Photoelectric Performance Optimization of Dye-Sensitized Solar Cells Based on ZnO-TiO₂ Composite Nanofibers

Figure 3

SEM images (a1)–(f1), fiber diameter distributions (a2)–(f2), EDS spectra (a3)–(f3) and element ratio charts (illustration of ( a3)–(f3)) of TiO₂ nanofibers and ZnO-TiO₂ composite nanofibers with molar ratios of 1 : 4, 1 : 2, 1 : 1, 2 : 1, and 4 : 1.

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