TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The compound (I) is a combination of syn stereochemistry or anti stereochemistry. The compound (I) is in combination with one or more dyes or an organic or inorganic material. The dye or the organic material is a chelating agent, a polymer, an oligomer or an organic copolymer. The organic or inorganic material is an electronically active material, which is a p-type electron donor material comprising phthalocyanine, subphthalocyanine and pentacene. The organic or inorganic material is an electronically active material. Preferred Method: The organic solar cell is obtainable through evaporation or solution deposition, where the cell comprises the compound (I) in combination with a dye or organic or inorganic material. The compound (I) is in the manufacture of small molecule solar cells through evaporation or solution deposition, where the dimer is optionally, in combination with one or more organic or inorganic compounds. The fused subphthalocyanine dimer (I) is adsorbed in a nanocrystalline semiconductor. The method involves providing the photoactive region involves evaporating or depositing the fused subphthalocyanine dimer from folution, where the dimer is, optionally, deposited in combination with organic or inorganic compounds. INORGANIC CHMISTRY - Preferred Components: The electronically active material is an n-type electron donor material comprising fullerene, carbon nanotubes and graphene.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The polymer, oligomer or copolymer is polyphenylenvinylene, polythiophene or its derivatives. Preferred Method: The fused subphthalocyanine dimer is covalently bound to the backbone of a polymer, oligomer or copolymer. SPECIFIC COMPOUNDS - The use of syn-(Cl,Cl)(hexadecafluoro)subphthalocyanine dimer, anti-(Cl,Cl)(hexadecafluoro)subphthalocyanine dimer, syn-(F,F)(hexadecafluoro)subphthalocyanine dimer and anti-(F,F)(hexadecafluoro)subphthalocyanine dimer is specifically claimed as (I).    EXAMPLE - No suitable example given.