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<p>In this study, <i>Maytenus ilicifolia</i>, a native South American plant known for antioxidant properties, is explored as a natural dye for DSSC. The dye solar device was assembled with natural sensitizer, TiO<sub>2</sub> as an anode, Pt as counter electrode, and I<sub>3</sub><sup>−</sup>/3I<sup>−</sup> as electrolyte. The presence of auxochromes and chromophore groups in dye composition suggests its potential as a sensitizer. Electrochemical characterization demonstrated a current of 0.45&#xa0;mA&#xa0;cm<sup>−2</sup> under illumination, with PCE of 0.183% and FF equal to 0.610. Temperature dependence analysis using a Peltier cell showed a decrease in V<sub>OC</sub> from 510 to 410&#xa0;mV at temperatures of 17.5&#xa0;°C and 39.0&#xa0;°C, respectively. The thermal sensitivity was calculated with a voltage drop of -9&#xa0;mV/°C, suggesting a strong dependence on temperature, mainly due to enhanced recombination at higher temperatures. These findings suggest that DSSC using Maytenus ilicifolia may perform more efficiently in cooler environments, where recombination losses are minimized.</p>

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Photovoltaic and thermodynamic analysis of maytenus ilicifolia as a natural dye for DSSC

  • 期刊论文

  • 发表日期：

    2025年7月10日

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  • Letícia Fernanda Gonçalves Larsson,
  • Jéssica de Lara Andrade,
  • Marilei de Fátima Oliveira,
  • Ana Paula Peron,
  • Everson do Prado Banczek,
  • Gideã Taques Tractz

摘要

In this study, Maytenus ilicifolia, a native South American plant known for antioxidant properties, is explored as a natural dye for DSSC. The dye solar device was assembled with natural sensitizer, TiO2 as an anode, Pt as counter electrode, and I3−/3I− as electrolyte. The presence of auxochromes and chromophore groups in dye composition suggests its potential as a sensitizer. Electrochemical characterization demonstrated a current of 0.45 mA cm−2 under illumination, with PCE of 0.183% and FF equal to 0.610. Temperature dependence analysis using a Peltier cell showed a decrease in VOC from 510 to 410 mV at temperatures of 17.5 °C and 39.0 °C, respectively. The thermal sensitivity was calculated with a voltage drop of -9 mV/°C, suggesting a strong dependence on temperature, mainly due to enhanced recombination at higher temperatures. These findings suggest that DSSC using Maytenus ilicifolia may perform more efficiently in cooler environments, where recombination losses are minimized.