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<p>This study explores the optimization of SiO<sub>x</sub>C<sub>y</sub>:H thin films fabricated under varying radio frequency power conditions to achieve enhanced water repeal while preserving photovoltaic (PV) performance. Thin films derived from hexamethyldisiloxane were deposited on glass substrates via plasma-enhanced chemical vapor deposition (PECVD). The sessile drop technique was used to assess the water contact angle. Our findings indicate that SiO<sub>x</sub>C<sub>y</sub>:H films deposited at 200&#xa0;W and 300&#xa0;W exhibit hydrophilic behavior (θ &lt; 90°), whereas the film produced at 100&#xa0;W achieves hydrophobicity (θ &gt; 90°), optimizing surface wettability for water-repellent applications. Notably, applying the 100&#xa0;W film to a solar cell resulted in minimal efficiency loss (0.47%) and only a 1% decrease in fill factor, confirming that PV performance remained practically unaltered. These findings highlight the potential of SiO<sub>x</sub>C<sub>y</sub>:H thin films fabricated at optimized conditions to provide effective protection against moisture without compromising solar cell functionality.</p>

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Hydrophobic SiOxCy:H thin films deposited by PECVD for photovoltaic module protection

  • 期刊论文

  • 发表日期：

    2025年8月12日

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  • Ahmed Kotbi,
  • Pierre Barroy,
  • Michael Lejeune,
  • Ilham Hamdi Alaoui,
  • Abdoul-Azizou Aziraf AFO,
  • Andreas Zeinert,
  • Mustapha Jouiad

摘要

This study explores the optimization of SiOxCy:H thin films fabricated under varying radio frequency power conditions to achieve enhanced water repeal while preserving photovoltaic (PV) performance. Thin films derived from hexamethyldisiloxane were deposited on glass substrates via plasma-enhanced chemical vapor deposition (PECVD). The sessile drop technique was used to assess the water contact angle. Our findings indicate that SiOxCy:H films deposited at 200 W and 300 W exhibit hydrophilic behavior (θ < 90°), whereas the film produced at 100 W achieves hydrophobicity (θ > 90°), optimizing surface wettability for water-repellent applications. Notably, applying the 100 W film to a solar cell resulted in minimal efficiency loss (0.47%) and only a 1% decrease in fill factor, confirming that PV performance remained practically unaltered. These findings highlight the potential of SiOxCy:H thin films fabricated at optimized conditions to provide effective protection against moisture without compromising solar cell functionality.