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<p>For improved dye-sensitized solar cells and energy storage, holmium-doped TiO₂ nanoparticles were created by fast solution combustion and sensitised using Murraya koenigii leaf dye. Successful Ho incorporation and enhanced device performance were verified by structural and electrochemical investigations. With a noteworthy power conversion efficiency of 6.73%, Voc of 0.75&#xa0;V, Jsc of 14.27&#xa0;mA/cm², and fill factor of 0.63, DSSCs constructed with 5&#xa0;mol% Ho-doped TiO₂ outperformed pure TiO₂ devices (PCE 3.49%, Voc 0.75&#xa0;V, Jsc 7.55&#xa0;mA/cm², FF 0.61). Along with strong cycle retention and enhanced conductivity, the Ho-doped electrodes also achieved a specific capacitance of 480&#xa0;F/g (at 1&#xa0;A/g), energy density of 65 Wh/kg (at 3000&#xa0;W/kg), and power density of 9000&#xa0;W/kg (at 13 Wh/kg). These improvements are the consequence of effective natural dye sensitisation combined with holmium’s stimulation of charge separation and inhibition of recombination. The method creates multipurpose photoanodes for sustainable solar and storage applications by combining green chemistry with rare-earth alteration.</p>

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Sustainable enhancement of photovoltaic and energy-storage performance using Murraya koenigii dye-sensitized holmium-doped TiO₂ photoanodes

  • 期刊论文

  • 发表日期：

    2026年1月13日

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  • P. Vivek

摘要

For improved dye-sensitized solar cells and energy storage, holmium-doped TiO₂ nanoparticles were created by fast solution combustion and sensitised using Murraya koenigii leaf dye. Successful Ho incorporation and enhanced device performance were verified by structural and electrochemical investigations. With a noteworthy power conversion efficiency of 6.73%, Voc of 0.75 V, Jsc of 14.27 mA/cm², and fill factor of 0.63, DSSCs constructed with 5 mol% Ho-doped TiO₂ outperformed pure TiO₂ devices (PCE 3.49%, Voc 0.75 V, Jsc 7.55 mA/cm², FF 0.61). Along with strong cycle retention and enhanced conductivity, the Ho-doped electrodes also achieved a specific capacitance of 480 F/g (at 1 A/g), energy density of 65 Wh/kg (at 3000 W/kg), and power density of 9000 W/kg (at 13 Wh/kg). These improvements are the consequence of effective natural dye sensitisation combined with holmium’s stimulation of charge separation and inhibition of recombination. The method creates multipurpose photoanodes for sustainable solar and storage applications by combining green chemistry with rare-earth alteration.