Revision as of 23:23, 12 February 2018

How They are Made

Phosphine - [1] - dopant. 40 l cylinder - $700 - [2]. 0.2 ppm is required for doping PV. [3]

If a PV panel, 285W, weighs 19 kg and maybe 1.5 kg silicon - [4] - then .2 ppm -> then 0.3 mg of phosphine per panel. If a bottle of phosphine contains 10 kg phosphine, then one bottle is sufficient for - 30,000,000 panels! Thus, phosphine costs per panel are negligible - 0.002 cent per panel. This may be reduced for inefficiency of diffusion - but still likely to be way under 1 cent per panel.

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 =Phosphorus=
 *Phosphine - [https://en.wikipedia.org/wiki/Phosphine#Preparation_and_occurrence] - dopant. 40 l cylinder - $700 - [https://www.alibaba.com/product-detail/Alibaba-Wholesale-price-7803-51-2_60704351130.html?spm=a2700.7724838.2017115.98.65c9275dvJn2iS]. 0.2 ppm is required for doping PV. [https://www.google.com/search?q=concentration+of+boron+dopant+in+pv&oq=concentration+of+boron+dopant+in+pv&aqs=chrome..69i57.7588j0j7&client=ubuntu&sourceid=chrome&ie=UTF-8]
+:*If a PV panel, 285W, weighs 19 kg and maybe 1.5 kg silicon - [https://sustainability.stackexchange.com/questions/5226/what-is-the-amount-of-silicon-in-a-1kw-panel] - then .2 ppm -> then 0.3 mg of phosphine per panel. If a bottle of phosphine contains 10 kg phosphine, then one bottle is sufficient for - 30,000,000 panels! Thus, phosphine costs per panel are negligible - 0.002 cent per panel. This may be reduced for inefficiency of diffusion - but still likely to be way under 1 cent per panel.
 *$5/lb - [https://www.alibaba.com/product-detail/HOT-selling-coated-red-phosphorus-power_60647447315.html?spm=a2700.7724857/A.main07.7.145f57e1N0qW4K&s=p]