polysilicon is a form of elemental silicon, which is a semiconductor material composed of multiple small crystals spliced together.
When polysilicon solidifies under supercooling conditions, silicon atoms arrange in a diamond lattice form into many crystal nuclei. If these nuclei grow into grains with different crystal orientations, these grains combine to crystallize into polysilicon. polysilicon is the direct raw material for producing monocrystalline silicon and serves as the electronic information foundation material for contemporary semiconductor devices such as artificial intelligence, automatic control, information processing, and photoelectric conversion. The preparation method of polysilicon is generally by placing the silicon melt in a quartz crucible and then slowly cooling it to form multiple small crystals during the solidification process. Usually, the size of polysilicon crystals prepared is smaller than that of monocrystalline silicon, so their electrical and optical properties will be slightly different. Compared with monocrystalline silicon, polysilicon has lower production costs and higher photoelectric conversion efficiency, making it widely used in the production of solar panels. In addition, polysilicon can also be used in the manufacturing of semiconductor devices and integrated circuits.
| Grade | Si:Min | Fe:Max | Al:Max | Ca:Max |
| 3303 | 99% | 0.3% | 0.3% | 0.03% |
| 2202 | 99% | 0.2% | 0.2% | 0.02% |
| 1101 | 99% | 0.1% | 0.1% | 0.01% |
Post time: Sep-18-2024
