Sol–gel processed silica based highly transparent self-cleaning coatings for solar glass covers

Publication date: Available online 16 February 2020Source: Materials Today: ProceedingsAuthor(s): Deepanjana Adak, Raghunath Bhattacharyya, Hiranmay Saha, Pradipta Sankar MaitiAbstractIn order to enhance performance and reliability of photovoltaic modules (PV), it is very essential to keep the PV modules clean. Although there are good number of available technologies to clean the glass covers of solar panels, however, self-cleaning coatings, with extreme wettability, is emerging as one of the most reliable solution which can be easily applied and at the same time comes with low cost. Such coatings should be not only good at keeping the PV modules clean but at the same time should maintain the transparency of solar glass covers so as to allow maximum light to enter the surface of encapsulated solar panels. Most importantly such self-cleaning glazing structures have become very much useful in diverse field of solar energy application areas, such as solar radiation transmission, building integrated photovoltaics (BIPV), solar panels, concentrated solar power (CSP) systems. Here we have developed a facile sol–gel based highly transparent and self-cleaning coating with tunable wetting property, by synthesizing single component silane modified base and acid catalyzed mixed silica sol. The sol is coated by following dip-coating approach on glass substrates. A static contact angle (WCA) as high as 150° and contact angle hysteresis (CAH) of ∼2° has been ach...
Source: Materials Today: Proceedings - Category: Materials Science Source Type: research

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