OCI - Polysilicon

Usage

Polysilicon is the basic core material for Solar PV industry, positioned at the very first step of the PV value chain(ingots → wafers → cells → modules → solar power generation systems). OCI provides 10-Nine (99.99999999% purity) Polysilicon for solar power generation and 11-Nine (99.999999999% purity) for semiconductor wafers.

Production Process

Metal Silicon(MG-Si) is produced by reducing and melting Quartz. Metal silicon is then mixed with hydrogen and hydrochloric acid to produce high-purity trichloride silane (TCS). Then it undergoes chemical evaporation at high temperatures to produce high-purity solid Polysilicon.