高性能光伏のインターレイヤ空間における二次元ペロフスキットのダイナミック変換
Yalan Zhang1, Peijun Wang1, Ming-Chun Tang2
1Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education; Shaanxi Key Laboratory for Advanced Energy Devices; Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering , Shaanxi Normal University , Xi'an 710119 , China.
Journal of the American Chemical Society
|January 17, 2019
まとめ
この研究では,交代性カチオン (ACI) 2Dペロブスキートフィルムが結晶化し,太陽電池の性能を改善するための重要な中間段階を特定しています. これらの洞察は,ペロブスキート太陽電池の効率と安定性を記録する14.7%につながります.
科学分野:
- 材料科学
- 固体化学
- 太陽光発電
背景:
- 交代カチオン (ACI) の二次元 (2D) ペロブスキットは,ラドルズデン・ポッパー構造と比較してユニークな性質を提供します.
- フィルムのACI2Dペロブスキットの結晶化を理解することは,光電子特性とデバイスの性能を最適化するために不可欠です.
- フィルム固化プロセスとその光伏アプリケーションへの影響に関する現在の知識のギャップは存在します.
研究 の 目的:
- ACI 2Dペロブスキートフィルムの固化過程を調査する.
- 結晶化行動と形態学,光電子特性,太陽電池デバイスの性能を相関させる.
- ACIペロブスキート膜の形成における中間段階の役割を明らかにする.
主な方法:
- 結晶化を監視するために,インシット牧草発生X線散射 (GIWAXS)
- 短時間吸収スペクトロスコーピーは,電荷の移転を研究する.
- 平面的な太陽電池装置の製造と特徴付け
主要な成果:
- 固化プロセスは,無秩序な前体,中間段階 (2D GA2PbI4を含む) および最終的なACIペロブスキットを含む.
- 2D GA2PbI4は,副産物の形成と相分布に影響を与える重要な中間段階として特定されています.
- ACIペロブスキート膜内の異なるn相間の内部電荷転送が確認された.
結論:
- DMSO:DMF溶媒の混合物を用いた最適化されたACI2Dペロブスキートフィルムは,記録的な14.7%の電力変換効率を達成します.
- これらのフィルムは3D MAPbI3ペロブスキートと比較して長期的に安定性が著しく向上しています.
- 高性能で安定したペロブスキート太陽電池には 中間段階の結晶化を制御することが重要です
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