Figure 2From: Efficient p-type dye-sensitized solar cells with all-nano-electrodes: NiCo2S4 mesoporous nanosheet counter electrodes directly converted from NiCo2O4 photocathodesMicrostructure of the nanosheets. (a, b) TEM images of nanosheet films, indicating that nanosheets are composed of mesopores. (c) N2 adsorption-desorption and pore-size distribution curves. (d) Lattice fringes and SAED pattern (inset) of the nanosheet.Back to article page