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Solar silicon via the Dow Corning process (1979)

Hunt, L. P. ; Dosaj, V. D.

In: CASI

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Publication Date: 2019-06-28

Description: Technical feasibility for high volume production of solar cell-grade silicon is investigated. The process consists of producing silicon from pure raw materials via the carbothermic reduction of quartz. This silicon was then purified to solar grade by impurity segregation during Czochralski crystal growth. Commercially available raw materials were used to produce 100 kg quantities of silicon during 60 hour periods in a direct arc reactor. This silicon produced single crystalline ingot, during a second Czochralski pull, that was fabricated into solar cells having efficiencies ranging from 8.2 percent to greater than 14 percent. An energy analysis of the entire process indicated a 5 month payback time.

Keywords: ENERGY PRODUCTION AND CONVERSION

Type: NASA-CR-163798 , DOE/JPL-954559-78/7 , JPL-9950-452

Format: application/pdf

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