NOVELTY - A porous titania thin film which has thin film having titania particles of average primary particle diameter 100 nm or less, on electroductive transparent substrate, is produced. Ion chosen from oxygen ion, sulfur ion, nitrogen ion, phosphorus ion, carbon ion, silicon ion, fluoride ion, chloride ion, titanium ion, zirconium ion, hafnium ion, vanadium ion, niobium ion, silver ion, tantalum ion, scandium ion, yttrium ion and lanthanum ion is injected to the thin film at acceleration voltage of 0.5-200 kV. Thus, porous titania thin film electrode material is manufactured.    USE - For manufacture of porous titania thin film electrode material for manufacture of modified porous titania thin film electrode material used for forming titania thin film electrode used as anode of dye sensitizing solar cell (all claimed).    ADVANTAGE - The dye sensitizing solar cell using the titania electrode has high efficiency and improved photoelectric conversion efficiency. Surface hydroxyl group concentration is increased by high voltage electrode discharge treatment to titania surface. Electronic trap by surface defect is suppressed, and electronic diffusibility is increased.    DETAILED DESCRIPTION - A thin film having titania particles of average primary particle diameter 100 nm or less, is formed on an electroductive transparent substrate, and porous titania thin film is produced. Ion chosen from oxygen ion, sulfur ion, nitrogen ion, phosphorus ion, carbon ion, silicon ion, fluoride ion, chloride ion, titanium ion, zirconium ion, hafnium ion, vanadium ion, niobium ion, silver ion, tantalum ion, scandium ion, yttrium ion, and lanthanum ion is injected to the titania thin film at acceleration voltage of 0.5-200 kV, such that titania particles contain the ion constituent element. Thus, a porous titania thin film electrode material is manufactured. INDEPENDENT CLAIMS are included for the following:    (1) manufacture of titania particles for electrodes;    (2) processing of titania particles for electrodes;    (3) manufacture of modified porous titania thin film electrode material;    (4) titania thin film electrode having titania thin film electrode material adsorbed with a pigment; and    (5) dye sensitizing solar cell.