• D:A ratios were not always reported, but could often be calculated based on the reported donor and acceptor concentrations. Additionally, when papers reported data from multiple devices with different D:A ratios, they often reported a range of D:A ratios (e.g., 1:1.1 to 1:1.6). In this case, we took the center of the range of weight ratios (e.g., 1:1.35). • When solvents were presented as a mixture, they were often reported as a percentage by volume (% v/v). From this, a ratio of the solvents presented was calculated (e.g., 15%, v/v = 6.667:1). • When recording reported solvent additives, some papers would include the additive, but not provide the additive percentage. In these cases, the solvent additive was included, while the concentration (%) was omitted, resulting in an incomplete data point. • If a solvent system was reported as a ternary mixture (e.g., o-DCB:CB:DIO 1:1:0.3), the minority solvent was recorded as an additive and its concentration was calculated from the ratio. • If active layer thickness for a particular device was not reported in a paper, we substituted the thickness of a similar device in the same paper if the total solids concentration and spin coating speed were the same. Otherwise, the data point was omitted.