I don’t get the advangage. Say you have a lense 20/20 cm. You concentrate the energy falling onto 400 sq cm into a smaller area. But then you throw away a lot of that energy with the “clever” cooling technology so, what’s the point?
Yes some energy is lost in the cooling but that percent is much smaller than the cost efficiency gained by reducing the number of cells for the same area from 400 to 1.
Why not just use a smaller lense so the temperature doesn’t rise to the point that you have to cool it?