[extropy-chat] Nanoengineered terrestrial solar vs.nanoengineered space solar power
pharos at gmail.com
Sat Apr 7 16:02:05 UTC 2007
On 4/7/07, spike wrote:
> > -----Original Message-----
> > From: Jay Dugger
> > Will photovoltaics degrade in-orbit...
> Yes, but the old fashioned gallium arsenide cells are remarkably durable.
> >... and by what mechanism? Radiation?
> Yes. Over time the output gradually decreases from impacts from high energy
> particles. Occasionally you get a cell shorted out from an extremely high
> energy cosmic ray that causes an SEGR or single event gate rupture. A
> particle whacks a cell hard enough to cause an ionized path across the NP
> > Corrosion?...
> Not exactly corrosion as we think of it down here, oxidation. Metals can
> migrate but I wouldn't call that corrosion.
> > Impact?
> If you meant micrometeoroid, there are so sparse they aren't a major factor.
And solar cell technology is improving all the time.
There is a lot of research in this field now as part of the move to
more 'green' technology.
But, of course, what works fine on earth may not be suitable for space.
Source: Massey University Date: April 6, 2007
Solar cell technology developed by Massey University's Nanomaterials
Research Centre will enable New Zealanders to generate electricity
from sunlight at a 10th of the cost of current silicon-based
photo-electric solar cells.
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