Extended Data Fig. 1: N-DMBI’s R_a vs solvents and polymer.

The R_a between N-DMBI and 2DPP-2CNTVT is equal to that of N-DMBI and o-DCB this means that N-DMBI is equally likely to interact with either of them. N-DMBI’s R_a to CB is larger than that of 2DPP-2CNTVT meaning that the dopant will more likely interact with the CP.