TiO₂/Chitosan-NH₄I(+I₂)-BMII-Based Dye-Sensitized Solar Cells with Anthocyanin Dyes Extracted from Black Rice and Red Cabbage

Figure 4

The absorption spectra of anthocyanin (a) in ethanol solution and (b) on TiO₂ extracted from black rice at pH (i) 1, (ii) 2, (iii) 3, and (iv) 4.

(a)

(b)