Production of Upgraded Metallurgical Grade (UMG) silicon for a low-cost high-efficiency and reliable PV technology
This paper summarizes the comprehensive development of Ferrosolar's upgraded metallurgical grade (UMG) silicon technology, demonstrating that through optimized purification, doping, and defect engineering, UMG-Si can produce high-efficiency, reliable, and environmentally superior solar cells and modules that are competitive with conventional polysilicon.