NOVELTY - A photoelectric conversion material that acts as an electron donor for donating an electron or an electron acceptor for accepting an electron, comprises a polymer having at least one condensed aromatic structural unit selected from graphenes with a side-chain solubilizing group.    USE - As photoelectric conversion material that acts as an electron donor for donating an electron or an electron acceptor for accepting an electron used in an organic photovoltaic cell (all claimed).    ADVANTAGE - The polymer exhibits a higher solubility in an organic solvent with the solubilizing group than without the solubilizing group. The polymer exhibits a small energy level difference between the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO), and thus has a narrow bandgap Eg. Thus, the polymer has a maximum absorption wavelength shifted to the long-wavelength side, and thus can excellently absorb a long-wavelength (near-infrared) light. Consequently, the polymer exhibits improved sunlight utilization efficiency. The polymer has a LUMO energy level lower (deeper) than those of poly(3-hexylthiophene) (P3HT). Thus a photoelectric conversion layer using the polymer as a donor in combination with the acceptor phenyl-61C-butyric acid methyl ester (PCBM) exhibits an energy loss lower than that of a layer using the donor P3HT. Consequently, organic photovoltaic cells using the polymer exhibit a high open circuit voltage Voc. The organic photovoltaic cell uses the donor of the photoelectric conversion material in combination with the acceptor (PCBM), the photoelectric conversion layer exhibits a higher absorbance coefficient, and the donor exhibits a smaller energy level difference between (HOMO) and (LUMO) (a narrower bandgap Eg), as compared with a cell using poly(3-hexylthiophene) (P3HT). The organic photovoltaic cell exhibits an active exciton generation property, improved sunlight utilization efficiency, and a high open circuit voltage Voc. Thus the organic photovoltaic cell has improved power conversion efficiency.    DETAILED DESCRIPTION - A photoelectric conversion material that acts as an electron donor for donating an electron or an electron acceptor for accepting an electron, comprises a polymer having at least one structural unit selected from graphenes of formula (I)-(IV).R1-R6=solubilizing group.    At least one of R1-R6 in each of the compound (I)-(IV) is a solubilizing group. The polymer exhibits a higher solubility in an organic solvent with the solubilizing group than without the solubilizing group. INDEPENDENT CLAIMS are included for the following:    (1) producing (M1) a photoelectric conversion material that acts as an electron donor for donating an electron or an electron acceptor for accepting an electron involving: polymerizing a phenylene derivative to prepare a polyphenylene of formula (V); and reacting the polyphenylene to prepare a polymer having at least one structural unit selected from graphenes (I)-(IV);    (2) an organic photovoltaic cell comprising the photoelectric conversion material that acts as an electron donor for donating an electron or an electron acceptor for accepting an electron, where the organic photovoltaic cell has a photoelectric conversion layer, and the photoelectric conversion layer contains, as an electron donor, the photoelectric conversion material containing the polymer (I)-(IV) and the polymer exhibits a higher solubility in an organic solvent with the solubilizing group than without the solubilizing group.    R1a-R6a=solubilizing group;    n=not defined.    At least one of R1a-R6a is a solubilizing group, and the polymer exhibits a higher solubility in an organic solvent with the solubilizing group than without the solubilizing group.