Solar panels are divided into single crystal solar panels, polycrystalline solar panels and amorphous silicon solar panels, and most solar panels are mainly made of single crystal and polycrystalline materials. So is it better to have a single crystal solar panel or a multi-crystal solar panel?
Polycrystalline and monocrystalline silicon are two different materials, polycrystalline silicon is a chemical proper nouns commonly known as glass, high purity polycrystalline silicon material is high purity glass, make solar photovoltaic cells monocrystalline silicon is raw material, is also making the material of semiconductor chips, because in the production of monocrystalline silicon mineral raw material scarce and complex production process, so the low production and expensive.
One, the distinction between single crystal plate material and polycrystal plate material
In simple terms, the difference between monocrystalline silicon and polycrystalline silicon their atomic structure arrangement, single crystal is orderly arrangement, polycrystalline is disordered arrangement, this is mainly decided by their processing technology, polycrystalline casting method is used to produce more, is the silicon material in crucible melting directly to finalize the design, and single crystal is adopted Siemens modified czochralski method, The direct drawing process is a recombination of atomic structure. To our naked eye, monocrystalline silicon looks the same on the surface, polysilicon looks like it has a lot of broken glass in it and it's shiny.
1, single crystal solar panel: no pattern, dark blue, close to black after packaging.
2, polycrystalline solar panel: pattern, polycrystalline colorful and polycrystalline less color, like the snow crystal pattern on the snow iron sheet, light blue.
3, amorphous solar panels: most are glass, brown and tan.
Two, the characteristics of single crystal solar panel and polycrystal solar panel
1. Characteristics of monocrystalline silicon solar cells
Monocrystalline silicon solar cell is a kind of rapidly developed solar cell. Its composition and production technology have been finalized, and the products have been widely used in space and ground facilities. The solar cells are made of high purity monocrystalline silicon rods with a purity of 99.999%. The photoelectric conversion efficiency of monocrystalline silicon solar cells is about 15%, and the highest reaches 24%, which is the highest among the current types of solar cells. However, the production cost is so high that it cannot be widely and widely used. Because monocrystalline silicon is generally sealed with toughened glass and waterproof resin, it is strong and durable, with a service life of up to 15 years and up to 25 years.
2. Characteristics of polysilicon solar cells
The production process of polycrystalline silicon solar cells is similar to that of monocrystalline silicon solar cells, but the photoelectric conversion efficiency of polycrystalline silicon solar cells is much lower, and its photoelectric conversion efficiency is about 12%. In terms of production cost, compared with monocrystalline silicon solar cells, the material is simple to manufacture, saves power consumption, and the total production cost is low, so it has been developed in large quantities. In addition, the service life of polysilicon solar cells is shorter than that of monocrystalline solar cells. In terms of performance-price ratio, monocrystalline silicon solar cells are slightly better.
After reading the introduction, we think the solar panel is a good single crystal or a good multi-crystal? In general, solar panels on the market now or the use of single crystal more, the basic technology is mature, the market is large, maintenance is much more convenient.