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Directory:RSI Silicon

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&lt&lt A Congress:Top 100 Technologies -- RD Energy Technology &gt&gt

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RSI Silicon has developed a proprietary process to manufacture solar grade silicon with a purity of 99.9999+% (6N’s). The manufacturing processes have been commercially in use for over fifty years.

Its founders recognized that the processing of solar grade energy was too expensive and dependent on the Siemens Process Methodology. RSI has rewritten the way to make solar grade silicon using proven processes from other industries. This new innovative methodology will assist many countries achieve their renewable energy goals by making Solar Energy a viable proposition for energy producers.

Official Website

Product Info

Latest Developments

Dr. Steve Amendola, along with his experienced team, has commenced building the first plant. It is envisaged that production at the 1,000 metric tonne per annum plant based in Northampton County, Pennsylvania, will commence Q3 2008.

RSI anticipates completing a new plant in 2009 that will have a production capacity of 30,000 metric tonnes per annum, consisting of 6 new 5,000 tonne furnaces.

How it Works

RSI will be manufacturing solar grade silicon with a purity of 99.9999+% (6N’s). Most Plants are currently producing purity levels of 99.9999+% (8N’s) to use for the semiconductor industry as well as the solar industry. Our plant is producing solar grade silicon only.

RSI’s technology addresses the high cost of purification in a commercially viable chemical purification process, before silicon is produced. Using mature technology from other industries, impurities detrimental to the production of photovoltaic cells are removed from inexpensive commodity feed stocks. The feed stocks are fed into a dedicated, high-purity silicon production furnace and should result in silicon of sufficient purity (6N+) to meet the needs of photovoltaic cell manufacturers.


RSI Silicon Information Overview - James Dunn, V.P. Of Operations and Business Development for RSI Silicon gives an overview. (Solar Power Authority Feb. 3, 2008)


(5.40 Minutes) Silicon News

News broadcast of silicon company, although the fellow toots his horn for the first few minutes, he describes CitizenRe towards the last... (YouTube July 06, 2007)

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RSI Silicon wins Ignite Clean Energy award - (AOL Video June 5, 2007)

RSI Silicon, Inc. - Developing a unique ultra low-cost process for making solar-grade silicon for solar cells. (BrightCove June 1, 2007)


Provides solar grade Silicon at 33% of the product cost.


Solar grade silicon for less cost.






A method for preparation of high purity silicon suitable for photovoltaic cells using reduction of silica, which is pre-purified in an aqueous solution, in presence of a reducing agent, preferably carbonaceous agent, where the pre-purified silica has a low amount of boron suitable for photovoltaic cells is described.

RSI Silicon’s production process for solar grade silicon can be outlined in simplified form as follows. I’ve left out the addition of sulfuric acid to adjust pH, details about the steps, and optional steps for clarity.

Sodium silicate (Na2SiO3) is dissolved in deionized water to create an aqueous solution for chemical processing into high purity silica (SiO2).

The solution is filtered to remove insoluble materials including most of the phosphorus by first adding calcium or magnesium to the solution.

Boron is removed using a chelating agent such as AMBERLITE IRA734, an ion exchange resin. RSI Silicon’s tests and projections indicate Boron levels of 0.1ppm or lower after this step.

After being allowed to stand, a pure silica gel precipitates and is filtered and dried at up to 1400 °C (degrees Celsius). The silica is crystallized into briquette form.

In the final step, the same Carbothermic Reduction process, used to produce metallurgical silicon in a submerged arc furnace and described in Solar Grade Silicon roads lead to Ruše - Part 2, separates the oxygen from the pure silica (SiO2) to yield the Solar Grade Silicon.


Company: Reaction Sciences, Inc

Management Team


David Gelbaum, Trustee of Quercus Trust has provided the initial funding for the Company. Quercus has given more money to conservation causes in California than anyone else helping to protect 1,179 square miles of Desert and Mountain Lanscapes as well as donating $100 million to the Sierra Club. RSI's ability to produce cost effective solar grade silicon and assist the PV industry in becoming an economical energy alternative is the primary reason for David's investment and support.

Inventor: Steve Amendola

Dr. Steve Amendola developed the technology to use readily available inexpensive raw materials and off-the-shelf equipment. Combined with current Market Conditions, it is now commercially viable to use this technology to build solar grade silicon and ultimately build a global company that help address Environmental Concerns.


In the News

Image:RSI Silicon simple process equipment 95x95.jpg
Directory:Solar > Directory:Silicon >RSI's Solar Silicon Solution Wins MIT Energy Plan Contest - RSI Silicon debuts a far more inexpensive method of producing solar grade Silicon, winning "People's Choice" award and first place in the Energy Business Plan contest held by MIT. (NEC Specialist: Directory:James Dunn)


See Talk:Directory:RSI Silicon



RSI Silicon Products LLC :

3700 Glover Road

Easton, PA 18040 USA

Phone: 610 258 7777

Fax: 610 258 7099

Contact Form

See also


Directory:Solar - index of resources

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PowerPedia:Solar Energy - Encyclopedic review of history and future

Directory:Solar Energy Research and Development


Directory:Solar Problems


Directory:Concentrated Solar Power

Directory:Solar Infrared Harvesting

Directory:Solar PhotoVoltaics

Directory:Home Generation:Solar PV

Directory:Photovoltaic Research and Development

Directory:Solar Thermal

Directory:Home Generation:Solar Heating

Directory:Thin Film Solar

Directory:Solar:Photosynthesis Imitation

Directory:Solar Paint

Directory:Dye Solar Cells

Directory:Solar Tower

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Directory:Plastic Solar Cells

Directory:Silicon - more efficient uses, alternatives, methods

Directory:Black Silicon

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Directory:Solar:Installation and Consultation



Directory:Solar Applications



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Directory:Solar Pavement - black-body absorption of the asphalt

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