Patent ID: 7375370

Claim:
A device comprising: a first electrode; a second electrode; a first organic photoactive region disposed between the first electrode and the second electrode; a second organic photoactive region disposed between the first electrode and the second electrode, wherein the first organic photoactive region and the second organic photoactive region are arranged in a stack between the first electrode and the second electrode; and a metal or metal substitute disposed in the stack between the first organic photoactive region and the second organic photoactive region; wherein the first organic photoactive region and the second organic photoactive region have different average absorption characteristics, and wherein the first organic photoactive region and the second organic photoactive region each has an average optical field intensity; wherein the average absorption of the first photoactive region is greater than the average absorption of the second photoactive region over a range of wavelengths λ 1 ±5%; wherein the average absorption of the second photoactive region is greater than the average absorption of the first photoactive region over a range of wavelengths λ 2 ±5%; wherein λ 2 is at least 10% greater than λ 1 ; wherein at least the first organic photoactive region or the second organic photoactive region comprises a hybrid planar-mixed heterojunction.