Scholarlink

<p>Achieving a well-controlled electron-selective layer is critical for the device scalability and performance of perovskite solar cells. While phenyl-C<sub>61</sub>-butyric acid methyl ester (PCBM) is a promising electron-selective material in inverted perovskite solar cells, its dimerization under environmental stress accelerates the material degradation and complicates producing high-quality PCBM layers, thereby compromising device long-term operational stability and scale-up fabrication. Here we investigated the PCBM molecular stacking on perovskite surfaces, finding that the variability in perovskite surface termination leads to orientation and distribution heterogeneity of the PCBM layer, resulting in undesirable dimerization. To address this, we developed a molecular dopant for suppressing PCBM dimer formation, achieving a certified efficiency of 26.4% in laboratory-scale devices and 25.3% in 1 cm<sup>2</sup> devices. Furthermore, these devices maintained 93% of their initial power conversion efficiency after 1,500 h of ageing at 85 °C following the ISOS L-2I protocol.</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

Suppression of PCBM dimer formation in inverted perovskite solar cells

  • 期刊论文

  • 发表日期：

    2025年9月30日

查看全文
  • Zheng Liang,
  • Huifen Xu,
  • Zhenda Huang,
  • Xia Lei,
  • Jiajiu Ye,
  • Yong Zhang,
  • Peide Zhu,
  • Boyuan Liu,
  • Wenjing Chen,
  • Xue Wang,
  • Yaru Li,
  • Yunxiao Liao,
  • Shirui Weng,
  • Yuli Tao,
  • Yalan Zhang,
  • Hui Zhang,
  • Feng Chen,
  • Jie Zeng,
  • Xiangbin Cai,
  • Sang-Uk Lee,
  • Jiufeng Dong,
  • Wanting Liu,
  • Hongmin Zhou,
  • Hongzhen Lin,
  • Liangbao Yang,
  • Guoning Xu,
  • Yong Ding,
  • Jiang Sheng,
  • Jingbai Li,
  • Shangfeng Yang,
  • Baomin Xu,
  • Zhengguo Xiao,
  • Thomas Kirchartz,
  • Xu Pan,
  • Nam-Gyu Park

摘要

Achieving a well-controlled electron-selective layer is critical for the device scalability and performance of perovskite solar cells. While phenyl-C61-butyric acid methyl ester (PCBM) is a promising electron-selective material in inverted perovskite solar cells, its dimerization under environmental stress accelerates the material degradation and complicates producing high-quality PCBM layers, thereby compromising device long-term operational stability and scale-up fabrication. Here we investigated the PCBM molecular stacking on perovskite surfaces, finding that the variability in perovskite surface termination leads to orientation and distribution heterogeneity of the PCBM layer, resulting in undesirable dimerization. To address this, we developed a molecular dopant for suppressing PCBM dimer formation, achieving a certified efficiency of 26.4% in laboratory-scale devices and 25.3% in 1 cm2 devices. Furthermore, these devices maintained 93% of their initial power conversion efficiency after 1,500 h of ageing at 85 °C following the ISOS L-2I protocol.