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<p>NiO/rGO nanocomposites have been synthesized by the hydrothermal method. The various amounts of prepared NiO/rGO nanocomposite were incorporated with perovskite material for fabricating the perovskite solar cells (PSCs). The structure of NiO/rGO-CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> based PSC is FTO/c-TiO<sub>2</sub>/m-TiO<sub>2</sub>/NiO/rGO-CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub>/Carbon. The present NiO/rGO-CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> based PSC obtained a power conversion efficiency (PCE) of 15.27 % with a short circuit current (J<sub>sc</sub>) of 23.90&#xa0;mA/cm<sup>2</sup>, an open circuit voltage (V<sub>oc</sub>) of 0.94&#xa0;V and a fill factor (FF) of 0.68. In contrast, the pristine CH₃NH₃PbI₃-based PSC exhibited a PCE of only 8.57 %. The incorporation of NiO/rGO enhanced the charge recombination resistance and improved the interfacial contact, which remarkably facilitated the charge separation, charge transfer and charge collection and effectively suppressed the charge recombination in the PSCs. NiO/rGO-CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> based PSCs preserved 93.27 % of their initial PCE after 600&#xa0;h, which endorses that the stability of the CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> layer is secured from moisture by the incorporation of NiO/rGO nanocomposite. The obtained power conversion efficiency and stability of NiO/rGO-CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> based PSCs is higher than that of the pristine CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> based PSC. The current work clearly demonstrates that the incorporation of NiO/rGO nanocomposite improves the performance and stability of PSCs, simplifies the device fabrication process and reduces the fabrication cost.</p> Graphical Abstract <p></p>

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Improving the performance of perovskite solar cells by incorporating NiO/rGO nanocomposite into CH3NH3PbI3

  • 期刊论文

  • 发表日期：

    2026年5月5日

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  • V. Arjun,
  • K.P. Muthukumaran,
  • A. Nithya,
  • M. Yoshimura,
  • P. Manikandan,
  • S. Karuppuchamy

摘要

NiO/rGO nanocomposites have been synthesized by the hydrothermal method. The various amounts of prepared NiO/rGO nanocomposite were incorporated with perovskite material for fabricating the perovskite solar cells (PSCs). The structure of NiO/rGO-CH3NH3PbI3 based PSC is FTO/c-TiO2/m-TiO2/NiO/rGO-CH3NH3PbI3/Carbon. The present NiO/rGO-CH3NH3PbI3 based PSC obtained a power conversion efficiency (PCE) of 15.27 % with a short circuit current (Jsc) of 23.90 mA/cm2, an open circuit voltage (Voc) of 0.94 V and a fill factor (FF) of 0.68. In contrast, the pristine CH₃NH₃PbI₃-based PSC exhibited a PCE of only 8.57 %. The incorporation of NiO/rGO enhanced the charge recombination resistance and improved the interfacial contact, which remarkably facilitated the charge separation, charge transfer and charge collection and effectively suppressed the charge recombination in the PSCs. NiO/rGO-CH3NH3PbI3 based PSCs preserved 93.27 % of their initial PCE after 600 h, which endorses that the stability of the CH3NH3PbI3 layer is secured from moisture by the incorporation of NiO/rGO nanocomposite. The obtained power conversion efficiency and stability of NiO/rGO-CH3NH3PbI3 based PSCs is higher than that of the pristine CH3NH3PbI3 based PSC. The current work clearly demonstrates that the incorporation of NiO/rGO nanocomposite improves the performance and stability of PSCs, simplifies the device fabrication process and reduces the fabrication cost.

Graphical Abstract