Epitaxial deposition produces acceptable solar cells from metallurgicalgrade silicon. Instead of diffusing dopants into silicon to form pn junction, junction is formed by growing epitaxial layer--one having crystal structure continuous with that of substrate--on metallurgical-grade silicon. Less pure forms of silicon, such as metallurgical-grade, are less expensive than semiconductor-grade material and help to lower cost of solar cells.
Solar Cells From Metallurgical-Grade Silicon
NASA Tech Briefs ; 6 , 4
01.12.1982
Sonstige
Keine Angabe
Englisch
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