Development of Solar Grade (SoG) Silicon

Award Information
Agency: Department of Energy
Branch: N/A
Contract: DE-FG02-04ER83928
Agency Tracking Number: 76307S04-I
Amount: $99,928.00
Phase: Phase I
Program: SBIR
Awards Year: 2004
Solicitation Year: 2004
Solicitation Topic Code: 39
Solicitation Number: DOE/SC-0075
Small Business Information
27 Congress Street, Salem, MA, 01970
HUBZone Owned: Y
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 David Joyce
 (978) 745-0088
Business Contact
 Chandra Khattak
Title: Dr.
Phone: (978) 745-0088
Research Institution
76307-The continued rapid growth of the photovoltaic (PV) industry (43.5% growth in 2002) is limited by the availability of low-cost solar-grade (SoG) silicon feedstock in large quantities. It is estimated that current sources of SoG silicon (scraps and surplus capacity from the semiconductor industry) will not meet the demand by 2005. This project will develop low-cost technology for SoG silicon production by upgrading metallurgical-grade (MG) silicon, which is commercially produced in large quantities worldwide. Additives to the MG silicon will remove B, P, and Al impurities, and other impurities will be removed by directional solidification. The technology will be integrated with MG silicon production for commercialization. In Phase I, additions will be made to the low-purity MG silicon, which will be melted and directionally solidified. The additives will form compounds with high segregation coefficient impurities, which will be separated, volatilized, or segregated, leaving behind the higher purity silicon that can be used as SoG silicon feedstock. Commercial Applications and Other Benefits as described by the awardee: The technology should provide SoG silicon for the PV community, thereby addressing the shortage that is expected by 2005. This feedstock could also be used for some devices in the semiconductor industry.

* Information listed above is at the time of submission. *

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