Figure 1.

Chain mobility for various conjugated polymers. (a) Flash DSC instrument and heating chamber for thin film. (b) Flash DSC temperature protocols. (c) Confinement strength as a function of inverse of film thickness. (d) P3HT’s molecular structure. (e) T_g of 90 nm P3HT. (f) T_g of 40 nm P3HT. (g) PDPP’s molecular structure. (h) T_g of 82 nm PDPPT. (i) T_g of 40 nm PDPPT. (j) PM6’s molecular structure. (k) T_g of 69 nm PM6. (l) T_g of 38 nm PM6. (m) PNDI’s molecular structure. (n) T_g of 80 nm PNDI. (o) T_g of 40 nm PNDI. All samples were measured at a cooling rate of 0.1 K/s. The corresponding 1st derivative plots are presented in the inset figures for T_g values verification. For enthalpy overshoot figures, the T_g is calculated based on the graphical method by equating the two areas as shown in figures of orange and green parts by Moniyhan’s method.