This lecture covers the fundamentals and processes for photovoltaic devices, including the general process from sand to modules, impurities in polysilicon, ingot growth methods, wire sawing, impact of cracks on wafer strength, energy considerations, industry trends, standard cell processing, etching, p-n junction diffusion, antireflection coating, screen printing, firing, contact formation, measuring/sorting, and the evolution towards PERC, PERL, and PERT cell structures.