Indium phosphide (InP) nanowires could be used to make highly efficient solar cells say researchers in Sweden and Germany. Cells made of these nanowires have efficiencies as high as 13.8% while covering only about 12% of the surface of a device. They can also convert as much as 71% of incoming sunlight with energy higher than the band gap of InP into photocurrent……

http://nanotechweb.org/cws/article/tech/52096