Thiadiazole Fused Subporphyrazines as Acceptors in Organic Photovoltaic Cells

A series of archetypal photovoltaic cells with a fully-subporphyrinoid planar heterojunction was fabricated by the thermal vacuum evaporation technique. The donor component of this junction was a boron subphthalocyanine chloride, while the acceptor component was perfluorinated subphthalocyanine or its heterocyclic analogues in which one, two or three tetrafluorobenzene ring(s) were substituted by the 1,2,5-thiadiazole ring(s) using the recently described synthetic approach. The photovoltaic parameters of such cells were measured and compared to those of the reference cell with the conventional fullerene C60 as electron acceptor.