Fig. 1From: Bi5FeTi3O15 nanofibers/graphene nanocomposites as an effective counter electrode for dye-sensitized solar cells a XRD patterns of the BFTO, BGr, and Gr. b Room-temperature Raman spectra of BFTO, BGr, and Gr. c Partial enlargement drawing from (b). d UV-vis spectrum of BFTO, BGr, and Gr. e The plot of (αhv)1/2 as a function of photon energy hv around the absorption edge for BFTO, BGr, and Gr, respectivelyBack to article page