Photovoltaics (PVs) deployment offers a viable pathway to fulfilling a substantial amount of the global energy demand. Perovskites are expected to reach commercial stage manufacture soon. Driven by lead-based perovskites, lab-scale power conversion efficiencies (PCEs) have reached 27%, surpassing the PCEs of conventional silicon-based PVs (20 – 24%). Yet, the total PVs material demands required to fulfil projected energy deployment remain unquantified. Herein, data from 5 perovskite PVs were collected, each of a unique architecture, and material demands were estimated based on PCEs and market share predictions, assuming a commercial module lifespan of 25 years. Perovskite PVs’ Market share was varied as a portion of a famous scenario that projects PVs deployment throughout the upcoming 25 years, namely the Teske 1.5oC scenario. Material demands differ depending on the architecture of each device. Results suggest that supply risks associated with tin, iodine, indium, and silver may delay commercial deployment of perovskite PVs. Iodine exhibits a higher supply risk than has been acknowledged in literature. Sensitivity analyses underscore that entering the commercial market at elevated PCEs can significantly maximise material savings. These insights can be used as a bassline for life cycle assessments, guiding the selection of optimal module architecture from both economic and environmental perspectives. This scientific manuscript was presented at the sessions of the International Renewable Energy, Gas, Oil and Climate Change Conference "iREGO" in the period of April 25-27, 2026. Tripoli - Libya............. Keywords:................ perovskites; power conversion efficiency; material demand sustainability; supply risk.