Engineers have long known that a double-sided solar cell design would increase cells' overall harnessing power. The main barrier to creating such a double-cells was an economic one. However, one solar startup claims they have figured out a way to tweak the production process to make "bifacial" designs economically feasible.

We were already impressed with transparent and flexible solar panels, but now those brainiacs at MIT have gone and topped that, printing one on a piece of paper for the first time ever. They did this with a process that...