Nano grass could herald cheap solar power

Vertical nano crystals of silicon that capture as much as 85 percent of the full spectrum of incoming sunlight might slash the cost of photovoltaic cells.

Scientific American: http://www.scientificamerican.com/article.cfm?id=photovoltaic-breakthroughs-brighten-outlook-for-cheap-solar-power

Reference

Nature Materials 14 February 2010