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<p>The development of Pt-free counter electrodes for dye-sensitized solar cells (DSSCs) has attracted considerable attention due to the increasing demand for cost-effective and high-performance photovoltaic devices. The present study effectively synthesized and employed novel Nd<sub>2</sub>O<sub>3</sub>/C, ZnFe<sub>2</sub>O<sub>4</sub>/C, and Nd<sub>2</sub>O<sub>3</sub>/ZnFe<sub>2</sub>O<sub>4</sub>/C hybrid nanocomposites as counter electrodes for DSSC applications. The successful formation of crystalline cubic Nd<sub>2</sub>O<sub>3</sub> and spinel ZnFe<sub>2</sub>O<sub>4</sub> phases was confirmed by XRD analysis. FESEM and TEM analyses revealed the uniform distribution of nanoparticles over the conductive carbon matrix. BET analysis showed that the Nd<sub>2</sub>O<sub>3</sub>/ZnFe<sub>2</sub>O<sub>4</sub>/C hybrid possessed a high surface area of 116.3&#xa0;m<sup>2</sup>&#xa0;g⁻<sup>1</sup> with an average pore diameter of 12.6&#xa0;nm. Electrochemical studies including CV, Tafel, and EIS analyses demonstrated improved catalytic activity and faster electron-transfer kinetics for the Nd<sub>2</sub>O<sub>3</sub>/ZnFe<sub>2</sub>O<sub>4</sub>/C hybrid compared with Nd<sub>2</sub>O<sub>3</sub>/C and ZnFe<sub>2</sub>O<sub>4</sub>/C electrodes. The power conversion efficiency of the DSSC fabricated with the Nd<sub>2</sub>O<sub>3</sub>/ZnFe<sub>2</sub>O<sub>4</sub>/C counter electrode reached approximately 8.1%, approaching the performance of the Pt-based DSSC, which exhibited a power conversion efficiency of approximately 8.9%. The conductive carbon framework’s nanosized particles, porous morphology, increased surface area, and effective electron-transfer routes were primarily responsible for the enhanced photovoltaic performance. Thus, for next-generation DSSC applications, the Nd<sub>2</sub>O<sub>3</sub>/ZnFe<sub>2</sub>O<sub>4</sub>/C hybrid can be regarded as a promising low-cost and effective Pt-free counter electrode material.</p>

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Strategic design of Nd2O3/ZnFe2O4/carbon hybrid nanocomposite as an efficient Pt free counter electrode for high performance dye sensitized solar cells

  • 期刊论文

  • 发表日期：

    2026年7月17日

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  • Sivasamy Balasubramanian,
  • T. Annamalai,
  • D. Venkatesan,
  • J. Joy Priscilla,
  • V. Velmurugan,
  • N. Hemavathy

摘要

The development of Pt-free counter electrodes for dye-sensitized solar cells (DSSCs) has attracted considerable attention due to the increasing demand for cost-effective and high-performance photovoltaic devices. The present study effectively synthesized and employed novel Nd2O3/C, ZnFe2O4/C, and Nd2O3/ZnFe2O4/C hybrid nanocomposites as counter electrodes for DSSC applications. The successful formation of crystalline cubic Nd2O3 and spinel ZnFe2O4 phases was confirmed by XRD analysis. FESEM and TEM analyses revealed the uniform distribution of nanoparticles over the conductive carbon matrix. BET analysis showed that the Nd2O3/ZnFe2O4/C hybrid possessed a high surface area of 116.3 m2 g⁻1 with an average pore diameter of 12.6 nm. Electrochemical studies including CV, Tafel, and EIS analyses demonstrated improved catalytic activity and faster electron-transfer kinetics for the Nd2O3/ZnFe2O4/C hybrid compared with Nd2O3/C and ZnFe2O4/C electrodes. The power conversion efficiency of the DSSC fabricated with the Nd2O3/ZnFe2O4/C counter electrode reached approximately 8.1%, approaching the performance of the Pt-based DSSC, which exhibited a power conversion efficiency of approximately 8.9%. The conductive carbon framework’s nanosized particles, porous morphology, increased surface area, and effective electron-transfer routes were primarily responsible for the enhanced photovoltaic performance. Thus, for next-generation DSSC applications, the Nd2O3/ZnFe2O4/C hybrid can be regarded as a promising low-cost and effective Pt-free counter electrode material.