Re: How to make money fast (in science fiction)

On 2008-04-11, Luke Campbell <lwcamp@[EMAIL PROTECTED]
> wrote:
> so photons will go through the layers until they hit the layer where
> they have just slightly more energy than the band gap, where they
> are absorbed and deliver almost all their energy as electrical work.

Materials with band gaps close to thermal energies are very poor
semiconductors.  So it still relies on having a hot radiator and cold
absorber.  The closer in temperature they are, the less efficient the
photocell can be.


- Tim