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<p>This study presents the synthesis and application of a novel ternary TiO<sub>2</sub>-WO<sub>3</sub>-GO nanocomposite as a photoanode material to improve the efficiency of dye-sensitized solar cells (DSSCs). The composite was prepared via a simple hydrothermal approach and analyzed using energy-dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), and scanning electron microscopy (SEM), all of which verified the successful integration of TiO<sub>2</sub>, WO<sub>3</sub>, and graphene oxide (GO). Additionally, X-ray diffraction (XRD) and Fourier-transform infrared spectroscopy (FTIR) were employed to confirm the formation of the GO and WO₃ components. To enhance DSSC performance, the influence of different GO concentrations (0.01–0.03&#xa0;g) on charge transfer and light absorption properties was explored. The findings revealed that the inclusion of GO improved light absorption, while WO<sub>3</sub> reduced electron–hole recombination and facilitated efficient electron transfer within the nanocomposite. The optimal photoanode performance was observed at a GO concentration of 0.025&#xa0;g, which resulted in a DSSC with a significant enhancement in short-circuit current density (15.3&#xa0;mA/cm<sup>2</sup>), open-circuit voltage (0.763&#xa0;V), fill factor (0.68), and power conversion efficiency (8.3%). These improvements demonstrate the superior performance of TiO<sub>2</sub>-WO<sub>3</sub>-GO photoanodes compared to those solely based on TiO<sub>2</sub> or TiO<sub>2</sub>-WO<sub>3</sub>.</p>

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Enhancing photovoltaic performance of DSSCs using novel TiO2-WO3-GO nanostructured photoanodes

  • 期刊论文

  • 发表日期：

    2025年7月29日

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  • S. Fallahdoost Moghadam,
  • N. Gilani,
  • A. A. Yousefi

摘要

This study presents the synthesis and application of a novel ternary TiO2-WO3-GO nanocomposite as a photoanode material to improve the efficiency of dye-sensitized solar cells (DSSCs). The composite was prepared via a simple hydrothermal approach and analyzed using energy-dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), and scanning electron microscopy (SEM), all of which verified the successful integration of TiO2, WO3, and graphene oxide (GO). Additionally, X-ray diffraction (XRD) and Fourier-transform infrared spectroscopy (FTIR) were employed to confirm the formation of the GO and WO₃ components. To enhance DSSC performance, the influence of different GO concentrations (0.01–0.03 g) on charge transfer and light absorption properties was explored. The findings revealed that the inclusion of GO improved light absorption, while WO3 reduced electron–hole recombination and facilitated efficient electron transfer within the nanocomposite. The optimal photoanode performance was observed at a GO concentration of 0.025 g, which resulted in a DSSC with a significant enhancement in short-circuit current density (15.3 mA/cm2), open-circuit voltage (0.763 V), fill factor (0.68), and power conversion efficiency (8.3%). These improvements demonstrate the superior performance of TiO2-WO3-GO photoanodes compared to those solely based on TiO2 or TiO2-WO3.