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<p>Developing multifunctional interfacial materials is critical in solving the poor interfacial contact and severe charge recombination in perovskite solar cells (PSCs). Here, based on low-cost green biomass cellulose, pyridine with varied N-positions is incorporated to produce esterified cellulose C-<i>m</i>-Py and C-<i>p</i>-Py as the electron-selective interface layer between tin oxide (SnO<sub>2</sub>) and perovskite. It was found that C-<i>m</i>-Py with the N atom at the <i>meta</i>-position shows a higher dipole moment and wellmatched energy alignment compared to C-<i>p</i>-Py. Importantly, C-<i>m</i>-Py can simultaneously enhance the conductivity of SnO<sub>2</sub> and passivation capacity toward perovskite, leading to improved interfacial charge extraction efficiency. Consequently, the C-<i>m</i>-Py-based PSCs deliver a remarkably high efficiency of 24.35%, along with excellent thermal stability. This study demonstrates a facile and cost-effective way to design efficient interfacial materials by the simple functionalization of renewable sources in nature.</p>

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N-position effect of pyridine-functionalized cellulose on interfacial properties for efficient and stable perovskite solar cells

  • 期刊论文

  • 发表日期：

    2025年6月25日

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  • Zilong Zhang,
  • Chunming Liu,
  • Can Wang,
  • Jiading Liang,
  • Lusheng Liang,
  • Xiaozhen Huang,
  • Dandan Song,
  • Yang Wang,
  • Liulian Huang,
  • Lihui Chen,
  • Abd. Rashid bin Mohd Yusoff,
  • Peng Gao,
  • Hui Wu

摘要

Developing multifunctional interfacial materials is critical in solving the poor interfacial contact and severe charge recombination in perovskite solar cells (PSCs). Here, based on low-cost green biomass cellulose, pyridine with varied N-positions is incorporated to produce esterified cellulose C-m-Py and C-p-Py as the electron-selective interface layer between tin oxide (SnO2) and perovskite. It was found that C-m-Py with the N atom at the meta-position shows a higher dipole moment and wellmatched energy alignment compared to C-p-Py. Importantly, C-m-Py can simultaneously enhance the conductivity of SnO2 and passivation capacity toward perovskite, leading to improved interfacial charge extraction efficiency. Consequently, the C-m-Py-based PSCs deliver a remarkably high efficiency of 24.35%, along with excellent thermal stability. This study demonstrates a facile and cost-effective way to design efficient interfacial materials by the simple functionalization of renewable sources in nature.