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<p>The growing focus on sustainable and cost-effective energy solutions has highlighted the need for Pt-free dye-sensitized solar cells (DSSCs). This study explores the incorporation of bamboo-derived dual-phase activated carbon (AC) into NiFe<sub>2</sub>O<sub>4</sub> to enhance the efficiency of conventional DSSCs. We successfully prepared NiFe<sub>2</sub>O<sub>4</sub>/AC composites with 10%, 20%, and 30% activated carbon ratios and utilized them as counter electrodes (CEs) for DSSCs. The structural and morphological characteristics of NiFe<sub>2</sub>O<sub>4</sub> and NiFe<sub>2</sub>O<sub>4</sub>/AC composites were analyzed using X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. Additionally, X-ray Photoelectron Spectroscopy (XPS) and N<sub>2</sub> adsorption-desorption studies were employed to evaluate the surface chemistry and textural properties of the CEs. The performed characterization techniques show that the NiFe<sub>2</sub>O<sub>4</sub>/AC30 composite, with 30 wt% AC, exhibits a well-defined structure and the highest specific surface area among all the samples, providing the most active sites, enhancing electron transfer, improving catalytic performance. According to the photovoltaic performance results, the NiFe₂O₄/AC30 counter electrode achieved a power conversion efficiency of 7.85%, with a short-circuit current density of 14.12&#xa0;mA/cm², open-circuit voltage of 0.75&#xa0;V and fill factor of 66%, demonstrating its excellent catalytic activity and efficiency. The results highlight the dual-phase activated carbon’s enhanced catalytic properties and its integration with NiFe<sub>2</sub>O<sub>4</sub> in significantly improving DSSC performance, showcasing its potential as an efficient and sustainable alternative for energy conversion applications.</p> Graphical Abstract <p></p>

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NiFe2O4 @ Bamboo Derived Dual Phase Activated Carbon Composite as a Counter Electrode for Pt Free Dye Sensitized Solar Cells

  • 期刊论文

  • 发表日期：

    2025年8月2日

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  • T. Annamalai,
  • D. Venkatesan,
  • P. Vinayagam,
  • D. Kanagajothi,
  • V. Rajmohan

摘要

The growing focus on sustainable and cost-effective energy solutions has highlighted the need for Pt-free dye-sensitized solar cells (DSSCs). This study explores the incorporation of bamboo-derived dual-phase activated carbon (AC) into NiFe2O4 to enhance the efficiency of conventional DSSCs. We successfully prepared NiFe2O4/AC composites with 10%, 20%, and 30% activated carbon ratios and utilized them as counter electrodes (CEs) for DSSCs. The structural and morphological characteristics of NiFe2O4 and NiFe2O4/AC composites were analyzed using X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. Additionally, X-ray Photoelectron Spectroscopy (XPS) and N2 adsorption-desorption studies were employed to evaluate the surface chemistry and textural properties of the CEs. The performed characterization techniques show that the NiFe2O4/AC30 composite, with 30 wt% AC, exhibits a well-defined structure and the highest specific surface area among all the samples, providing the most active sites, enhancing electron transfer, improving catalytic performance. According to the photovoltaic performance results, the NiFe₂O₄/AC30 counter electrode achieved a power conversion efficiency of 7.85%, with a short-circuit current density of 14.12 mA/cm², open-circuit voltage of 0.75 V and fill factor of 66%, demonstrating its excellent catalytic activity and efficiency. The results highlight the dual-phase activated carbon’s enhanced catalytic properties and its integration with NiFe2O4 in significantly improving DSSC performance, showcasing its potential as an efficient and sustainable alternative for energy conversion applications.

Graphical Abstract