monocrystalline silicon scrap

Monocrystalline silicon scrap is an industrial by-product. From monocrystalline silicon. It contents very high purity silicon, which can be used in silicon related industry. Polysilicon is a form of elemental silicon. When molten elemental silicon solidifies under supercooling conditions, silicon atoms are arranged in the form of a diamond lattice into many crystal nuclei. If these crystal nuclei grow into crystal grains with different crystal plane orientations, these crystal grains combine to crystallize into polysilicon . Utilization value: From the current international solar cell development process, it can be seen that its development trend is monocrystalline silicon, polycrystalline silicon, ribbon silicon, thin film materials, etc. In the polysilicon production process, some special circumstances will cause the product to fail to meet the standards and produce monocrystalline silicon scrap.

monocrystalline silicon scrap

Polycrystalline silicon is generally prepared by directional solidification, using square crucibles, which has high production efficiency and high material utilization. The disadvantage is that the produced silicon crystals contain a large number of defects such as grain boundaries and dislocations, which results in the silicon cells prepared by them with significantly lower photocrystalline conversion efficiency than single crystal silicon cells. The main raw material of solar cells is silicon crystal, including monocrystalline silicon and polycrystalline silicon. Monocrystalline silicon is mainly prepared by the Czochralski method, which is characterized by complete crystal structure, low crystal defects, and high photoelectric conversion efficiency of the prepared silicon cell. However, the cost of silicon cells prepared by this method is relatively high, and the production efficiency is low. Due to the characteristics of its production technology, the monocrystalline silicon ingot produced by the Czochralski method is cylindrical, and the material utilization rate is low in the process of cutting into square cells. Monocrystalline silicon scrap is a kind of waste caused by production errors. Using the casting method to produce monocrystalline silicon cells is an effective way to solve the contradiction between the cost and conversion efficiency of silicon cells. Since the density of solid silicon is lower than that of liquid silicon, the solid silicon placed at the bottom of the crucible may float up after being wetted by contact with liquid silicon, resulting in failure to induce crystal growth.

Monocrystalline silicon scrap is a kind of silicon scrap, also can be called as silicon slag, but it is far better than regular silicon slag. Cause the silicon content is very high, usually, the Si is above 99.9%, which is even better than common metallurgy grade or chemical grade silicon. So monocrystalline silicon scrap is qualified to be a replacement of those regular silicon models.