Metal Oxide Dispersion, Metal Oxide Electrode Film, and Dye Sensitized Solar Cell

A metal oxide dispersion for the production of a dye-sensitized solar cell electrode, comprising Metal Oxide Particle Group F having a necking structure formed by m connected particles, Metal Oxide Particle Group G having only 0.2 m or less connected particles, and a solvent, and being formable into a film at 200° C. or less.

A metal oxide dispersion, wherein when said metal oxide dispersion is coated on a transparent electrically conducting resin substrate to an area of 1 cm2 and film-formed at 150° C. and an N3 dye is adsorbed thereto, and when the resulting electrode film is disposed to oppose an FTO transparent electrically conducting glass having a platinum-iodine-based electrolyte into the space therebetween, the Nyquist plotting is performed under the open voltage condition with irradiation of pseudo sunlight of 100 mW, the minimum value of the impedance imaginary number part in the circular arc including 20 Hz is from −25 to −0.01Ω.

A method for producing an electrode for dye-sensitized solar cells, comprising stacking metal oxide fine particles differing in the composition to enhance the light usability within the electrode.

A dye-sensitized solar cell having an electrode surface area of 5 cm2 and formed on a resin substrate, wherein when the Nyquist plotting is performed under the open voltage condition with irradiation of pseudo sunlight of 100 mW, the minimum value of the impedance imaginary number part in the circular arc including 20 Hz is from −25 S to −0.01 SΩ.

A metal oxide electrode comprising an electrically conducting substrate having thereon a metal oxide layer comprising metal oxide particles bound by a binder, wherein the binder content is from 0.005 to 5 mass % based on the metal oxide film and the metal oxide layer has a pencil scratch strength of H or more according to JIS5600.

A method for producing a metal oxide electrode, comprising coating a metal oxide liquid dispersion comprising a metal oxide particle, a hydrophilic binder and a solvent on an electrically conducting substrate and drying it to form a metal oxide layer comprising metal oxide particles bound by a hydrophilic binder.