Scholarlink

<p>Perovskite solar cells tend to degrade much faster under day-night cycling conditions. One key reason lies in the periodic strain in perovskite film under cycling mode due to its soft crystal lattice nature. Here, we propose a dynamic reversible crosslinking strategy by introducing disulfide-mediated cross-linkable additive of 2-methacryloyloxyethyl-thioctate. Combining with carbon-carbon double bond, 2-methacryloyloxyethyl-thioctate crosslinks at grain boundaries at high temperature through disulfide bond ring-opening, inhibiting perovskite expansion under day conditions. While at room temperature, 2-methacryloyloxyethyl-thioctate de-crosslinks with inverse ring-closing reaction, promoting perovskite recovery under night conditions. As a result, periodic film strain is alleviated in PSCs during day-night cycling aging. Resulting devices show high efficiency of 26.5% with good cycling stability, retaining 95.7% of initial efficiency after MPP tracking for 1,800 h under day-night cycling mode.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Reversible crosslinking strategy for dynamic strain regulation in inverted perovskite solar cells

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年3月17日

查看全文
  • Wen Li,
  • Bo Feng,
  • Zhengbo Cui,
  • Wentao He,
  • Chi He,
  • Wenxiao Zhang,
  • Sheng Fu,
  • Xiaodong Li,
  • Junfeng Fang

摘要

Perovskite solar cells tend to degrade much faster under day-night cycling conditions. One key reason lies in the periodic strain in perovskite film under cycling mode due to its soft crystal lattice nature. Here, we propose a dynamic reversible crosslinking strategy by introducing disulfide-mediated cross-linkable additive of 2-methacryloyloxyethyl-thioctate. Combining with carbon-carbon double bond, 2-methacryloyloxyethyl-thioctate crosslinks at grain boundaries at high temperature through disulfide bond ring-opening, inhibiting perovskite expansion under day conditions. While at room temperature, 2-methacryloyloxyethyl-thioctate de-crosslinks with inverse ring-closing reaction, promoting perovskite recovery under night conditions. As a result, periodic film strain is alleviated in PSCs during day-night cycling aging. Resulting devices show high efficiency of 26.5% with good cycling stability, retaining 95.7% of initial efficiency after MPP tracking for 1,800 h under day-night cycling mode.