Extracting active layer and device fabrication details often required digging through the paper's supplementary information or references. D:A ratios were not consistently reported, requiring reviewers to refer to the paper's methods section in order to calculate them from the total solids concentrations of the individual (D and A) solutions. Additionally, some papers reported either active layer thickness or spin coating speed, as they are related. Thus, the reporting of these parameters was inconsistent across papers. For optional fabrication features (solvent additive and concentration, thermal annealing temperature and time) it was assumed that if they were not reported, they were not used.