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<p>In the present work, zinc oxide (ZnO) with few-layer graphene was investigated for dye-sensitized solar cells (DSSCs). Four architectures were fabricated using indium tin oxide (ITO)/0.1&#xa0;wt% graphene-ZnO/aluminum (Al), ITO/0.2&#xa0;wt% graphene-ZnO/Al, ITO/0.3&#xa0;wt% graphene-ZnO/Al, and ITO/0.4&#xa0;wt% graphene-ZnO/Al composites. Few-layer graphene and ZnO were synthesized using electrochemical exfoliation and the sol–gel method. The prepared composites were characterized using X-ray diffraction (XRD), field scanning electron microscopy (FESEM), transmission electron microscopy (TEM), thermogravimetry differential thermal analysis (TG–DTA), photoluminescence (PL), and ultraviolet–visible (UV–Vis) spectroscopy. The ITO/0.4&#xa0;wt% graphene-ZnO/Al composite-based DSSC exhibited a power conversion efficiency of 11.31%, which is significantly higher than that of the 0.1&#xa0;wt%, 0.2&#xa0;wt%, and 0.3&#xa0;wt% DSSCs. The enhancement in various optoelectronic properties is attributed to the presence of few layer graphene, which facilitates efficient transports of photogenerated electron.</p>

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Band gap engineering for highly efficient dye sensitized solar cell using graphene-ZnO nanorods

  • 期刊论文

  • 发表日期：

    2025年6月28日

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  • Pursing Babulal Rathod,
  • Sandeep Anandrao Waghuley

摘要

In the present work, zinc oxide (ZnO) with few-layer graphene was investigated for dye-sensitized solar cells (DSSCs). Four architectures were fabricated using indium tin oxide (ITO)/0.1 wt% graphene-ZnO/aluminum (Al), ITO/0.2 wt% graphene-ZnO/Al, ITO/0.3 wt% graphene-ZnO/Al, and ITO/0.4 wt% graphene-ZnO/Al composites. Few-layer graphene and ZnO were synthesized using electrochemical exfoliation and the sol–gel method. The prepared composites were characterized using X-ray diffraction (XRD), field scanning electron microscopy (FESEM), transmission electron microscopy (TEM), thermogravimetry differential thermal analysis (TG–DTA), photoluminescence (PL), and ultraviolet–visible (UV–Vis) spectroscopy. The ITO/0.4 wt% graphene-ZnO/Al composite-based DSSC exhibited a power conversion efficiency of 11.31%, which is significantly higher than that of the 0.1 wt%, 0.2 wt%, and 0.3 wt% DSSCs. The enhancement in various optoelectronic properties is attributed to the presence of few layer graphene, which facilitates efficient transports of photogenerated electron.