Scholarlink

<p>Perovskite solar cells have attracted considerable attention due to their remarkable efficiency and potential for low-cost production. However, their performance is still impeded by defect states and non-radiative recombination. To mitigate this issue, pyromellitic diimide (PD) is employed as an additive to passivate bulk defects in perovskite materials, effectively inhibiting non-radiative recombination and minimizing energy loss within the system. Experimental investigations demonstrate that PD forms hydrogen bonds with formamidinium (FA<sup>+</sup>) ions and coordinates with Pb<sup>2+</sup> ions, thereby effectively passivating defects. After being treated with PD, the perovskite film exhibits enhanced crystallinity and improved uniformity. As a result of suppressed non-radiative recombination, the solar cell achieves a high open-circuit voltage of 1.193 V along with a power conversion efficiency of 25.79% in 1.55 eV perovskite solar cells. Furthermore, the PD-treated unpackaged device shows improved stability, retaining 96% of its initial efficiency after 2000 h under a nitrogen atmosphere. This study offers valuable insights into developing effective passivation strategies that address defects in perovskite materials.</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

Pyromellitic diimide-mediated bulk passivation for efficient perovskite solar cells with low energy loss

  • 期刊论文

  • 发表日期：

    2025年11月21日

查看全文
  • Gangfeng Su,
  • Zongzhi Yang,
  • Jing Chen,
  • Wenfeng Kang,
  • Dailian Wang,
  • Juanjuan Wei,
  • Runnan Yu,
  • Yun Yan,
  • Zhan’ao Tan

摘要

Perovskite solar cells have attracted considerable attention due to their remarkable efficiency and potential for low-cost production. However, their performance is still impeded by defect states and non-radiative recombination. To mitigate this issue, pyromellitic diimide (PD) is employed as an additive to passivate bulk defects in perovskite materials, effectively inhibiting non-radiative recombination and minimizing energy loss within the system. Experimental investigations demonstrate that PD forms hydrogen bonds with formamidinium (FA+) ions and coordinates with Pb2+ ions, thereby effectively passivating defects. After being treated with PD, the perovskite film exhibits enhanced crystallinity and improved uniformity. As a result of suppressed non-radiative recombination, the solar cell achieves a high open-circuit voltage of 1.193 V along with a power conversion efficiency of 25.79% in 1.55 eV perovskite solar cells. Furthermore, the PD-treated unpackaged device shows improved stability, retaining 96% of its initial efficiency after 2000 h under a nitrogen atmosphere. This study offers valuable insights into developing effective passivation strategies that address defects in perovskite materials.