Solar-grade high-purity polysilicon uses metallurgical-grade silicon as raw material, and the purity after purification reaches above 99.9999%, which is used in the photovoltaic industry; if you cannot specify the preparation process of high-purity polysilicon, you can use this dataset; this dataset is a weighted average of the datasets of “High-purity polysilicon, improved Siemens method, solar-grade” and “High-purity polysilicon, silane fluidized bed method, solar-grade”. Specific technical details, boundary scopes, and other information can be found in the production datasets for each high-purity polysilicon process.