We report the electropolymerization of poly(3-methylthiophene) (P3MT) in mesoporous titania. X-ray photoelectron spectroscopy (XPS) depth-profiling experiments confirm that the polymer filled the pores continuously from the bottom electrode to the top surface of the mesoporous titania. Photovoltaic cells with this structure show 0.23% power efficiency under 3.3mW/cm2 514 nm monochromatic illumination.
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