Realization of a near-perfect antireflection coating for Si solar energy

Published:2012-10-29 20:19:00 From:Editor hits：

An antireflection (AR) coating is a type of coating applied to the surface of a material to reduce light reflection and to increase light transmission [1]. The coating can improve solar collection efficiency and, therefore, the overall solar-to-electricity efficiency. As solar radiation is broadband, the AR coating needs to be effective over the entire solar spectrum from ultraviolet and visible to IR wavelengths. To ensure high collection efficiency over an entire day, the coating also has to be effective for all angles of light incidence. Hence, an ideal AR coating for solar application should maintain a low reflectance for all colors of sun light and all angles of incidence. However, the Fresnel reflection predicts a larger reflectance at larger s, except for those near the Brewster angle. This presents a fundamental constraint against the requirement of a low reflectance at all angles.

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Realization of a near-perfect antireflection coating for Si solar energy