And then, if they could package these sheets folded like corrugated cardboard stiffeners they could greatly increase the surface area within any given frame or panel size. Think of ordinary cardboard with one of the outer skin sheets peeled off.
“they could greatly increase the surface area within any given frame or panel size.”
That type of surface area increase is good for filtration or gas exchange, but won’t increase insolation at all. It would be like having a flat panel angled away from the sun.
Put it on a wide-angle collector, though, and it may help.