What is polysilicon? What is polysilicon?

Polysilicon is a semiconductor material that is made up of multiple small crystals spliced together. It is one of the main materials for solar panels and is also widely used in semiconductor manufacturing as well as electronic devices. Compared to monocrystalline silicon, polysilicon is a simpler and less expensive production process, but its quality and performance are also relatively low.

Polysilicon is widely used in the field of solar cells because it can directly convert sunlight into electrical energy, which has the advantages of high efficiency, reliability, and environmental protection.

Polysilicon refers to:

Polysilicon is a form of elemental silicon. When molten elemental silicon solidifies under supercooling conditions, the silicon atoms are arranged into many crystal nuclei in the form of a diamond lattice, and if these crystal nuclei grow into grains with different crystal plane orientations, these grains combine to crystallize into polysilicon.

Polysilicon has a gray metallic luster, density. Melting point 1410. Boiling point 2355. Soluble in mixed acids of hydrofluoric acid and nitric acid, insoluble in water, nitric acid and hydrochloric acid. The hardness is between germanium and quartz, brittle at room temperature, and easy to crumble when cut.

Uses of polysilicon:

Polysilicon can be used as a raw material for drawing monocrystalline silicon, and the difference between polysilicon and singular crystalline silicon mainly shows Li Bi's physical properties. For example, in terms of anisotropy in mechanical, optical and thermal properties, it is far less pronounced than monocrystalline silicon.

In terms of electrical properties, the conductivity of polycrystalline silicon crystals is also much less significant than that of monocrystalline silicon, or even almost no conductivity. In terms of chemical activity, the difference between the two is minimal.

Polycrystalline silicon and monocrystalline silicon can be distinguished by appearance, but the real identification must be determined by analysis to determine the crystal plane orientation, conductivity type, and resistivity. Polysilicon is a direct raw material for the production of monocrystalline silicon, and is the basic material for electronic information of semiconductor devices such as contemporary artificial intelligence, automatic control, information processing, and photoelectric conversion.

Polysilicon is a silicon material whose crystal structure consists of multiple crystal particles that are not perfectly aligned. Unlike monocrystalline silicon, polycrystalline silicon has defects in the crystal structure such as grain boundaries and grain boundaries, which lead to relatively poor electrical and optical properties. However, polysilicon antecedents still have some use in some applications.

Polysilicon is less expensive to prepare than monocrystalline silicon because it is relatively simple to prepare and does not require a continuous lattice structure like monocrystalline silicon. It is usually used in some applications that require relatively low electrical performance, such as solar panels, building materials, etc.