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Analysis On Several Materials for Solar Cells — Lifepo4 Battery For Ride-On Car

From:CTECHI GROUP Limited     Release time:2019-02-14

Overview:At present, solar cells are divided into several types according to the raw materials, structure and manufacturing methods used. Among them, crystalline silicon solar cells mostly refer to single crystal silicon solar cells and polycrystalline silicon solar cells using silicon semiconductor substrate as raw materials; in addition, there are amorphous silicon solar cells, which are based on the same thin film method as liquid crystal panels and are made by evaporating amorphous silicon on glass substrates instead of silicon substrates.

At present, solar cells are divided into several types according to the raw materials, structure and manufacturing methods used.


Among them, crystalline silicon solar cells mostly refer to single crystal silicon solar cells and polycrystalline silicon solar cells using silicon semiconductor substrate as raw materials; in addition, there are amorphous silicon solar cells, which are based on the same thin film method as liquid crystal panels and are made by evaporating amorphous silicon on glass substrates instead of silicon substrates.


Monocrystalline silicon solar cells form solar cells on monocrystalline silicon substrates, and there are products with conversion efficiency of up to 20%, which have excellent performance and reliability.


However, silicon substrates as raw materials are expensive, and the cost of generating electricity per watt is high. Polycrystalline silicon solar cells have the advantage of relatively low cost, although their conversion efficiency is lower than that of single crystal silicon solar cells.


The substrates used for single-crystal and polycrystalline silicon solar cells are mostly made by cutting thin sheets from silicon blocks (ingots) which are slowly cooled and crystallized after heating and liquefaction of silicon. Polycrystalline silicon solar cells are formed when polycrystalline silicon ingots are used, and single-crystal silicon solar cells are formed when single-crystal silicon ingots are used. Compared with polycrystalline silicon ingots, the production efficiency of single-crystal silicon ingots is lower, so the price of single-crystal silicon ingots is more expensive.

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The thinner the silicon substrate is cut, the more substrate blocks are obtained from the same ingot, and the lower the cost. However, thin slice cutting also has the disadvantage of easy rupture in the manufacturing process. Therefore, global material manufacturers have fierce competition on how to improve the yield and reduce the cost while cutting thin slices.


The amorphous silicon solar cells made by thin film method are different, the use of silicon is greatly reduced, and the vacuum evaporation process is suitable for mass production. Therefore, compared with crystalline solar cells, the conversion efficiency of amorphous silicon solar cells is lower, only about 10%. This kind of solar cells attracts much attention in the period of high price of silicon raw materials, but with the consumption of silicon materials. The tight market is weakening and its share growth is not as expected.


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