Crystallisation of solar silicon
Solar wafer production of SolarWorld AG
Learn about how our Freiberg facility produces wafers from silicon in the video.
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SolarWorld Industries Sachsen GmbH
The main product for solar cells
In the second step solar wafers are produced. They are the main product for solar cells. The SolarWorld subsidiary, SolarWorld Industries Sachsen GmbH, produces solar wafers in Freiberg. This facility is one of the world's largest producers of polycrystalline solar silicon wafers. The Solsix brand wafers produced in Freiberg are not only processed to make solar cells by companies in the SolarWorld Group, many third-party solar cell manufacturers worldwide also use them.
The high-purity silicon is cast into a coated mould of high-purity quartz material and melted at temperatures over 1,400 degrees Celsius. Just one single crystal is extracted from the melted silicon mass during the production of monocrystalline wafers. When producing of polycrystalline wafers, the liquid silicon mass hardens and thousands of small crystals combine to form a block. In the next phase of the production process, these blocks are cut into square columns.