混合金属カルコハリドSn2SbS2I3における静的および動的障害の相互作用
Adair Nicolson1, Joachim Breternitz2, Seán R Kavanagh1,3
1Thomas Young Centre and Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
Journal of the American Chemical Society
|May 30, 2023
まとめ
カルコハリド結晶は 安定した高性能光電子機器を提供します Sn2SbS2I3のカチオン障害はバンドギャップを低減し,カスタマイズされた太陽電池アプリケーションを可能にします.
科学分野:
- 材料科学
- 固体物理学
- クリスタルグラフィー
背景:
- カルコハリド混合アニオン結晶はペロブスキートに触発された材料として出現しています.
- 彼らは,カルコゲニドの安定性をハライドの光電子特性と組み合わせることを目的としています.
- Sn2SbS2I3は4%以上の太陽光発電効率で潜在性を示しています.
研究 の 目的:
- Sn2SbS2I3の結晶構造と物理的性質を明らかにする.
- 材料の特性に対するカチオンの乱れの影響を調査する.
- カルコハリドの光電子応用の可能性を調査する.
主な方法:
- 結晶構造を予測するための第一原理のクラスター膨張アプローチ
- 単一結晶のX線微分法で 構造の予測を確認した
- バンドギャップの測定は,様々な温度で行われます.
主要な成果:
- 静的および動的カチオン構造の乱れが予測され,確認された.
- 帯域の隙間を1. 8 eVから1. 5 eVに減らすことが判明しました.
- このバンドギャップのチューニングは,573Kでの実験的なアニニングに関連しています.
結論:
- Sn2SbS2I3のカチオン障害はバンドギャップに大きな影響を与える.
- 分類された太陽電池は 乱れを調整する能力が有望です
- グループIV/Vのカルコハリド族は,欠陥と障害の許容性のために,光電子機器のさらなる調査を正当化します.
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