同位体と比較して,重要なオープン回路電圧 (VOC) の不足を示しています.
- この赤字は,主に,表面電位の不均一性とエネルギー調整の不良によって引き起こされる電子輸送層の接触でVOCを制限する再結合に起因する.
- 既存のモノアンモニア表面処理は,これらの問題を解決するのに不十分です.
研究 の 目的:
- ブロードバンドギャップのペロブスキート太陽電池のオープン回路電圧 (VOC) の不足を調査し,軽減する.
- ペロブスキートと電子輸送層の接点におけるエネルギー調整と表面電位の均一性を改善する.
- パワー変換効率 (PCE) とペロブスキート太陽電池とタンデム装置の運用安定性を向上させる.
主な方法:
- ペロブスキットの表面状態を変更するために,ダイアモニウム分子,特に1,3-プロパンダイアモニウムを導入する.
- より均一な空間的分布を達成するために,表面状態の変更.
- シングル・ジャンクション・ペロフスキート・ソーラー・セルとモノリシック・オール・ペロフスキート・タンデム・ソーラー・セルの製造と特徴付け
主要な成果:
- ダイアモニウム処理は準フェルミレベルの分裂を90 meV増加させた.
- 1.79 eVのペロブスキート太陽電池と1.33VのOCと19%以上のPCEを達成しました.
- 2.19Vの記録的なVOC (89%の詳細なバランス制限) と27%以上のPCE (26.3%の認証) を有する単体全ペロブスキートタンデム太陽電池を開発しました.
- タンデム装置は500時間の動作後に最初のPCEの86%以上を保持しました.
結論:
- ダイアモニウム分子はペロブスキットの表面状態を効果的に受動させ,エネルギー調整を改善し,VOC赤字を大幅に軽減します.
- 開発された表面処理により,高性能で安定した広帯域のペロブスキート太陽電池とタンデム装置が可能になります.
- この進歩は,効率的な太陽エネルギー変換のためのペロブスキート光伏の完全な可能性を実現するための重要なステップです.
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