Fig. 3: Femtosecond transient absorption kinetics.

a PG-IT pristine film, b PM6:PG-IT blend film, and c PG-IT2F blend film with excitation at 840 nm. d Transient spectra of PM6:PG-IT blend at selective delay times. Transient kinetic traces probing at e 560 nm and f 636 nm for the PM6:PG-IT (black) and PM6:PG-IT2F (red) blend. Source data are provided as a Source Data file.