This is a cool application of existing technology. It increases solar cell output by a magnitude by concentrating the light along the edges of the glass or plastic panel.
http://news.cnet.com/8301-11128_3-9988923-54.html?hhTest=1
If you have access to Science, you can read the full details:
http://www.sciencemag.org/cgi/content/abstract/321/5886/226
http://news.cnet.com/8301-11128_3-9988923-54.html?hhTest=1
If you have access to Science, you can read the full details:
http://www.sciencemag.org/cgi/content/abstract/321/5886/226