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<p>The present study aims to synthesize PANI/SnO<sub>2</sub> nanocomposites as a counter electrode for dye-sensitized solar cells which can replace traditional Pt electrodes which suffers from high cost and stability concerns. The PANI/SnO<sub>2</sub> nanocomposites were prepared using the co-precipitation method at various pH levels, and the effects of pH on the structural, morphological, optical, and functional properties were investigated using scanning electron microscopy (SEM), powder X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Energy Dispersive X-ray Analysis (EDAX), and Electrochemical impedance analysis. The SEM micrographs reveal a coral reef-like morphology and the size of the nanoparticles are observed to decrease with increase in the pH. XRD analysis indicates that samples prepared at high pH are more crystalline. Additionally, the optical properties of the nanocomposite were measured using UV spectroscopy. The synthesized PANI/SnO₂ nanocomposite was deposited onto fluorine-doped tin oxide (FTO) substrates via the doctor blade method, and its electrochemical performance was analysed through Electrochemical Impedance Spectroscopy (EIS). Nyquist plots were used to evaluate the interface charge transfer kinetics. The nanocomposite sample prepared at pH = 10 has higher electron transfer with low series resistance. The results suggest that the optimized PANI/SnO₂ nanocomposite exhibits superior charge transport properties, making it a cost-effective and efficient alternative to platinum counter electrodes in DSSCs.</p>

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Effects of pH on the synthesis of PANI-Tin oxide nanocomposite as counter electrode in DSSC applications

  • 期刊论文

  • 发表日期：

    2025年5月6日

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  • Nouf Alharbi,
  • Hala Siddiq,
  • Malak Refaei,
  • R. Ashega Sherly,
  • Rajesh Paulraj,
  • Sasi Florence

摘要

The present study aims to synthesize PANI/SnO2 nanocomposites as a counter electrode for dye-sensitized solar cells which can replace traditional Pt electrodes which suffers from high cost and stability concerns. The PANI/SnO2 nanocomposites were prepared using the co-precipitation method at various pH levels, and the effects of pH on the structural, morphological, optical, and functional properties were investigated using scanning electron microscopy (SEM), powder X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Energy Dispersive X-ray Analysis (EDAX), and Electrochemical impedance analysis. The SEM micrographs reveal a coral reef-like morphology and the size of the nanoparticles are observed to decrease with increase in the pH. XRD analysis indicates that samples prepared at high pH are more crystalline. Additionally, the optical properties of the nanocomposite were measured using UV spectroscopy. The synthesized PANI/SnO₂ nanocomposite was deposited onto fluorine-doped tin oxide (FTO) substrates via the doctor blade method, and its electrochemical performance was analysed through Electrochemical Impedance Spectroscopy (EIS). Nyquist plots were used to evaluate the interface charge transfer kinetics. The nanocomposite sample prepared at pH = 10 has higher electron transfer with low series resistance. The results suggest that the optimized PANI/SnO₂ nanocomposite exhibits superior charge transport properties, making it a cost-effective and efficient alternative to platinum counter electrodes in DSSCs.