RSi

A ground-breaking technology that delivers a low-cost, sustainable, green method for producing solar grade silicon that will aid in the pursuit of affordable of solar cells, greatly reducing the their energy payback and carbon footprint.

Solar Grade Purity

• The ChemArc process produces 6-7N pure silicon that will be 7N+ following the directional solidification process performed by the wafer manufacturer
  
• All feedstock is pre-purified to 6N+ prior to entering the arc furnace for reduction
• Wet chemical technical target “the right” impurities to allow directional solidification to act as an additional purification step

Low-Cost

• Arc furnace technology is the least expensive method to produce silicon metal
• From plant gate to tap hole, the ChemArc process will produce the lowest cost per kilogram solar grade silicon in the market
• Using simple and easily scalable equipment and techniques allows for minimal capital expenditure for the construction of a ChemArc manufacturing site, leading to a significant reduction in depreciation costs

Reduced Energy Consumption

• ChemArc silicon is made using less than 25 kWh/kg, allowing for a significant reduction in the energy payback of solar cells

Environmentally Clean and Sustainable

• Water glass, from sand and soda ash, and sugar are safe, readily available feedstock
• Carbon dioxide is the only emission, and with sugar being the carbon source, the process is renewable and almost completely carbon neutral
  

process overview

The ChemArc process starts with safe, available and environmentally friendly feedstocks, and applies standard wet chemical and metallurgical techniques that are easily scalable and widely used to produce materials with sub 1 part-per-million impurities.

Combining carbon from sugar with silica from sand results in a very green process without environmental concerns.