Process for making low-cost silicon for solar cells is further improved. Silane product recycled to feed stripper column converts some of heavy impurities to volatile ones that pass off at top of column with light wastes. Impurities--chlorides of arsenic, phosphorus, and boron-would otherwise be carried to subsequent distillations where they would be difficult to remove. Since only a small amount of silane is recycled, silicon production efficiency remains high.
Removing Chlorides From Metallurgical-Grade Silicon
NASA Tech Briefs ; 6 , 4
1982-12-01
Sonstige
Keine Angabe
Englisch
Upgrading Metallurgical-Grade Silicon
NTRS | 1985
|Solar Cells From Metallurgical-Grade Silicon
NTRS | 1982
|Research - Purification of Metallurgical-Grade Silicon up to Solar Grade
Online Contents | 2001
|Purification of metallurgical silicon up to solar grade
Online Contents | 1994
|Refining of metallurgical-grade silicon by inductive plasma
Online Contents | 2002
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