A compound that can be used as a donor material in organic photovoltaic devices comprising a non-activated porphyrin fused with one or more non-activated polycyclic aromatic rings or one or more non-activated heterocyclic rings can be obtained by a thermal fusion process. By heating the reaction mixture of non-activated porphyrins with non-activated polycyclic aromatic rings or heterocyclic rings to a fusion temperature and holding for a predetermined time, fusion of one or more polycyclic rings or heterocyclic rings to the non-activated porphyrin core in meso,.beta. fashion is achieved resulting in hybrid structures containing a distorted porphyrin ring with annulated aromatic rings. The porphyrin core can be olygoporphyrins.
 This invention was made with United States Government support under grant number W15P7T-08-C-P409 awarded by the United States Department of Defense; grant number FA9550-10-1-0399 awarded by the Air Force Office of Scientific Research; and grant number DE-SC000957 awarded by the United Stated Department of Energy. The government has certain rights in the invention.