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Nanoporous "Black Silicon" by a Nanocatalyzed Etch: Photovoltaic Anti-Reflection and Simple Physics from a Graded-Density Surface Layer

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We fabricate nanoporous "black-silicon" surfaces by a low-cost nanocatalyzed liquid etch and find an exponential decay of reflectance versus the wavelength-scaled density grade depth. Using this surface in place of conventional anti-reflection coating, we have fabricated confirmed 16.8%-efficient silicon solar cells. Article not available.

© 2009 Optical Society of America

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