| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a photoelectrode for a dye-sensitized photoelectric conversion element having a porous structure, having a large specific surface area, carrying a large amount of a sensitizing dye, and capable of diffusing an electrolytic solution constituting an electrolyte layer into the tiny structure of a porous semiconductor layer composed of fine particles, and a method for manufacturing the same. <P>SOLUTION: A porous semiconductor layer 11 composed of fine particles is formed by applying metal-oxide semiconductor nanoparticle dispersions necessarily containing metal-oxide semiconductor nanoparticles and a solvent to a conductive substrate by spraying, and applying heat treatment. The metal-oxide semiconductor nanoparticles are a mixture of nanoparticles composed of primary particles having an average size of 10 to 30 nm, and nanoparticles composed of primary particles having an average size of 40 to 70 nm. The solvent is a mixture of water and an alcohol having a carbon number of 5 or smaller. The concentrations of the solid contents composed of the metal-oxide semiconductor nanoparticles in the dispersions satisfy the following: the concentration of the nanoparticles having an average size of 10 to 30 nm is in the range of 1 to 15 wt.%, the concentration of the nanoparticles having an average size of 40 to 70 nm is in the range of 0.1 to 25 wt.%, and the total concentration of the nanoparticles is in the range of 5 to 30 wt.%. <P>COPYRIGHT: (C)2013,JPO&INPIT |
