Effect of Solvent, Dye-Loading Time, and Dye Choice on the Performance of Dye-Sensitized Solar Cells

Figure 2

Current-voltage curves for DSSC devices prepared with (a) 3, (c) 5, (e) 7, and 10 μm thick titania films impregnated with N-719 dye at impregnation times from 3 to 18 hours. Quantum efficiency curves for DSSC devices prepared with (b) 3, (d) 5, (f) 7, and 10 μm thick titania films impregnated with N-719 dye at impregnation times from 3 to 18 hours. The vertical axes on (a), (c), and (e) show increased current for increased impregnation time for all devices. The vertical axes on (b), (d), and (f) show less improvement of quantum efficiency as films are made thicker. The quantum efficiency peaks at 15 hours for 10 μm thick films (f).

(a)

(b)

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(d)

(e)

(f)