Figure 2.

Photo of F-DSCs and SEM images of CNT CEs. (a) The photo of two F-DSCs using CNTs and Pt as CEs, respectively. Inset is a schematic structure of F-DSCs. (b) The side view SEM image of a BCNT fibrous CE; (c) and (d) are top view SEM images of FTO-coated CNTs and bare CNTs, respectively.