Gerogia Tech have demonstrated the first optical rectenna using CNTs and ALD

Using nanometer-scale components - carbon nanotubes and atomic layer deposition researchers at Gerogia Tech have demonstrated the first optical rectenna, a device that combines the functions of antennas and a rectifier diodes to convert light directly into DC current. This could be a future technology to make very efficient solar cells!

Georgia Tech associate professor Baratunde Cola measures the power produced by converting green laser illumination to electricity using the carbon nanotube optical rectenna. (Phys.org)

Youtube interview of Prof. Cola

Read more at: http://phys.org/news/2015-09-optical-rectennacombined-rectifier-antennaconverts-dc.html#jCp