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Particle size-dependent adhesion forces and wind removal efficiency of anti-soiling coatings on textured solar glasses

: Ilse, K.K.; Gurumoorthy, H.N.; Bahattab, M.A.; Alqahtani, S.H.; Mirza, M.; Glaubitt, W.; Naumann, V.; Hagendorf, C.; Bagdahn, J.


MRS communications 9 (2019), No.3, pp.964-970
ISSN: 2159-6867
ISSN: 2159-6859
Journal Article
Fraunhofer IMWS ()

Soiling can lead to severe performance losses of photovoltaic (PV) plants. Within this study, three different anti-soiling coatings (ASC) were applied to three different commercial, solar-grade rolled glasses with different surface structures. Laboratory soiling experiments were performed including wind simulation and a novel rotational force test to assess the influence of different surface structures of the glass substrate on the anti-soiling performance of the coatings. A detailed microscopic evaluation indicates a consistent ranking of the ASC with regard to particle resuspension behavior for both test methods and all substrates. Furthermore, the rotational force test yields a quantitative measure of the median force needed for particle removal from the respective coating, which is independent of the glass substrate surface morphology.