Lead halide perovskite solar cells (PSCs) have achieved remarkable laboratory efficiencies, yet their industrial translation remains restricted by limited understanding of the composition–processing–performance relationship. Here, we present a large‐scale meta‐analysis of ∼38,000 APbX 3 devices, classified into MAPbI 3 , FAPbI 3 , alternative‐cation APbI 3 , and multicomponent APbX 3 , to identify common processing trends and critical determinants of performance. We first trace the temporal evolution of Pb‐halide PSCs, consolidating key milestones into a unified and accessible framework. Energy‐loss analysis highlights Pb–iodide perovskites as distinct within the halide family, exhibiting the lowest V oc losses and underscoring the need to replicate their favourable electronic structure with environmentally benign alternatives. Device‐level analysis shows that high‐efficiency outcomes are more frequently realized in n–i–p configurations, particularly for compositions requiring moderately high annealing temperatures, whereas achieving similar gains in p–i–n devices demands thermally robust hole‐transporting layers. A comprehensive evaluation of deposition methods, solvent systems, additives, quenching strategies, annealing protocols, and processing environments identifies solvent coordination chemistry and thermal treatment as the most influential parameters governing device performance. Collectively, these findings establish a statistically robust framework for rational perovskite design, emphasizing scalable high‐crystallinity film growth, composition‐specific engineering, and stable interfacial designs as enablers of industrial deployment.
M et al. (Wed,) studied this question.