News Coatings Technologies
Innovative fluorine-free hydrophobic coating boosts solar panel efficiency and durability
Researchers developed a scalable, fluorine-free hydrophobic coating for solar panels, offering self-cleaning, thermal insulation, and increased energy harvesting. The eco-friendly solution enhances performance and lifespan, especially in harsh climates.
Efficiency losses in photovoltaic (PV) panels caused by dust accumulation and overheating present a key obstacle to the widespread adoption of solar energy. A recent study has introduced a fluorine-free, industrially scalable hydrophobic coating that addresses these challenges. The innovative coating integrates UV-curable silicone-modified acrylate resin with surface-modified SiO₂ and ZnO nanoparticles, forming a hierarchical microstructure that delivers superior hydrophobicity (WCA > 140°) and strong infrared reflectivity.
This advanced coating reduces panel temperatures by up to 10 °C under solar irradiation while maintaining exceptional mechanical durability and chemical stability under UV exposure and extreme acidic or alkaline conditions. Environmental tests demonstrated a power output increase of up to 45 % for coated panels compared to uncoated ones under simulated dusty conditions, significantly improving performance retention during soiling stress.
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Eco-friendly and scalable innovation
By eliminating fluorinated compounds and employing industrially scalable spin-coating processes with high-speed UV curing, the new coating addresses critical environmental and manufacturing challenges. Its dual-functionality design—reducing fouling and thermal stress—offers a transformative solution to enhance solar farm efficiency and durability in harsh climates, supporting global decarbonisation goals.
This breakthrough represents a significant step forward in solar technology, promising increased energy harvesting, reduced maintenance costs, and improved sustainability.
Source: Jafari, P., Sabbagh Alvani, A. A., Sameie, H., Rosei, F., & Ou, J. (2026). Durable highly hydrophobic coating for solar panel with benefits of self-cleaning, thermal insulation and increased energy harvesting. Journal of Coatings Technology and Research. https://doi.org/10.1007/s11998-025-01201-9
