Monocrystalline Silicon refers to any substance made from some arrangement of silicon elements. Once the molten, elemental silicon has solidified, silicon atoms can be arranged in many crystal nuclei to form a diamond lattice. These nuclei can grow into grains of the same plan direction and form monocrystalline silicon.
Monocrystalline silicon properties
Monocrystalline silicon exhibits quasi-metallic properties and low conductivity. Additionally, its conductivity rises with temperature and it has considerable semi-conductivity. Intinctual semiconductors are ultra-pure monocrystalline silicone. To ultra-pure monocrystalline silica, trace III An elements like boron can be added to increase conductivity. Likewise, adding trace V An elements (such as phosphorus and arsenic) can enhance the conductivity and create N-type silicon transistors.
How does monocrystalline silicon differ from polycrystalline?
Once the molten elemental silica solidifies, silicon atoms form into many nuclei. Monocrystalline silicon forms if the nuclei are formed into grains that have the same plane. Polysilicon, however, is formed if the nuclei become grains with different planes. There is little difference in the physical properties of polysilicon and monocrystalline silica.
The raw material to make monocrystalline silicon is polysilicon. Polysilicon also serves as the basis for photovoltaic energy generation and solar cells. Monocrystalline silicon may be considered to the most pure substance on the planet. For general semiconductor devices, silicon purity must exceed 6N. For large-scale integrated systems, the requirements are more stringent and silicon purity must be at least 9N. At the moment, monocrystalline silicon of purity 12N is being produced.
Why is monocrystalline silica used in
It is used mainly in solar cells. It is the first application of silicon solar cell. This has high conversion rates and mature technology. Silicon solar cells is used most often in light-intensive areas like aerospace. Numerous scientific research institutes and manufacturers of monocrystalline silicon batteries have created high-efficiency monocrystalline silicon batteries by using different battery processing technologies and wafer treatment.
How can you create monocrystalline silicon.
Preparation of monocrystalline silicon requires the realization of the transition from polycrystals to single crystals. That is, the atoms of single crystal are transformed directly from random arrangement to order array of liquid phase and from an asymmetric structure into a symmetrical. This is not a complete transformation, but it is achieved gradually through movement at the solid-liquid interface. To realize this transformation, polysilicon needs to undergo transformation from solid to molten and finally to solid crystal silica. It is possible to make monocrystalline silicon out of molten silica. The crucible Czochralski technique and the noncrucible suspension area melting method are currently the most popular. They are called CZ and FZ respectively.
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