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<p>This study explored the potential of natural pigments extracted from <i>Chlamydomonas starii, Coelastrella sp., Sorghum bicolor leaves</i>, and <i>Spirodela polyrhiza</i> as sensitizers in dye-sensitized solar cells (DSSCs) using TiO<sub>2</sub> as the photoanode. Characterization of TiO<sub>2</sub> via XRD, SEM, FTIR, and DRS confirmed its suitability for efficient dye adsorption and electron transport. UV–Vis spectroscopy revealed distinct absorption spectra for each dye extract, with bandgaps ranging from 1.67&#xa0;eV (<i>Coelastrella </i>sp.) to 2.87&#xa0;eV (<i>Spirodela polyrhiza</i>). Photovoltaic performance evaluation demonstrated <i>Spirodela polyrhiza</i> as the most efficient sensitizer, achieving a power conversion efficiency (PCE) of 3.685%. Furthermore, a synergistic effect was observed with a combination of <i>Sorghum bicolor</i> and <i>Chlamydomonas starii</i>, yielding a PCE of 3.762%. These findings highlight the promising potential of natural dyes, particularly from aquatic sources, for developing low-cost and sustainable DSSCs. Further research is warranted to optimize dye extraction, enhance dye-TiO<sub>2</sub> interactions, and improve long-term stability for real-world applications.</p>

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Exploring natural dyes from microalgae and plants for high-efficiency in TiO2-based dye-sensitized solar cells

  • 期刊论文

  • 发表日期：

    2025年9月17日

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  • Gbemiga Matthias Lana,
  • Victoria Olaide Adenigba,
  • Gabriel Ayinde Alamu,
  • Olayinka Joshua Oyewole,
  • Yetunde A. Ajayeoba,
  • Khadijat Kuburat Babalola,
  • Hakeem Olayinka Oyeshola,
  • Ismaila Taiwo Bello,
  • Oluwaseun Adedokun

摘要

This study explored the potential of natural pigments extracted from Chlamydomonas starii, Coelastrella sp., Sorghum bicolor leaves, and Spirodela polyrhiza as sensitizers in dye-sensitized solar cells (DSSCs) using TiO2 as the photoanode. Characterization of TiO2 via XRD, SEM, FTIR, and DRS confirmed its suitability for efficient dye adsorption and electron transport. UV–Vis spectroscopy revealed distinct absorption spectra for each dye extract, with bandgaps ranging from 1.67 eV (Coelastrella sp.) to 2.87 eV (Spirodela polyrhiza). Photovoltaic performance evaluation demonstrated Spirodela polyrhiza as the most efficient sensitizer, achieving a power conversion efficiency (PCE) of 3.685%. Furthermore, a synergistic effect was observed with a combination of Sorghum bicolor and Chlamydomonas starii, yielding a PCE of 3.762%. These findings highlight the promising potential of natural dyes, particularly from aquatic sources, for developing low-cost and sustainable DSSCs. Further research is warranted to optimize dye extraction, enhance dye-TiO2 interactions, and improve long-term stability for real-world applications.