Figure 3
Intensity dependences of the transient absorption kinetics of the (a) PBDTfDTBT:PC[70]BM (1:1.5) and (b) PBDTfDTBSe:PC[70]BM (1:1) blends at various excitation fluence (ph/cm2/pulse). The fluences are color coded as follows: 2.8 × 1014 (black, ☆), 9.4 × 1013 (dark yellow, +), 5.7 × 1013 (blue, Δ), 2.8 × 1013 (dark cyan, ○), 9.4 × 1012 (magenta, □). (c) PBDTfDTBO:PC[70]BM (1:1) blend at various excitation fluence (ph/cm2/pulse). The fluences are color-coded as follows: 3.6 × 1014 (black, ☆), 1.23 × 1014 (dark yellow, +), 6.15 × 1013 (blue, Δ), 3.69 × 1013 (dark cyan, ○). Fitting in green is performed specifically for the results for the PBDTfDTBO:PC[70]BM (1:1) blend. The red fits shows the fitting results obtained for the PBDTfDTBO:PC[70]BM (1:1) blend with the model used for the other two blends.
