30 Jun '11, 1pm

More CPV Funding: Semprius Gets $20M from Siemens, et. al.: Semprius, a developer of concentrating photovoltai...

The Semprius GaAs double-junction cells measure 600 microns by 600 microns, 300 times smaller than the standard industry cells, which in turn results in fewer defects, better quality, and the use of less current and therefore less heat through the cell, according to Bob Conner, the VP of Photovoltaics at Semprius. Smaller chips also mean smaller optical elements and simpler optics, as well as a smaller module size. Less heat means that Semprius can dispense with the heat sinks and heat spreaders used by the majority of CPV players. Conner hails CPV as having the highest conversion efficiency, lowest temperature degradation and the highest capacity factor of all solar power technologies. Semprius claims a 32 percent efficiency at 1,000 suns for their double-junction cells. A silicone-on-glass lens array concentrates the sunlight onto a small glass ball lens which illuminate...

Full article: http://www.greentechmedia.com/articles/read/more-cpv-fund...

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greentechmedia.com 17 Jun '11, 3pm

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