Application Of TiO₂ Microspheres In Dye-sensitized Solar Cells

Compared with traditional silicon cells, dye-sensitized solar cells(DSSCs) have many advantages, such as a long life, simple structure, easy to manufacture,and so on.Recently, in the lab, the photoelectric conversion efficiencyof small DSSCs based onTiO2 as reached13% and lager one has afforded 9.9%. The photoanode as an important part of dye-sensitized solar cells directly affects the photoelectric conversion efficiency. This paper is to study the effect of different TiO2 structuresto performance of dye-sensitized solar cells.1. We have successfully prepared TiO2 solid spheres with a diameter of about 0.5μm by a simple ultrasonic method. The Ti O2 solid spheres are used as the scattering layer of the dye-sensitized solar cells. We get a more satisfactory photoelectric conversion efficiency of 8.06%, which is higher than that of the P25 based on DSSC. it has good photoelectric conversion efficiency due to its greater light scattering ability of TiO2 solid spheres.2. We have successfully synthesized by hydrothermal method core-shell titania hollow microspheres, the structure of the shell and the core diameter of about 2-5μm and 1.1 μm. The titanium dioxide core-shell structureexhibits excellent light reflectivity. Using a core-shell structure titania microspheres as the scattering layer in DSSC, the photoelectric conversion shows 7.7%, it has significantly increased compared to P25(6.21%).3. We have successfully prepared a novel rice grain TiO2 nanostructure by a hydrothermal method. The influences ofthe thickness of rice grain TiO2 nanostructure on the photovoltaic performance of DSSCs have been investigated indetail. A power conversion efficiency of 6.3% has been obtained based onthe as prepared Ti O2 nanostructure photoelectrode 13.1μm thick, with a short-circuit current density of 10.09 mAcm-2, an open-circuitvoltage of 820 mV, and a fillfactor of 0.75.