polysilicon for electronics(electronic grade polysilicon or semiconductor grade polysilicon) must have higher purity, as 99.9999999 percent and 99.999999999 percent (9N to 11N) commonly.
The global average price of Polysilicon for Electronics went down in 2012-2017, from about 37.9 $/kg in 2013 to 34.8 $/kg in 2017.
