NOVELTY - A dye-sensitized solar cell (1) comprises a transparent conductive substrate (10), a photoelectrode (30) formed with an inverse opal structure on the transparent conductive substrate, dye molecules (40) adsorbed on the photoelectrode, a counter electrode (50) disposed to face the transparent conductive substrate, and an electrolyte (70) filled between the substrate and counter electrode. The photoelectrode comprises organic surface-treated transition metal oxide nanoparticles.    USE - Dye-sensitized solar cell.    ADVANTAGE - The dye-sensitized solar cell has enhanced light amplification effect and long-term stability by ensuring an efficient path for infiltration of polymer with a high viscosity or solid electrolyte, via ordered bulk-pores. The transition metal oxide nanoparticles have excellent dispersibility. The organic surface-treated titanium oxide particles have excellent electron transportability, thus defining an effective electron transport path and improving photonic conversion efficiency. The titanium oxide nanoparticles also enhance the amount of adsorbed dyes and increase the current density.    DETAILED DESCRIPTION - A dye-sensitized solar cell comprises a transparent conductive substrate, a photoelectrode formed with an inverse opal structure on the transparent conductive substrate, dye molecules adsorbed on the photoelectrode, a counter electrode disposed to face the transparent conductive substrate, and an electrolyte filled between the substrate and counter electrode. The photoelectrode comprises organic surface-treated transition metal oxide nanoparticles. The surface of transition metal oxide nanoparticles is coated with a hydrophobic organic material, which is ketone or alcohol-based compound. The transition metal oxide nanoparticles include titanium dioxide, zinc oxide, and/or tin dioxide, and/or one or more of titanium dioxide having anatase crystallinity. The dye-sensitized solar cell has a sacrifice layer comprising colloidal particles, provided on a transparent conductive substrate. The colloidal particles are organic polymer particles or inorganic particles. The inorganic particles contain silica. An INDEPENDENT CLAIM is included for fabrication of dye-sensitized solar cell.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the dye-sensitized solar cell having photoelectrode(s).    Dye-sensitized solar cell (1)    Transparent conductive substrate (10)    Photoelectrode (30)    Dye molecules (40)    Counter electrode (50)    Electrolyte (70)