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Based in Russia, Valen-Si-A has introduced a groundbreaking approach to solar-grade polysilicon production known as the UM-technology. This innovation is expected to significantly impact the efficiency and quality of silicon manufacturing in the renewable energy sector.
The new method utilizes filaments to create a range of crystal structures during the gas-phase deposition of intermediate silicon. These filaments can be produced at a speed of 40 to 45 millimeters per minute, which helps reduce the amount of polysilicon required—down to just 1.2 kilograms per kilogram of filament produced.
In the process, a polysilicon rod with a diameter between 50 and 80 millimeters is mounted on a wire rope and then moved into an inductor. There, it is heated until it melts, and the molten silicon is transferred to a receiving chamber where crystallization takes place. However, this traditional method often faces challenges such as metal contamination, which can affect the final product's purity.
According to Valen-Si-A, their UM-technology addresses these issues by offering better protection against metal contamination, thereby enhancing the overall purity of the produced polysilicon. This advancement could lead to higher-quality solar panels and more efficient energy generation, making it a promising development for the global solar industry.
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