Influence of modification of counter electrode on photoelectric properties of dye-sensitized TiO2 Solar cells

A dye-sensitized nanocrystalline TiO2 solar cell(DYSC) was assembled, of which counter electrode was modified already by platinum, nickel and carbon. It was found that the DYSC had better photoelectric performance when the electrode was modified by platinum than by nickel and carbon. The influence of the incidence light wavelength on the incidence monochromatic photoelectric conversion efficiency (IPCE) was investigated. The result shows that the IPCE mainly depends on the short-circuit current density(I-SC) of a DYSC, and the IPCE reaches 48.32% under the irradiation with the wavelength of 560 nm when the counter electrode of a DYSC was modified by platinum. The influence of incident light intensity on the photoelectric properties of a DYSC was also investigated. It was found that the I-SC and open-circuit voltage (V-OC) increased and the fill factor(f(f)) of the DYSC decreased with the increase of the incident light intensity.