Fabrication is extremely simple, so labor costs will be low.
Light energy is wasted, and the cells produce only a weak dribble of current.
Now each ruthenium dye has a donor just 2 Anstroms away, its electron able to hop into the hole before the departing electron has a chance to turn around and hop back. That's good, because the more the back reaction is inhibited, the more time the dye spends in an excited state, and the more electrons make the circuit. And therefore about 50 percent more efficient. Eventually, Meyer would like to make the cells solid-state with no liquid iodine. If you do that with visible light, we're all famous and can retire to Hawaii.