This study[0] estimated that less than a microgram of dopant is needed per m^2 and that producing 5 MW of solar cells requires 1 gram of phosphorous. [0]https:/

This study[0] estimated that less than a microgram of dopant is needed per m^2 and that producing 5 MW of solar cells requires 1 gram of phosphorous. [0]https://ascelibrary.org/doi/abs/10.1061/(ASCE)0893-1321(2001)14:2(77) https://ascelibrary.org/doi/abs/10.1061/(ASCE)0893-1321(2001...