Fig. 2
From: New insights into the design of conjugated polymers for intramolecular singlet fission

Transient absorption data. a Transient absorption of IIDDT-Me in the diluted DCB solution is shown in a pseudo-color plot, the dotted circle highlights the triplet transient signal. b The dynamics taken from GSB at 620 nm and ESA at 720 nm are shown with kinetic traces (open circles) and fits (solid lines). c A sequential global analysis model shows three species that we assign to the photoexcited singlet (S1), triplet pair (TT), and singlet and triplet coexistence state (S1 + TT). d The normalized population concentration versus time