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Published June 2013 | public
Book Section - Chapter

Graded index sol-gel antireflection coatings


We explore graded index antireflection coatings that can reduce reflection of light at the ambient/cell or ambient/module boundary at all wavelengths and incidence angles. Simulations show that graded index coatings individually enhance absorption in solar cells across nearly the entire wavelength range. Silica sol-gel coatings with varying refractive indices deposited onto glass and silicon substrates are used to form graded index coatings, and the sol-gel layer processes have been adjusted so that the refractive indices are tunable from n=1.1 to n=1.5. Reflectance measurements also show that reflectivity decreases across the entire spectrum with added solgel multilayers.

Additional Information

© 2013 IEEE. We acknowledge the Department of Energy Basic Energy Sciences, Office of Science through the Light Material Interactions Energy Frontier Research Center under contract number DE-SC0001293.

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August 19, 2023
October 17, 2023