ROSI SAS products

The base material used in the production of PV modules is photovoltaic-grade silicon (PV-Si). This material suffers a major lost of value during one of the first steps of the manufacturing process. Indeed, the silicon wafers that are the basis of photovoltaic cells are produced by sawing a silicon ingot into very thin slices (less than 200?µm thick) with the help of a diamond wire. During this process, more than 40% of the material is lost as micro-chips of silicon flushed by a sawing liquid. The sludge created this way is called “kerf” and is composed of ultra-pure silicon. Unfortunately, it is currently considered as waste and is discharged at the manufacturer’s expense.