Silicon Wafer Cutting: Difference between revisions
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Process of parallel wire cut with abrasive slurry of diamond or SiC grit [https://www.sciencedirect.com/topics/engineering/ingots] | Process of parallel wire cut with abrasive slurry of diamond or SiC grit [https://www.sciencedirect.com/topics/engineering/ingots] | ||
=Costs= | |||
#$15/kg for polysilicon [https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.nrel.gov/docs/fy19osti/72134.pdf&ved=2ahUKEwilkIGg3IT0AhUhnGoFHcA9DP4QFnoECAUQAQ&usg=AOvVaw1vWCZX5NpUAc8pJmI3K1th] | |||
##About 660 grams of silicon per panel [https://www.google.com/search?q=hiw+many+grams+of+silocon+in+a+pv+panel&oq=hiw+many+grams+of+silocon+in+a+pv+panel&aqs=chrome..69i57.16536j0j4&client=ms-android-verizon&sourceid=chrome-mobile&ie=UTF-8#scso=__g2QYcKsIaG5qtsPhPC5oAU32:0] | |||
#3.6 cent per watt silicon costs | |||
#2018 had 37 cent minimum sustainable selling price, and long term prediction is 24 cents (another 30 percent reduction. | |||
This puts PV at under $100 for a 380W panel, or about $2/lb. | |||
=Silicon Production= | |||
It is only 10 percent of panel cost, | |||
It is currently made with electrolysis of carbon + sand. [https://www.cleanenergyreviews.info/blog/solar-panel-components-construction]. No clear path is known for reduction of sand with hydrogen? | |||
99% pure silicon is refined further by reacting with hydrochloric acid to make nasty ass trichloroethane. Innovation would be required to make this happen without toxic silanes. [https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.microchemicals.com/technical_information/czochralski_floatzone_silicon_ingot_production.pdf&ved=2ahUKEwiq8py45YT0AhXimmoFHVaFBkoQFnoECBAQAQ&usg=AOvVaw2gey_gC16fis_mV7qtgdbP] | |||
Latest revision as of 19:18, 13 November 2021
Process of parallel wire cut with abrasive slurry of diamond or SiC grit [1]
Costs
- $15/kg for polysilicon [2]
- About 660 grams of silicon per panel [3]
- 3.6 cent per watt silicon costs
- 2018 had 37 cent minimum sustainable selling price, and long term prediction is 24 cents (another 30 percent reduction.
This puts PV at under $100 for a 380W panel, or about $2/lb.
Silicon Production
It is only 10 percent of panel cost,
It is currently made with electrolysis of carbon + sand. [4]. No clear path is known for reduction of sand with hydrogen?
99% pure silicon is refined further by reacting with hydrochloric acid to make nasty ass trichloroethane. Innovation would be required to make this happen without toxic silanes. [5]