Fig. 2

Charge transport and optical properties of polymers in this study. a Structures of IDT-X₂BT, IDTT-X₂BT, and TIF-X₂BT with X = H and F. Transfer characteristics (b), gate voltage dependence of mobilty (c) and output characteristics (d) for IDT-H₂BT (red) and TIF-H₂BT (blue). e PDS absorption and (f) normalised PL spectra of the six polymers