The hybrid material consisting of a thin layer of multiwall carbon nanotubes (MWCNTs) on an -doped silicon wafer was obtained in one step using an aerosol-assisted catalytic chemical vapor deposition. The MWCNTs were grown from a mixture of acetone and ethanol with of iron polyoxomolybdate nanocluster of the keplerate-type structure. The samples produced at 800°C and 1050°C were tested as a solar energy converter. It was shown that photoresponse of the hybrid material significantly depends on the presence of structural defects in MWCNTs, being much higher in the case of more defective nanotubes. This is because defects lead to -doping of nanotubes, whereas the heterojunction between MWCNTs and silicon provides a high efficiency of the solar cell.