8 March 2014 Comparison of bioinspired hillock and pit textures for silicon solar cells
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Abstract
Inspired by the apposition compound eyes of some dipterans, we analyzed the effect of texturing the exposed face of a silicon solar cell by ray-tracing simulation. Bioinspired textures of two types were considered: hillock textures and pit textures. A multifrequency analysis-that took into account the broadband nature of solar radiation and its amplitude at the sea-level, as well as the wavelength dependence of the complex-valued refractive index of silicon-showed that both types of bioinspired textures are beneficial. We found that the light-coupling efficiency can be enhanced by as much as 20% and 24% with respect to that of a flat surface when the exposed face of a silicon solar cell is decorated with the bioinspired hillock texture and the bioinspired pit texture, respectively.
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Francesco Chiadini, Vincenzo Fiumara, Antonio Scaglione, Akhlesh Lakhtakia, "Comparison of bioinspired hillock and pit textures for silicon solar cells", Proc. SPIE 9055, Bioinspiration, Biomimetics, and Bioreplication 2014, 90550T (8 March 2014); doi: 10.1117/12.2041742; https://doi.org/10.1117/12.2041742
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