Polysiliziums

Polysilizium, also known as polycrystalline silicon or polysilicon, is a high-purity form of silicon composed of many small silicon crystals, or grains. It is distinct from monocrystalline silicon, which consists of a single, continuous crystal lattice, and amorphous silicon, which lacks a crystalline structure. Polysilicon is produced through a highly energy-intensive process, typically involving the decomposition of silane gas (SiH4) or trichlorosilane (SiHCl3) at high temperatures.

The primary application of polysilicon is in the manufacturing of solar cells. Its polycrystalline structure, while less efficient at converting sunlight into electricity than monocrystalline silicon, is significantly cheaper to produce. This cost-effectiveness makes it the dominant material for the vast majority of photovoltaic modules manufactured globally. Polysilicon is also a crucial raw material for the semiconductor industry, although typically for less demanding applications or specific components compared to the ultra-high purity monocrystalline silicon used for integrated circuits.

The production of polysilicon involves stringent purification processes to remove impurities that can degrade its electrical properties. These impurities can include other elements like boron, phosphorus, and metals. The quality of polysilicon is often categorized by its purity level, with higher purity grades commanding higher prices. The global polysilicon market is a significant industry, driven by the demand for renewable energy and the continuous growth of the electronics sector.