19 Apr '11, 11am

Solar Junction Breaks Concentrated Solar World Record with 43.5% Efficiency

What is 1,000 suns and how do concentrator photovoltaics (CPV) work?: The sun shines a certain amount of energy onto each 5.5 mm x 5.5 mm surface on the earth, and that is, of course, how much sunlight the 5.5 mm x 5.5 mm cell is exposed to, but, to save money on the expensive photovoltaic material, a small piece of it is used (like the 5.5 mm cell mentioned) to generate electricity while concentrators (such as mirrors, for example) are used to concentrate 400 to 1,000 times the amount of sunlight the cell would normally be exposed to onto it. Sadly, this concept does not work for traditional solar cells due to excessive degradation unless someone could find a way to keep them cool.

Full article: http://cleantechnica.com/2011/04/19/solar-junction-breaks...

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