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<p>This study demonstrates a dual-interface engineering approach for performance enhancement in perovskite-silicon tandem solar cells. By applying ethylenediamine dihydroiodide (EDAI<sub>2</sub>) to simultaneously modify both top and bottom interfaces of wide-bandgap perovskite layers, we achieve synergistic defect suppression and charge transport optimization. Time-resolved photoluminescence characterization reveals extended carrier lifetimes and improved spatial homogeneity in dual-modified perovskite films. The optimized single-junction wide-bandgap (&gt;1.66 eV) perovskite solar cells attain a champion efficiency of 22.75% with enhanced operational stability. Implemented in perovskite-silicon tandem configuration, the devices achieve over 31% power conversion efficiency, validating the effectiveness of organic ligand-mediated dual-interface engineering in regulating carrier dynamics and advancing perovskite-based tandem photovoltaics.</p>

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Dual-interface engineering strategy for optimizing carrier dynamics in perovskite-silicon tandem solar cells

  • 期刊论文

  • 发表日期：

    2026年1月4日

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  • Quanxing Ma,
  • Yifan Chen,
  • Zhou Liu,
  • Xinxin Lian,
  • Ming Luo,
  • Shaobing Xiong,
  • Jike Ding,
  • Wenhuan Gao,
  • Xueling Zhang,
  • Yi Mo,
  • Qinye Bao,
  • Shengfan Wu,
  • Yifeng Chen,
  • Zhiqiang Feng,
  • Xiaoliang Mo,
  • Cong Chen,
  • Junhao Chu,
  • Hong Zhang

摘要

This study demonstrates a dual-interface engineering approach for performance enhancement in perovskite-silicon tandem solar cells. By applying ethylenediamine dihydroiodide (EDAI2) to simultaneously modify both top and bottom interfaces of wide-bandgap perovskite layers, we achieve synergistic defect suppression and charge transport optimization. Time-resolved photoluminescence characterization reveals extended carrier lifetimes and improved spatial homogeneity in dual-modified perovskite films. The optimized single-junction wide-bandgap (>1.66 eV) perovskite solar cells attain a champion efficiency of 22.75% with enhanced operational stability. Implemented in perovskite-silicon tandem configuration, the devices achieve over 31% power conversion efficiency, validating the effectiveness of organic ligand-mediated dual-interface engineering in regulating carrier dynamics and advancing perovskite-based tandem photovoltaics.