Patent ID: 7897429

Claim:
A method of fabricating a photosensitive optoelectronic device, comprising: depositing a first organic photoconductive material over a first electrode to form a first continuous layer; depositing at least three discontinuous layers of photoconductive material directly over the first continuous layer, material of each discontinuous layer being in direct contact with material of at least one adjacent discontinuous layer, wherein said at least three discontinuous layers form a bulk heterojunction; depositing a second organic photoconductive material directly over the discontinuous layers to form a second continuous layer; and depositing a second electrode over the second continuous layer, wherein at least one of the discontinuous layers and one of the continuous layers are composed of donor materials and form continuous pathways for conduction of holes therebetween, at least one of the discontinuous layers and an other of the continuous layers are composed of acceptor materials and form continuous pathways for conduction of electrons therebetween, and at least one of the discontinuous layers is composed of a third organic photoconductive material having an absorption spectra different from the donor and acceptor materials.