Figure 2From: A novel hierarchical Pt- and FTO-free counter electrode for dye-sensitized solar cellElectrochemical characters. Nyquist plots (a) and Tafel polarization curves (b) of DSSCs based on PEDOT/FTO CE, TiO2-PEDOT:PSS/PEDOT:PSS/glass CE, and Pt/FTO CE.Back to article page