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<p>This study investigates the synthesis, characterization, and application of TiO<sub>2</sub>-reduced graphene oxide (rGO)/silver (Ag) ternary nanocomposites for improving the efficiency of dye-sensitized solar cells (DSSCs). The nanocomposites were synthesized using a solvothermal method, with simultaneous <i>in situ</i> reduction of graphene oxide and silver ions using ammonia. The structural, morphological, and optical properties of the synthesized materials were characterized using Raman spectroscopy, Fourier transform infrared (FT-IR) spectroscopy, x-ray diffraction (XRD), scanning electron microscopy (SEM), UV–Vis spectroscopy, and photoluminescence spectroscopy. The photovoltaic performance of DSSCs fabricated with these nanocomposites was evaluated through current–voltage measurements and electrochemical impedance spectroscopy. The results demonstrated that the incorporation of rGO and Ag significantly improved electron transport, reduced charge recombination, and enhanced light absorption due to the plasmonic effect of Ag. The optimized DSSC, containing 1&#xa0;wt.% rGO and 2&#xa0;wt.% Ag, achieved maximum efficiency of 6.3%, representing a substantial improvement over pure TiO<sub>2</sub>-based cells. This study highlights the potential of TiO<sub>2</sub>-rGO-Ag ternary nanocomposites as efficient photoanodes for high-performance DSSCs.</p>

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Enhancing the Efficiency of Dye-Sensitized Solar Cells Using TiO2-rGO-Ag Ternary Nanocomposites: A Comprehensive Study on Synthesis, Characterization, and Photovoltaic Performance

  • 期刊论文

  • 发表日期：

    2025年8月29日

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  • Mohammad Mahdi Goodarzi,
  • Seyed Mohammad Mirkazemi,
  • Amir Masoud Arabi

摘要

This study investigates the synthesis, characterization, and application of TiO2-reduced graphene oxide (rGO)/silver (Ag) ternary nanocomposites for improving the efficiency of dye-sensitized solar cells (DSSCs). The nanocomposites were synthesized using a solvothermal method, with simultaneous in situ reduction of graphene oxide and silver ions using ammonia. The structural, morphological, and optical properties of the synthesized materials were characterized using Raman spectroscopy, Fourier transform infrared (FT-IR) spectroscopy, x-ray diffraction (XRD), scanning electron microscopy (SEM), UV–Vis spectroscopy, and photoluminescence spectroscopy. The photovoltaic performance of DSSCs fabricated with these nanocomposites was evaluated through current–voltage measurements and electrochemical impedance spectroscopy. The results demonstrated that the incorporation of rGO and Ag significantly improved electron transport, reduced charge recombination, and enhanced light absorption due to the plasmonic effect of Ag. The optimized DSSC, containing 1 wt.% rGO and 2 wt.% Ag, achieved maximum efficiency of 6.3%, representing a substantial improvement over pure TiO2-based cells. This study highlights the potential of TiO2-rGO-Ag ternary nanocomposites as efficient photoanodes for high-performance DSSCs.