Importantly, we demonstrate a new, easily adaptable cHTR deposition system that allows for the rapid combinatorial screening of quasi-2D RPPs. We tracked all experimental deposition conditions and parameters to serve as an additional productivity measure and reproducibility check (Supporting Information). This high-throughput system employed pre-cut and prepatterned substrate reported by us earlier, along with a microfluidic precursor solution agitating and dosing system. The substrates were thoroughly cleaned and then automatically coated with NiO following the previously reported method (see Supplementary Information for exact fabrication details). By accurately controlling the precursor aliquots via pre-defined strokes of programmable syringe pump (Chemyx 4000), we were able to quickly and accurately fabricate any given perovskite system. In short, the proposed cHTR system allows us to mitigate the impact of human-induced error, thus improving the lab-to-lab and user-to-user reproducibility. This systematic automated DoE is a promising step towards fully unbiased, rapid exploration and population of vast compositional spaces in order to streamline the generation of a large and widely accessible perovskite libraries of unforeseen quality. After the perovskite deposition, a multi-step evaporation process was employed to assure reproducibility and uniformity of the devices. Finally, we fabricated 600 individual solar cells following the proposed recipes, and then proceeded with the data extraction through the automated electrical characterization (see Supporting Information for more details) whilst ensuring that the only possible difference in the results would originate from RPPs films.