A photosensitive device includes a plurality of organic photoconductive materials disposed in a stack between a first electrode and a second electrode, including a first continuous layer of donor host material, a second continuous layer of acceptor host material, and at least one other organic photoconductive material disposed as a plurality of discontinuous islands between the first continuous layer and the second continuous layer. Each of these other photoconductive materials has an absorption spectra different from the donor host material and the acceptor host material. Preferably, each of the discontinuous islands consists essentially of a crystallite of the respective organic photoconductive material, and more preferably, the crystallites are nanocrystals.
UNITED STATES GOVERNMENT RIGHTS
This invention was made with U.S. Government support under Contract Grant No. 339 1012 DE-AC36-98-GO10337 and sub-contract XAT 5-33636-03 awarded by U.S. Department of Energy, National Renewable Energy Laboratory. The government has certain rights in this invention.