The Global Solar Photovoltaic Supply Chain and Bottom-UP Cost Model Results

Process Flow for Polysilicon Production Metallurgical Grade (MG) Silicon Si 98-99% Purity (98% to 2N) Production and distillation of trichlorosilane, SiHCI 3 Source: Alibaba Polysilicon Si 99.99999-99.999999999% (7-11 N) purity for Solar 11-12 N purity for Semiconductor Source: Hemlock Semiconductor Hydrochloric Acid HCI Harvesting, breaking, washing/etching, and packaging. Source: Daqo Siemens Chemical Vapor Deposition (CVD) 诚信敬业创新聞部閉 Source: Daqo Source of figure: NREL. https://www.energy.gov/policy/securing-americas-clean-energy-supply-chain Rod Bell Jar Source: GCL Poly

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