Methods for producing titanium oxide sol and fine titanium oxide particles for use in photoelectric conversion devices

摘要

The method for producing a titanium oxide sol suitable for a photoelectric conversion device, and a dye-sensitized photoelectric conversion device excellent in photoelectric conversion efficiency comprises the steps of hydrolyzing an orthotitanate, and dehydrating the resultant hydrolyzate in the presence of an acid catalyst, wherein an alcohol contained in the reaction liquid is removed before the dehydrating step.