Fig. 3From: Bi5FeTi3O15 nanofibers/graphene nanocomposites as an effective counter electrode for dye-sensitized solar cellsNyquist plots (a–d) for symmetric cells fabricated with BGr0, BGr0.5, BGr1, BGr1.5, BGr2, Gr, and Pt CEs, and inset of (b) is equivalent circuit applied to fit the Nyquist plotsBack to article page