Pilot-scale manufacture of Cu(InGa)Se2 films on a flexible polymer substrate

Cu(InGa)Se₂ films were deposited in a multi-source inline evaporation system onto a 6-inch wide polyimide/Mo web. The materials properties of the Cu(InGa)Se₂ films were characterized along and across the web over a five-foot length. Thickness and composition are uniform within measurement error and larger variations were found from deposition to deposition. Average device performance over a five-foot length was between 8 to 9% and the best cell had an efficiency of 12.1%. A Ga-In-Se precursor layer deposited on the polyimide/Mo web improved adhesion of the Cu(InGa)Se₂ film.