This is interesting but I’m not sure I see a very big market for this:
Conventional solar technology soaks up rays of incoming sunlight to bump out a voltage. Strange as it seems, some materials are capable of running in reverse, producing power as they radiate heat back into the cold night sky.
So far, the prototype only generates a small amount of power, and is probably unlikely to become a competitive source of renewable power on its own – but coupled with existing photovoltaics technology, it could harness the small amount of energy provided by solar cells cooling after a long, hot day’s work.
I could see potential in places where your conventional resources are scarce but have lots of open sky and very little or no sun. Winter in the extreme latitudes would be an example.Perhaps in some deep space applications. Waste heat (even inadvertent heat losses through a roof or walls) or geothermal sources could perhaps provide enough electricity to run an instrument package or something.