| abstract |
Improved organic photovoltaic cells including a composition useful for forming an active layer which comprises (a) at least one p-type material, (b) at least one n-type material, (c) at least one first solvent and (d) at least one second solvent, wherein the first solvent is different from the second solvent, and the first solvent comprises at least one alkylbenzene or benzocyclohexane, and the second solvent comprises at least one carbocyclic compound. The second solvent can be used in lesser amounts but can improve efficiency in cells. |