Dye-Sensitized Solar Cells Fabricated by Electrospray Coating Using TiO[sub 2] Nanocrystal Dispersion Solution

Abstract

Dye-sensitized solar cells (DSCs) were fabricated by an electrospray coating method using nanocrystal dispersion (P25) in water (DSC-ESC). They were compared with DSCs prepared by conventional coating methods (DSC-COAT). The former had higher short-circuit current than the latter. Electron lifetime and electron diffusion coefficient in layers did not vary largely between the two DSCs. Large differences were not observed between them in terms of the amount of dye molecules adsorbed on . Differences were observed only for limiting currents ( diffusion) through layers. The limiting current for DSC-ESC was higher than that of DSC-COAT. Considering the previous reports on fractal structures prepared by the ESC method and the fact that needle-like tends to grow on deposited needles by using the ESC method, we conclude that ionic paths are formed better in layers of DSC-ESC than in those of DSC-COAT.