Copper sulfide nanoparticles and single-walled carbon nanotubes help increase efficiency whilst also reducing costs.
"In lab tests, the new thin-film structure showed increases by as much at 80 percent in light absorption when compared to single-walled nanotube thin-film devices alone, making it a more efficient generator."
Image source; http://inhabitat.com
Article source; http://www.nanowerk.com/
