316045.fig.0011a
(a) F8T2/PC70BM
316045.fig.0011b
(b) F8T2/PC70BM
Figure 11: Temporal evolutions of PIAs of F8T2/PC70BM blend film due to D*, CT state, and D+: (a) fast region and (b) slow region. Solid curves in (a) are results of least-squares fitting with exponential functions: , is fixed at 0 in the PIA due to D+.