Organic photovoltaic cells utilizing ultrathin sensitizing layer

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 a second organic photoconductive material over the first continuous layer to form a first discontinuous layer comprising a plurality of islands;
• depositing a third organic photoconductive material over the first discontinuous layer to form a second continuous layer;
• and
• depositing a second electrode over the second continuous layer, wherein one of the first organic photoconductive material and the second organic photoconductive material consists essentially of a donor host material, and another of the first organic photoconductive material and the second organic photoconductive material consists essentially of an acceptor host material, and
• the second organic photoconductive material is a sensitizer having an absorption spectra different from the donor host material and the acceptor host material.