Fig. 4. Calculated mobility and Seebeck coefficient against experiment.

a Comparison of carrier mobilities, μ, at 300 K between calculations and experiments, with points colored by the conductivity effective mass $m_c^{*}$. b Comparison of Seebeck coefficients, α, at 300 K between calculations and experiments, with points colored by the majority carrier concentration n. For Si and CdS we compare directly to the diffusive component of Seebeck coefficient only. CH₃NH₃PbI₃ has been abbreviated as MAPbI₃. In (a) and (b), orange crosses indicate results computed using a constant relaxation time of 10 fs. Detailed temperature and carrier concentration results for each material are provided in Supplementary Figs. 8 and 11.