Kraiem is also convinced of the strong potential of HPQ Silicon’s PUREVAP technology for the production of polysilicon....
....that it also achieved a maximum conversion efficiency of 21.1% on N-type wafers, by teaming up with the Australian National University. “Furthermore, without betraying any secret, we can already say that this record should be largely beaten in the coming months,” he also affirmed.
https://www.pv-magazine.com/2019/04/05/demand-for-polysilicon-is-not-going-away/