NOVELTY - A composition (c1) comprises a colloid solution containing a nanocrystalline oxide material; and an aqueous base solution.    USE - For a semiconductor electrode of a dye-sensitized solar cell (claimed).    ADVANTAGE - Dye-sensitized solar cell manufactured using the composition for the semiconductor electrode have excellent photoelectric conversion efficiency. The nanoparticles are sintered even at a low temperature less than or equal to 150 degrees C.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for:    (a) manufacturing (m1) the composition involving preparing a colloid solution containing a nanocrystalline oxide material by causing a hydrothermal reaction between the nanocrystalline oxide material and a solvent; replacing the solvent for the colloid solution with an alcohol through a substitution reaction; and adding an aqueous base solution to the colloid solution obtained through the substitution reaction;    (b) a dye-sensitized solar cell comprising a semiconductor electrode (10) obtained by coating a paste composition (14) on a conductive substrate; an opposite electrode (20); and an electrolyte solution (30) interposed between the semiconductor and opposite electrode. The paste composition comprises the composition (c1); and    (c) manufacturing (m2) the dye-sensitized solar cell involving coating the composition (c1) of a semiconductor electrode on a first conductivity type substrate; drying the first conductivity type substrate coated with the composition at room temperature to ~200degreesC; forming a dye molecular layer on the first conductivity type substrate to obtain the semiconductor electrode; coating a conductive material on a second conductivity type substrate to form an opposite electrode; and interposing an electrolyte solution between the semiconductor electrode and the opposite electrode.    DESCRIPTION OF DRAWING(S) - The figure shows a simplified diagram illustrating configuration of a dye-sensitized solar cell.    semiconductor electrode (10)    transparent conductive substrate (12)    paste composition (14)    opposite electrode (20)    electrolyte solution. (30)