Structural and chemical descriptors of conjugated polymers correlated with av. At least three intrinsic features are largely correlated (i.e., |R| or |ρ| ≥ 0.7, where R corresponds to the Pearson correlation coefficient) with av in either amorphous (blue circles) or semi-crystalline (orange squares) conjugated polymers. a, The persistence length,lp. b, The total mass of the repeat unit including the side chains. c, The mass of the side chains only. The dotted lines correspond to polynomial fits of the scattered data serving as guide-to-the-eye. The shaded areas limit the corresponding 95% confidence bands. The insets show the repeat unit of PFO with the atoms considered in the calculation of the mass colored in blue.