深層トラップとペロフスキート太陽電池の効率の相互作用の計算分析
Kara Kearney1,2, Gabseok Seo2,3, Toshinori Matsushima2,3,4
1Department of Mechanical Science and Engineering , University of Illinois , 1204 West Green Street , Urbana , Illinois 61801 , United States.
Journal of the American Chemical Society
|October 30, 2018
まとめ
メチルアモニアム鉛ヨウ酸化物 (MAPbI3) の新しい沈殿方法は,深層トラップの分布を変えることで,太陽電池の効率に影響を与えます. 2段階の処理は,インターフェイスにトラップを集約し,一段階の方法と比較して電力変換効率を高めます.
科学分野:
- 材料科学
- 再生可能エネルギー
- 固体物理学
背景:
- ハリドペロブスキート太陽電池は高い電力変換効率を提供します.
- メチルアモニウム鉛ヨウ酸化物 (MAPbI3) は,ペロブスキットの主要な材料である.
- MAPbI3の深層トラップは,電荷キャリアの再結合を促進することによって,太陽電池の性能を制限します.
研究 の 目的:
- MAPbI3太陽電池における深層トラップの空間的分布に対する堆積方法の影響を調査する.
- トラップの分布と太陽電池の効率の関係を解明する.
- 1段階と2段階の加工方法の効率の違いの起源を理解する.
主な方法:
- 光刺激された電荷キャリア経路をシミュレートするための有限要素漂流拡散モデリング.
- MAPbI3の1段階と2段階の太陽電池の分析
- ペロブスキート膜の組成と構造分析
主要な成果:
- 一段階処理の結果,大量のMAPbI3フィルム全体に分布する深層の罠になります.
- 2段階処理は,MAPbI3/メソポラスTiO2インターフェイスで深層トラップの集まりにつながります.
- 太陽電池の効率の有意な差 (13.5%の1段階と17.7%の2段階) はトラップの分布と相関しています.
結論:
- 深層のトラップの空間的分布は,ペロブスキート堆積方法に決定的に依存しています.
- 2段階処理のセルに配置されたインターフェーストラップは,1段階処理のセルに配置された大量分散トラップよりも効率を損ねません.
- ペロブスキート太陽電池の性能を最適化するには,トラップ分布を理解し制御することが不可欠です.
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