Improving the Efficiency of Dye-Sensitized Solar Cells by Growing Longer ZnO Nanorods on TiO₂ Photoanodes

Figure 6

Cross-sectional SEM micrographs of the ZnO-TiO₂ interface in the photoanode: (a) the ZnO-TiO₂ interface whose ZnO nanorods were grown at 70°C; (b) an enlarged section of the ZnO-TiO₂ interface whose ZnO nanorods were grown at 70°C; and (c) free-standing ZnO-TiO₂ interface whose ZnO nanorods were grown at 80°C.

(a)

(b)

(c)