Room Temperature Deposition of TiO2 Using Nano Particle Deposition System (NPDS): Application to Dye-Sensitized Solar Cell (DSSC)

To apply for the working electrode of dye-sensitized solar cell (DSSC), semiconducting TiO2 powder is deposited on indium tin oxide (ITO)-coated glass. In conventional DSSC fabrication, the high-temperature sintering process should be contained to make the necking of powders, and to assemble powders and,substrate. In this research, do; TiO2 powder is deposited using a nano particle deposition system (NPDS) to make photoelectrode layer through spraying at room temperature conditions. The powder is sprayed through a slit-type nozzle having a 0.4 x 10mm(2) rectangular outlet under atmospheric chamber pressure. Through XRD analysis and FE-SEM observation, the deposition of the semiconductor oxide powder is confirmed and the thickness (7.6 mu m) is measured. The fabricated DSSC has a short circuit current density J(SC) = 3.077mA/cm(2), open circuit voltage V-OC = 0.709V, and energy efficiency eta = 1.24%.