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<p>Graphene quantum dots (GQDs) derived from nanocellulose were prepared with and without sulfuric acid pre-treatment, and applied in dye-sensitized solar cells (DSSCs). Using nanocellulose, a renewable carbon precursor from wood pulp, supports the development of bio-based materials for bioenergy and solar-to-electric energy conversion. Although acid treatment enhanced −COOH functionalization, excessive oxidation introduced structural defects that increased charge recombination and reduced photovoltaic performance. Acid-free GQDs produced higher photocurrent density than acid-treated samples, indicating better structural preservation and charge transport. However, both systems underperformed relative to conventional N719-only cells due to limited visible-light absorption and energy-level misalignment. Overall, acid-free synthesis offers a more sustainable route to nanocellulose-derived GQDs for environmentally friendly bioenergy and solar cell applications.</p>

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Nanocellulose-derived graphene quantum dots as bioenergy-enabling materials for dye-sensitized solar cells

  • 期刊论文

  • 发表日期：

    2026年4月26日

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  • Savisha Mahalingam,
  • Abreeza Manap,
  • Kam Sheng Lau,
  • Chin Hua Chia,
  • Nurfanizan Afandi,
  • Faiz Arith,
  • P Susthitha Menon,
  • Nurul Atiqah Romli

摘要

Graphene quantum dots (GQDs) derived from nanocellulose were prepared with and without sulfuric acid pre-treatment, and applied in dye-sensitized solar cells (DSSCs). Using nanocellulose, a renewable carbon precursor from wood pulp, supports the development of bio-based materials for bioenergy and solar-to-electric energy conversion. Although acid treatment enhanced −COOH functionalization, excessive oxidation introduced structural defects that increased charge recombination and reduced photovoltaic performance. Acid-free GQDs produced higher photocurrent density than acid-treated samples, indicating better structural preservation and charge transport. However, both systems underperformed relative to conventional N719-only cells due to limited visible-light absorption and energy-level misalignment. Overall, acid-free synthesis offers a more sustainable route to nanocellulose-derived GQDs for environmentally friendly bioenergy and solar cell applications.