250397.fig.003
Figure 3: Photocurrent density-voltage characteristics of solar cells sensitized by N719 (Device A), N719 : 4L (1 : 0.25) (Device B), N719 : 4L (1 : 0.5) (Device C), and N719 : 4L (1 : 1) (Device D) with 12.0 + 4.0 μm double layers nanocrystalline TiO2 electrodes.