Calculation of photonic energy bands of self-assembled-type TiO2 photonic crystals as dye-sensitized solar battery

The photonic energy bands of the inverse-opal solar cell were calculated. The finite difference time domain method was applied to the analysis of both hexagonal closest packed (hcp) and face-centered cubic (fcc) structures of the TiO2-electrolyte photonic crystal. The electrolyte, which filled the calculated photonic crystals, was set as an acetonitrile system. The calculated photonic energy bands were compared with the experimental scattering spectra.