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<p>As an emerging class of photovoltaic devices, dye-sensitized solar cells (DSSCs) offer several unique advantages, including stable performance under indoor and low-light conditions, compatibility with flexible and transparent substrates, ease of fabrication, and low production costs. This study aims to enhance the power conversion efficiency (<i>PCE</i>) of p-type DSSCs by employing a novel photoactive nanocomposite, NiO@Cr@fullerene, synthesized by decorating chromium (Cr)-doped nickel oxide (NiO) onto a fullerene support. The NiO@Cr@fullerene nanocomposite was successfully synthesized via a hydrothermal method and used as the photocathode in p-type DSSCs. Field emission scanning electron microscope (FESEM) and transmission electron microscope (TEM) images revealed porous clusters of NiO nanoparticles with a homogeneous distribution of chromium and fullerene. The chemical and crystallographic characteristics of the NiO@Cr@fullerene nanocomposite were confirmed through energy dispersive X-ray spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and Raman spectroscopy. UV–Vis absorption studies revealed that the incorporation of Cr and fullerene enhanced the visible light absorption of the working electrode by shifting the absorption onset into the visible region, resulting in a significant reduction of the band gap from 3.34&#xa0;eV for pristine NiO to 2.94&#xa0;eV for the nanocomposite. The p-type DSSC with NiO@Cr@fullerene as the photocathode demonstrated a ~ 25.8% increase in the PCE. This photovoltaic improvement, driven by a substantial increase in the short-circuit current density from 3.38&#xa0;mA&#xa0;cm⁻<sup>2</sup> to 4.29&#xa0;mA&#xa0;cm⁻<sup>2</sup>, was attributed to enhanced opto-electrical properties, including broader solar absorption and faster electron transport.</p>

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Fullerene-supported Cr-doped NiO as a high-performance photocathode for p-type DSSCs

  • 期刊论文

  • 发表日期：

    2025年10月31日

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  • Nidhi Prajapati,
  • Ravi P. Jaiswal

摘要

As an emerging class of photovoltaic devices, dye-sensitized solar cells (DSSCs) offer several unique advantages, including stable performance under indoor and low-light conditions, compatibility with flexible and transparent substrates, ease of fabrication, and low production costs. This study aims to enhance the power conversion efficiency (PCE) of p-type DSSCs by employing a novel photoactive nanocomposite, NiO@Cr@fullerene, synthesized by decorating chromium (Cr)-doped nickel oxide (NiO) onto a fullerene support. The NiO@Cr@fullerene nanocomposite was successfully synthesized via a hydrothermal method and used as the photocathode in p-type DSSCs. Field emission scanning electron microscope (FESEM) and transmission electron microscope (TEM) images revealed porous clusters of NiO nanoparticles with a homogeneous distribution of chromium and fullerene. The chemical and crystallographic characteristics of the NiO@Cr@fullerene nanocomposite were confirmed through energy dispersive X-ray spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and Raman spectroscopy. UV–Vis absorption studies revealed that the incorporation of Cr and fullerene enhanced the visible light absorption of the working electrode by shifting the absorption onset into the visible region, resulting in a significant reduction of the band gap from 3.34 eV for pristine NiO to 2.94 eV for the nanocomposite. The p-type DSSC with NiO@Cr@fullerene as the photocathode demonstrated a ~ 25.8% increase in the PCE. This photovoltaic improvement, driven by a substantial increase in the short-circuit current density from 3.38 mA cm⁻2 to 4.29 mA cm⁻2, was attributed to enhanced opto-electrical properties, including broader solar absorption and faster electron transport.