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The aim of this research was to study the usefulness of the dye obtained from cochineal to sensitize solar cells. Dye-sensitized solar cells (DSSCs) were built using indium-doped tin oxide (ITO) conductive glass coated with a layer of TiO2 particles as a photoanode and carbon as a counter electrode. An alcoholic cochineal extract was prepared, which was integrated into the TiO2 layer as a dye-sensitizer. The performance of the DSSCs was studied by light irradiation at different wavelengths and constant power. The electrochemical results showed values of VOC = 0.408 V, JSC = 0.0629 mA/cm2, FF = 0.440, and an efficiency of 3.765% when the cells were irradiated with 470 nm light. The Electrochemical Impedance Spectroscopy (EIS) results confirmed this performance by showing a low resistance to the flow of free charges at this wavelength. This study contributes to the alternative use of this organic dye in the operation of DSSC.

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Cochineal as Natural Sensitizers for Dye-Sensitized Solar Cells

  • 章节

  • 发表日期：

    2026年

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  • Nazario-Naveda Renny,
  • Gallozzo-Cárdenas Moisés,
  • Luis Angelats-Silva,
  • S. J. Rojas,
  • Cabanillas-Chirinos Luis

摘要

The aim of this research was to study the usefulness of the dye obtained from cochineal to sensitize solar cells. Dye-sensitized solar cells (DSSCs) were built using indium-doped tin oxide (ITO) conductive glass coated with a layer of TiO2 particles as a photoanode and carbon as a counter electrode. An alcoholic cochineal extract was prepared, which was integrated into the TiO2 layer as a dye-sensitizer. The performance of the DSSCs was studied by light irradiation at different wavelengths and constant power. The electrochemical results showed values of VOC = 0.408 V, JSC = 0.0629 mA/cm2, FF = 0.440, and an efficiency of 3.765% when the cells were irradiated with 470 nm light. The Electrochemical Impedance Spectroscopy (EIS) results confirmed this performance by showing a low resistance to the flow of free charges at this wavelength. This study contributes to the alternative use of this organic dye in the operation of DSSC.