Figure 9From: Effect of variation of average pore size and specific surface area of ZnO electrode (WE) on efficiency of dye-sensitized solar cellsVariation of open-circuit voltage ( V oc ) versus the mesoporous ZnO samples synthesized using different concentrations of NaOH. The concentrations used were 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, and 0.5 M. The samples were calcinated at 315°C for 12 h.Back to article page