Multifunctional NIR-reflective and self-cleaning UV-cured coating for solar cell applications based on cycloaliphatic epoxy resin

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• 作者：Ignazio Roppolo ; Nadia Shahzad ; Adriano Sacco ; Elena Tresso ; Marco Sangermano
• 关键词：NIR-reflective coatings ; Hydrophobic polymer surfaces ; UV-curing ; Optical properties
• 刊名：Progress in Organic Coatings
• 出版年：February, 2014
• 年：2014
• 卷：77
• 期：2
• 页码：458-462
• 全文大小：668 K

文摘

We report here a simple, cheap and scale up process for obtaining a multifunctional coating with both, IR reflective and hydrophobic properties. These coatings can be applied on solar devices in order to limit their overheating under operating conditions. The system is based on UV-curable epoxy coating containing IR-reflective fillers and a silicone additive to modify the surface properties with a good hydrophobicity enhancement. The filler dispersion into the epoxy UV-curable resin did not significantly influence the photocuring rate, while a slight decrease of the final epoxy group conversion was evidenced. The optical properties of the obtained coatings have been evaluated by UV-vis-NIR spectroscopy showing that the films act as good 鈥渇ilters鈥?in the NIR region, giving rise to a reduction of the absorbed heat and of the working temperature of the cells. A pronounced increase of hydrophobicity for the films containing the silicone additive was observed. The optical properties were not affected by the addition of the silicone additive.