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Nanoparticles

Breakthrough in Nanotechnology: Enhancing Solar Energy Efficiency

Strategic Insights

— 1 min read

Researchers at Walter Sisulu University have made a groundbreaking discovery in the field of nanotechnology, developing a novel method to improve the efficiency of thin-film organic solar cells (TFOSCs). By incorporating silver-doped copper sulfide (CuS/Ag) metal nanoparticles into the active layer of TFOSCs, the team achieved a significant enhancement in power conversion efficiency (PCE). The device incorporating 1% CuS/Ag MNPs exhibited the highest PCE of 5.28%, outperforming the pristine reference device by over 110%.

Key Takeaways:

  • The development of thin-film organic solar cells (TFOSCs) is crucial for advancing sustainable energy technologies due to their potential for low-cost, lightweight, and flexible photovoltaic applications.
  • Silver-doped copper sulfide (CuS/Ag) metal nanoparticles (MNPs) were successfully synthesized via a wet chemical method and incorporated into a poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C61-butyric acid methyl ester (PC61BM) blend.
  • The device incorporating 1% CuS/Ag MNPs exhibited the highest power conversion efficiency (PCE) of 5.28%, outperforming the pristine reference device by over 110%.
  • The enhancement in PCE is attributed to the localized surface plasmon resonance (LSPR), which augments charge transport and increases optical absorption.
  • The CuS/Ag MNPs were characterized using ultraviolet-visible (UV-Vis) absorption spectroscopy, transmission electron microscopy (TEM), scanning electron microscopy (SEM), and energy-dispersive dispersion (EDX) analysis.
  • The research was funded by the National Research Foundation, Tertiary Education Support Program (TESP), and Eskom Holding SOC Limited.
  • The leads for this research include Xhamla Nqoro, Raymond Tichiwa Taziwa, Genene Tessema Mola, and Jude N. Ike, who collaborated with Walter Sisulu University researchers to achieve this breakthrough.

Statistics:

  • Power conversion efficiency (PCE) of 5.28% achieved by the device incorporating 1% CuS/Ag MNPs, a significant enhancement over the pristine reference device's PCE of 2.53%.
  • Over 110% increase in PCE achieved by incorporating CuS/Ag MNPs into the active layer of TFOSCs.
  • 13% increase in optical absorption observed in the UV-Vis absorption spectroscopy analysis.
  • 72.4 mV increase in short-circuit current (Jsc) observed in the SEM analysis.

Sources:

  • Controlling the Concentration of Copper Sulfide Doped With Silver Metal Nanoparticles As a Mechanism To Improve Photon Harvesting In Polymer Solar Cells. Processes, 2025;13(9):2922.
  • NewsRx. Researchers at Walter Sisulu University Report New Data on Nanoparticles (Controlling the Concentration of Copper Sulfide Doped With Silver Metal Nanoparticles As a Mechanism To Improve Photon Harvesting In Polymer Solar Cells). Electronics Newsweekly. October 21, 2025; p 1729.

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