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<p>This study presents a cost-effective, eco-friendly, and sustainable approach for synthesizing silver nanoparticles (AgNPs) using Glycyrrhiza glabra root extract. The phytochemicals present in the extract act as both agents that reduce Ag + ions in the silver nitrate (AgNO<sub>3</sub>) solution and as stabilizers for the AgNPs produced. These AgNPs were then incorporated into TiO<sub>2</sub> at 0.5&#xa0;mg and 1.0&#xa0;mg concentrations to create nanocomposite photoanodes for dye-sensitized solar cells (DSSCs). The synthesized AgNPs exhibited a polycrystalline structure with a face-centered cubic lattice, as confirmed by UV–Visible spectroscopy, X-ray diffraction (XRD) analysis, and transmission electron microscopy (TEM). UV–Vis spectroscopy confirmed the successful formation of AgNPs with a surface plasmon resonance (SPR) peak at 372&#xa0;nm. Transmission electron microscopy (TEM) revealed that the AgNPs were between 20 and 50&#xa0;nm in size, a finding supported by Williamson–Hall analysis. The efficiency of the resulting dye-sensitized solar cells (DSSCs) was evaluated using J-V characteristic curves. Adding 0.5&#xa0;mg of AgNPs resulted in a substantial 15.56% improvement in the DSSC efficiency compared to devices using bare-TiO<sub>2</sub> photoanodes. Increasing the AgNP concentration to 1.0&#xa0;mg, further enhanced the efficiency by 17.19%, likely owing to a stronger plasmonic effect in the modified electrode. Electrochemical impedance spectroscopy (EIS) revealed that incorporating green-synthesized AgNPs resulted in extended electron lifetimes and lower recombination rates, resulting in better charge transfer compared to unmodified devices.</p>

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A sustainable and efficient approach for synergetic plasmonic enhancement of dye-sensitized solar cells by using green-synthesized AgNps incorporated into TiO2 photoanodes

  • 期刊论文

  • 发表日期：

    2025年6月19日

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  • Khushboo Sharma,
  • Rakhi Khandelwal,
  • Shyam Sunder Sharma,
  • Jaymin Ray,
  • Nandu B. Chaure

摘要

This study presents a cost-effective, eco-friendly, and sustainable approach for synthesizing silver nanoparticles (AgNPs) using Glycyrrhiza glabra root extract. The phytochemicals present in the extract act as both agents that reduce Ag + ions in the silver nitrate (AgNO3) solution and as stabilizers for the AgNPs produced. These AgNPs were then incorporated into TiO2 at 0.5 mg and 1.0 mg concentrations to create nanocomposite photoanodes for dye-sensitized solar cells (DSSCs). The synthesized AgNPs exhibited a polycrystalline structure with a face-centered cubic lattice, as confirmed by UV–Visible spectroscopy, X-ray diffraction (XRD) analysis, and transmission electron microscopy (TEM). UV–Vis spectroscopy confirmed the successful formation of AgNPs with a surface plasmon resonance (SPR) peak at 372 nm. Transmission electron microscopy (TEM) revealed that the AgNPs were between 20 and 50 nm in size, a finding supported by Williamson–Hall analysis. The efficiency of the resulting dye-sensitized solar cells (DSSCs) was evaluated using J-V characteristic curves. Adding 0.5 mg of AgNPs resulted in a substantial 15.56% improvement in the DSSC efficiency compared to devices using bare-TiO2 photoanodes. Increasing the AgNP concentration to 1.0 mg, further enhanced the efficiency by 17.19%, likely owing to a stronger plasmonic effect in the modified electrode. Electrochemical impedance spectroscopy (EIS) revealed that incorporating green-synthesized AgNPs resulted in extended electron lifetimes and lower recombination rates, resulting in better charge transfer compared to unmodified devices.