Polysilicon is a good thing.
1. Monocrystalline Silicon Polycrystalline silicon is a raw material used to make solar panels.
2. Silicon is an extremely abundant element on earth. Silicon is present almost everywhere and is inexhaustible. There is no shortage of raw materials needed to use silicon to make solar cells.
3. The speed of polycrystalline silicon solar panels is generally two to three times that of monocrystalline silicon, and the voltage needs to be more stable.
4. The manufacturing process of polycrystalline silicon solar cells is similar to that of monocrystalline silicon solar cells. Its photoelectric conversion efficiency is about 12%, which is slightly lower than that of monocrystalline silicon solar cells. is easy to manufacture and saves energy. The overall costproduction is lower and is therefore highly developed.
The difference between solar polycrystalline silicon, monocrystalline silicon and amorphous silicon
1 Different forms
1. Crystalline silicon rods are cylindrical, and the solar cells produced by cutting them are also disks. The utilization rate of the flat surface of solar modules is low.
2. Polycrystalline Silicon: Polycrystalline silicon is a square substrate. Square materials can be obtained directly from polycrystalline silicon obtained by direct casting and solidification methods.
2. Different colors
1. Monocrystalline Silicon: The color of monocrystalline silicon is black. Compared with polycrystalline silicon and amorphous silicon solar cells, its photoelectric conversion efficiency is the highest.
2. Polycrystalline Silicon: The color of polycrystalline silicon est blue and the photoelectric conversion efficiency of solar cells is much lower. Its photoelectric conversion efficiency is about 17-18%.
3. Different sizes
1. Single crystal silicon: The size of single crystal silicon is smaller than that of single crystal silicon rods with purity up to 99.999%. , which also increases the cost, difficult to use on a large scale.
2. Polycrystalline Silicon: Polycrystalline silicon can be made larger than monocrystalline silicon. The production of polycrystalline silicon wafers consumes little energy and the production process is pollution-free. cells are more economical.
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Amorphous silicon and monocrystalline silicon difference between Polycrystalline Silicon:
1. Compositionstructural situation:
1. Monocrystalline silicon is a single crystal of silicon, a crystal with a fundamentally complete lattice structure. Different directions have different properties and are good semiconductor material.
2. Polycrystalline silicon is a form of elemental silicon. When molten elemental silicon solidifies under supercooled conditions, the silicon atoms are arranged in the shape of a diamond lattice to form numerous crystal nuclei. If these crystal nuclei transform into crystal grains with different crystal plane orientations, these crystal grains combine to form polycrystalline silicon. , it is a good semiconductor material. Polycrystalline silicon can be used as a raw material to extract monocrystalline silicon. The difference between polycrystalline silicon and monocrystalline silicon is mainly reflected in the propertiesphysical events. ?
3. Amorphous silicon is a semiconductor. It is a non-crystallized product during the silicon preparation process. There are many "dangling connections" within its structure, that is, there is no environment. silicon atoms bonding electrons, these electrons areThe current can be generated under the action of a field.
2. Physical properties:
In terms of mechanical properties, electrical properties, etc., the properties of amorphous silicon, polycrystalline silicon and monocrystalline silicon have in turn improved.
3. Application performance of photovoltaic cells: Under strong sunlight, crystalline solar panels can convert more than twice as much solar energy into electrical energy than amorphous solar panels, but crystalline solar panels price is more than two or three times more expensive than the amorphous type, and in cloudy weatherthem, the amorphous type can collect almost as much solar energy as the crystalline type.
Baidu Encyclopedia - Amorphous Silicon
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