The next big innovation to current PV technology has been just around the corner for decades. Graphene is an exciting material with a lot of potential. Cost, however, remains the big hurdle for many of these potential game-changing ideas, including graphene.
Until Solar3D gets a manufacturing prototype done that shows the company can deliver on its claim of markedly higher power output at a competitive cost, it remains among the long list of drawing board solutions that haven't made commercial cut. The longer it takes the company to do the commercial-scale testing, the more likely it has run into some kind of substantial roadblock that, like others before it, it didn't foresee in the lab.