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Technology Stocks : SOITEC, Silicon-On-Insulator TEChnologies

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From: kinkblot	1/12/2015 10:52:57 AM
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Impressive technical achievement (46% efficiency). Mais y a-t-il une entreprise viable ici? December 1, 2014 announcement, coverage in Technology Review: technologyreview.com soitec.com Multi-junction solar cells are based on a selection of III-V compound semiconductor materials. The world record cell is a four-junction cell, and each of its sub-cells converts precisely one quarter of the incoming photons in the wavelength range between 300 and 1750 nm into electricity. When applied in concentrator PV, a very small cell is used with a Fresnel lens, which concentrates the sunlight onto the cell. If these cells can be made competitively (using established chip-making techniques to construct the stack), this could potentially reduce the footprint of large-scale projects by a factor of roughly 3 versus conventional solar cells. To give an example, Apple's 20MW solar farm adjacent to their data center in Maiden, North Carolina covers 171 acres. So they'd need less than 60 acres. Better yet, they could triple output from the same area and raise the solar contribution to a more significant level. The average output is perhaps one-sixth of the rated 20MW; tripling would get you to 10MW effective. With total power usage of something like 80MW, that's a more respectable 1/8 from solar.

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