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<p>Perovskite solar cells (PSCs) have emerged as promising candidates to profoundly impact the photovoltaic industry due to their high efficiency and low-cost manufacturing advantages. Nickel oxide (NiO<sub>X</sub>)-based inverted PSCs are promising candidates for advancing perovskite photovoltaics toward commercialization, leveraging their remarkable stability, scalability, and cost-effectiveness. However, the low conductivity of NiO<sub>X</sub> limits PSCs performance. Incorporating cobalt oxide (Co<sub>3</sub>O<sub>4</sub>) as a dopant enhances stability and minimizes charge loss, significantly improving hole transport properties. Co<sub>3</sub>O<sub>4</sub> incorporation shifts the valence band of NiO<sub>X</sub> films, achieving better alignment with the valence band of the perovskite layer. The optimized device achieves a peak power conversion efficiency (PCE) of 9.51%, representing a significant improvement over the 7.63% efficiency of the pristine NiO<sub>X</sub>-based device. Furthermore, it exhibits exceptional stability, retaining 82.94% of its initial PCE after 360&#xa0;h under ambient conditions (20–30% RH).</p>

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Enhanced perovskite solar cells using Co3O4/NiOX composite hole transport layers for air-stable fabrication

  • 期刊论文

  • 发表日期：

    2025年10月23日

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  • Xiangrui Deng,
  • Wenhua Qu,
  • Libo Li,
  • Hang Yang,
  • Wenyi Lu,
  • Zhixuan Wang,
  • Wenhao Xu,
  • Suo Li

摘要

Perovskite solar cells (PSCs) have emerged as promising candidates to profoundly impact the photovoltaic industry due to their high efficiency and low-cost manufacturing advantages. Nickel oxide (NiOX)-based inverted PSCs are promising candidates for advancing perovskite photovoltaics toward commercialization, leveraging their remarkable stability, scalability, and cost-effectiveness. However, the low conductivity of NiOX limits PSCs performance. Incorporating cobalt oxide (Co3O4) as a dopant enhances stability and minimizes charge loss, significantly improving hole transport properties. Co3O4 incorporation shifts the valence band of NiOX films, achieving better alignment with the valence band of the perovskite layer. The optimized device achieves a peak power conversion efficiency (PCE) of 9.51%, representing a significant improvement over the 7.63% efficiency of the pristine NiOX-based device. Furthermore, it exhibits exceptional stability, retaining 82.94% of its initial PCE after 360 h under ambient conditions (20–30% RH).