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<p>This study explores the potential of natural dye-sensitized solar cells (DSSCs) by incorporating carbon dots (CDs) to enhance their efficiency and stability. Despite their cost-effectiveness and environmentally friendly fabrication, DSSCs utilizing natural dyes face challenges in performance and durability in comparison to the widely popular Ru based dyes. To address these issues, the photoanode was modified with N-doped CDs (derived from <i>Citrus sinensis</i>) for optimizing the band alignment and improving the charge transport. Titanium dioxide (TiO₂) was synthesized using a microwave-assisted solvothermal approach, while CDs were prepared via a simple hydrothermal method. The champion device achieved an efficiency of 0.84%, with an open-circuit voltage (V<sub>oc</sub>) of 0.65&#xa0;V and a short-circuit current density (J<sub>sc</sub>) of 2.15&#xa0;mA/cm² under 1 sun condition. Additionally, the modified system was also tested under different light intensities and its long-term performance was evaluated for a thirty-day period.</p>

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Carbon dots doped photoanode for enhancing the efficiency of natural dye-sensitized solar cell

  • 期刊论文

  • 发表日期：

    2025年10月8日

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  • Dalal S. Bayahia

摘要

This study explores the potential of natural dye-sensitized solar cells (DSSCs) by incorporating carbon dots (CDs) to enhance their efficiency and stability. Despite their cost-effectiveness and environmentally friendly fabrication, DSSCs utilizing natural dyes face challenges in performance and durability in comparison to the widely popular Ru based dyes. To address these issues, the photoanode was modified with N-doped CDs (derived from Citrus sinensis) for optimizing the band alignment and improving the charge transport. Titanium dioxide (TiO₂) was synthesized using a microwave-assisted solvothermal approach, while CDs were prepared via a simple hydrothermal method. The champion device achieved an efficiency of 0.84%, with an open-circuit voltage (Voc) of 0.65 V and a short-circuit current density (Jsc) of 2.15 mA/cm² under 1 sun condition. Additionally, the modified system was also tested under different light intensities and its long-term performance was evaluated for a thirty-day period.