The approach they develop likely doesn't work on Mars. They rely on the ambient high vacuum environment of the Moon as part of the silicon purification step and likely for deposition of the solar cells. Mars is not high vacuum.
I listen to a podcast by somebody that works for a company that does this kind of thing. I think he said Mars atmo is so thin that many things actually work quite well based on their calculation, but it does lead to problems in some situations.
