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<p>Hole-conductor-free printable mesoscopic perovskite solar cells, fabricated by infiltrating perovskite into the preprinted porous TiO<sub>2</sub>/ZrO<sub>2</sub>/carbon triple-layer scaffold, offer an approach for the industrial production of photovoltaic panels. Here we introduce a reactive post-processing strategy using hexamethylene diisocyanate to enable efficient collection and transport of holes from the perovskite to the carbon electrode. Hexamethylene diisocyanate reacts with excess organic cations at the perovskite crystal terminations through an electrophilic reaction and reconstructs the grain boundaries and the back interface. The treatment passivates defects, facilitates hole transport in perovskite and enhances hole transfer from the perovskite to the carbon electrode. We achieve an efficiency of 23.2% for the laboratory-size device with an aperture area of 0.1 cm<sup>2</sup> and 19.4% for the minimodule with an aperture area of 57.3 cm<sup>2</sup>. The devices retain 95% of their initial efficiency after 900 h of continuous operation at the maximum power point under elevated temperatures of 55 ± 5 °C.</p>

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Enhancing hole-conductor-free, printable mesoscopic perovskite solar cells through post-fabrication treatment via electrophilic reaction

  • 期刊论文

  • 发表日期：

    2025年8月8日

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  • Yongming Ma,
  • Jiale Liu,
  • Xiayan Chen,
  • Xinran Zhao,
  • Jianhang Qi,
  • Bin She,
  • Shuang Liu,
  • Youyu Jiang,
  • Yusong Sheng,
  • Chuanzhou Han,
  • Guodong Zhang,
  • Jiayu Xie,
  • Kai Chen,
  • Yanjie Cheng,
  • Junwei Xiang,
  • Li-Ming Yang,
  • Yang Zhou,
  • Furi Ling,
  • Yinhua Zhou,
  • Anyi Mei,
  • Hongwei Han

摘要

Hole-conductor-free printable mesoscopic perovskite solar cells, fabricated by infiltrating perovskite into the preprinted porous TiO2/ZrO2/carbon triple-layer scaffold, offer an approach for the industrial production of photovoltaic panels. Here we introduce a reactive post-processing strategy using hexamethylene diisocyanate to enable efficient collection and transport of holes from the perovskite to the carbon electrode. Hexamethylene diisocyanate reacts with excess organic cations at the perovskite crystal terminations through an electrophilic reaction and reconstructs the grain boundaries and the back interface. The treatment passivates defects, facilitates hole transport in perovskite and enhances hole transfer from the perovskite to the carbon electrode. We achieve an efficiency of 23.2% for the laboratory-size device with an aperture area of 0.1 cm2 and 19.4% for the minimodule with an aperture area of 57.3 cm2. The devices retain 95% of their initial efficiency after 900 h of continuous operation at the maximum power point under elevated temperatures of 55 ± 5 °C.