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Discussion in 'Off-Topic Members Lounge' started by shrtrnd, Jan 11, 2014.

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  1. shrtrnd


    Jan 15, 2010
    Interesting to me, thought I'd share it:
    NASA Tech Briefs January 2014
    Applications Silicon Vs Gallium Arsenide
    Silicon solar cell panels are less efficient than Gallium Arsenide
    On top of that, gallium arsenide runs 10% cooler than silicon.
    On top of that, as silicon heats-up, it becomes even less efficient, and
    gallium arsenide panels are virturally unaffected by heat.
    In practical terms, the article claimed gallium arsenide panels overall are
    about 50% more efficient than silicon solar cell panels.
  2. Harald Kapp

    Harald Kapp Moderator Moderator

    Nov 17, 2011
    The backside of GaAs solar cells is their price. That's why they are used in space technology, but not on your roof.
  3. shrtrnd


    Jan 15, 2010
    I figured they weren't cheap. The article was geared toward use in automobile rooftops.
    Like anything else, the price will drop if there's a large market for them.
    I re-read the article. The gallium arsenide cells run 10 degrees C, cooler, not 10%.
    I'm in Arizona, where car temperatures are unusually high. Considering the rapidly
    increasing electrical requirements of of car accessories, and the other pros of the
    article, it caught my attention.
    Hey, Hybrids are just in their infancy.
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