Nano World: Black silicon for solar power

Silicon surfaces rendered black by pits and bumps only nanometers or billionths of a meter large could in the future help make solar power cells more efficient.

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<p><a href="http://www.physorg.com/news70282948.html">Nano World: Black silicon for solar power</a></p> <p>Silicon surfaces rendered black by pits and bumps only nanometers or billionths of a meter large could in the future help make solar power cells more efficient.</p>