this beats em' all:

MIT researchers say they have successfully combined tiny proteins found in spinach with solid state electronics. Initial tests showed that the rudimentary device could convert 12 percent of the light it absorbed into an electrical charge, and researchers think they can increase that output to 20 percent by thickening the amount of biological material on the substrate.

"We have crossed the first hurdle of successfully integrating a photosynthetic protein molecular complex with a solid-state electronic device," MIT researcher Marc Baldo said.

http://www.extremetech.com/article2/...1649174,00.asp