Figure 3: Exciton and polaron pair dynamics.
From: Structural correlations in the generation of polaron pairs in low-bandgap polymers for photovoltaics
ΔT/T spectra recorded at different pump-probe delay times for the co-polymers PCPDT-BDT (a), PCPDT-BT (b) and PCPDT-2TTP (c). P1 and P2 indicate the polaron transitions, while Ex the excitonic transiton from S1 to Sn. The insets in (b) and (c) compare the normalized dynamics for excitons (red curve) and polaron pairs (black curve) on a time scale of 20 ps.
