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OCI is one of the world¡¯s Top 2 Polysilicon producers, supplying the ultra high purity Polysilicon for solar power generation and semiconductors.

Product Features




Polysilicon is the basic core material for solar Solar PV industry, positioned at the very first step of the PV value chain, consists of ingots, wafers, cells, modules and 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.

Solar PV Value Chain
polysilicon, waper, cell, module, solar power

OCI Status

Gunsan plant

Gunsan Plant

Malaysia plant

Malaysia Plant

OCI decided to intensively invest in and develop the key material for Solar PV. Polysilicon as the next-generation business as OCI considered that solar power was the fastest-growing business among alternative energies in 2006. OCI constructed the Gunsan Plant, with a capacity of 5,000t/yr. The second and third plants were added in 2009 and 2010, respectively. By increasing its production capacity by 10,000t/yr by debottlenecking (improving the production process) of the third plant in 2015 and acquiring Tokuyama¡¯s Malaysia polysilicon business in 2017, OCI has become the world¡¯s second-largest polysilicon producer with a total production capacity of 72,000t/yr.

Operation Start Year

June 28, 2006

Production Plant Status
OCI Plant in Gunsan, Jeollabuk-do / Samalaju, Malaysia

Business Commencement : June 28, 2006

Plant : Gunsan, Korea / Malaysia

  • - Gunsan: Capa 52,000t/yr
  • - Malaysia: Capa 20,000t/yr
  •   Total Annual Capacity : 72,000t/yr
Major Market

China, Taiwan, Europe, USA, Japan

Key Point

  • Global
    Top 2 Player

    Supplying high purity Polysilicon with the world¡¯s second largest production capacity

  • Top class in
    Cost Competiveness

    Securing the world¡¯s lowest OPEX (Operation Expenses) and CAPEX (Capital Expenditures) through a large-scale production and debottlenecking

  • High Purity of

    Providing high-purity Polysilicon of 10-Nine grade or higher by innovative production process and cutting edge technology


  • Product Name : Polysilicon
  • Chemical Formula : Si
  • CAS No. : 7440-21-3
  • Certification : ISO9001, Green Technology Certification
  • E-mail
    •, RES& (Purchase)
    • Polysilicon Sales : +82-2-727-9642
    • Polysilicon Business : +82-2-727-9258
    • Polysilicon raw material : +82-2-727-7903
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