Figure 7.

Nyquist spectra (measured under light illumination (100 mW cm-2)) of DSSCs. The inset represents the impedance spectra expanded in the high frequency ranges. The scattered points are experimental data, and the solid lines are the fitting curves.

Sudhagar et al. Nanoscale Res Lett 2011 6:30   doi:10.1007/s11671-010-9763-2