Well,
You might increase the efficiency of the panel, but that would be irrelevant to the whole scheme of things. . . You gotta get the liquid nitrogen somehow. Then you have to keep it cold or it'll want to expand and run away with you, then you have to have a bunch of them to get any usable power output, then. . .
This is getting kinda weird here. . .
Sometimes in the end the most elegant solution is the best one. . .
Run the danged thing naked and anjoy the power it produces!
Doug