Graphite for Solar Cells in the Photovoltaic Industry

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For the production of multicrystalline and monocrystalline silicon, the most important raw material in the production of solar cells in the photovoltaic industry, we are developing essential components based on specialty graphite for the highly sensitive process of crystal growth.

These include heaters, crucibles and heat shields of high-purity fine grain graphite or carbon-fiber-reinforced carbon, as well as insulation components made of graphite felts.

We offer efficient solutions, starting with highly pure graphite electrodes for the deposition of highly pure polysilicon. We also supply finished articles like heaters, crucibles and insulation components for Czochralski pulling of monocrystalline silicon ingots. Our portfolio is completed by wafer carriers for PECVD units made of isostatic graphite or carbon-fiber reinforced composites with state-of-the-art designs.

Silicon-based solar cells promise to be a cornerstone for the power supply by sustainable energy sources. To cover the increasing demand, economy of scale counts. Thanks to the world's largest cold isostatic press with a diameter of 1800 mm, height of > 2000 mm and a maximum pressure of 2000 bar, we are able to press green carbon bodies in various geometries and grades.

This is just one of our smart solutions along the entire PV value chain from heat treatment to coating and purification of finished parts and a way to support the world with safe energy.

Most processes in the photovoltaic value chain operate at high temperature and in an extremely corrosive environment. At the same time, high purity and precision are required to produce solar silicon grades. Our materials are indispensable to fulfill the tight specifications of the photovoltaic industry.