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<p>While self-assembled material based inverted perovskite solar cells have surpassed power conversion efficiencies of 26%, enhancing their performance in large-area configurations remains a significant challenge. In this work, we report a self-assembled material based hole-selective layer 4-(7<i>H</i>-dibenzo[<i>c,g</i>]carbazol-7-yl)phenyl)phosphonic acid, with a π-expanded conjugation. The enhanced intermolecular π–π interactions facilitate the self-assembly of 4-(7<i>H</i>-dibenzo[<i>c,g</i>]carbazol-7-yl)phenyl)phosphonic acid molecules to form an ordered bilayer with a hydrophilic surface, which passivates the buried perovskite interface defect and enables high-quality and large-area perovskite preparation, while simultaneously enhancing interfacial charge extraction and transport. The certified efficiency of 4-(7H-dibenzo[c,g]carbazol-7-yl)phenyl)phosphonic acid based small-area (0.0715 cm<sup>2</sup>) device is 26.39% with high stability. Furthermore, a certified efficiency of 25.21% is achieved for a 99.12 mm<sup>2</sup> large area device.</p>

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Self-assembled materials with an ordered hydrophilic bilayer for high performance inverted Perovskite solar cells

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年1月2日

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  • Geping Qu,
  • Letian Zhang,
  • Ying Qiao,
  • Shaokuan Gong,
  • Yuanjia Ding,
  • Yuli Tao,
  • Siyuan Cai,
  • Xiao-Yong Chang,
  • Qian Chen,
  • Pengfei Xie,
  • Junyuan Feng,
  • Changqin Gao,
  • Guopeng Li,
  • Hui Xiao,
  • Fei Wang,
  • Hanlin Hu,
  • Jie Yang,
  • Shi Chen,
  • Alex K.-Y. Jen,
  • Xihan Chen,
  • Zong-Xiang Xu

摘要

While self-assembled material based inverted perovskite solar cells have surpassed power conversion efficiencies of 26%, enhancing their performance in large-area configurations remains a significant challenge. In this work, we report a self-assembled material based hole-selective layer 4-(7H-dibenzo[c,g]carbazol-7-yl)phenyl)phosphonic acid, with a π-expanded conjugation. The enhanced intermolecular π–π interactions facilitate the self-assembly of 4-(7H-dibenzo[c,g]carbazol-7-yl)phenyl)phosphonic acid molecules to form an ordered bilayer with a hydrophilic surface, which passivates the buried perovskite interface defect and enables high-quality and large-area perovskite preparation, while simultaneously enhancing interfacial charge extraction and transport. The certified efficiency of 4-(7H-dibenzo[c,g]carbazol-7-yl)phenyl)phosphonic acid based small-area (0.0715 cm2) device is 26.39% with high stability. Furthermore, a certified efficiency of 25.21% is achieved for a 99.12 mm2 large area device.