Low cost solar grade silicon by recycling cast ingot rejects

There is a measure of agreement that Solar Grade Silicon (SGS) with a purity of 99.9999% [6N] can be manufactured using low cost processes and used to make commercially valuable solar cells, thus helping to achieve Grid Parity using crystalline silicon technology. A preferred approach is the use of Metallurgical Grade Silicon (MGSi) as raw material for SGS. In this work, we describe the potential for using silicon obtained by recycling a variety of silicon rejects from various Photovoltaic and Semiconductor manufacturing operations.