Organic Dyes Containing Coplanar Dihexyl-Substituted Dithienosilole Groups for Efficient Dye-Sensitised Solar Cells

Figure 7

(a) J-V characteristics of N719 and Si dye (CL-1)-sensitised DSSC under standard AM 1.5 testing conditions. Si dye showed a V_oc, J_sc, FF, and η (%) of 0.742, 14.4, 65, and 6.90, respectively. N719 showed a V_oc, J_sc, FF, and η (%) of 0.745, 17.4, 62, and 8.05, respectively. (b) IPCE spectra of these cells displayed an increased absorbance over the spectral region (500–750 nm) for N719, but a relatively lower absorbance in the 400–470 nm region compared with Si dye.

(a)

(b)