Which Is Better Monocrystalline Or Polycrystalline Solar Panels?
If I were to recommend one from monocrystalline solar panels and polycrystalline solar panels, I would definitely recommend monocrystalline silicon solar panels. Here is an Itehil 100w 18v solar panel as an example. The monocrystalline solar panels used by Itehil 100w 18v solar panels have a higher photoelectric conversion rate than ordinary polycrystalline solar panels (the conversion rate of monocrystalline solar panels is 23%, and the conversion rate of polycrystalline solar panels is 17%-18%), strong stability, and the same The size is small and easy to carry under the wattage. If you want to know more, you need to see the detailed introduction of monocrystalline silicon and polycrystalline silicon below.
Monocrystalline silicon has two allotropes, crystalline and amorphous. Crystalline silicon is further divided into single crystal silicon and polycrystalline silicon. They both have a diamond lattice, the crystal is hard and brittle, has metallic luster, and can conduct electricity, but the conductivity is lower than that of metal, and it increases with temperature, and has semiconductor properties.
Monocrystalline silicon is an indispensable basic material in modern science and technology such as electronic computers and automatic control systems in daily life. TVs, computers, refrigerators, telephones, watches, cars, are inseparable from monocrystalline silicon materials. As one of the popular materials for scientific and technological applications, monocrystalline silicon has penetrated into every corner of people's lives.
Polycrystalline silicon is a form of elemental silicon (a collective term for monocrystalline silicon and polycrystalline silicon). When molten elemental silicon solidifies under supercooling conditions, silicon atoms are arranged in the form of a diamond lattice into many crystal nuclei. If these crystal nuclei grow into crystal grains with different crystal plane orientations, these crystal grains combine to crystallize into polysilicon . Polycrystalline silicon can be used as a raw material for pulling monocrystalline silicon. The difference between polycrystalline silicon and monocrystalline silicon is mainly manifested in physical properties. For example, in terms of mechanical properties, optical properties, and thermal properties, the anisotropy is far less obvious than that of single crystal silicon; in terms of electrical properties, the conductivity of polycrystalline silicon crystals is far less significant than that of single crystal silicon, or even almost no conductivity. In terms of chemical activity, the difference between the two is extremely small. Polycrystalline silicon and monocrystalline silicon can be distinguished from the appearance, but the real identification must be determined by analyzing the crystal plane direction, conductivity type and resistivity of the crystal.
Uses: It is a raw material for the manufacture of semiconductor silicon devices, used to make high-power rectifiers, high-power transistors, diodes, switching devices, etc.
(1)Monocrystalline silicon solar cell
At present, the photoelectric conversion efficiency of monocrystalline silicon solar cells is about 17%, and the highest is 24%. This is the highest photoelectric conversion efficiency of all types of solar cells at present, but the production cost is so large that it cannot be widely used. And used universally. Since monocrystalline silicon is generally encapsulated with tempered glass and waterproof resin, it is durable and has a service life of up to 25 years.
(2)Polycrystalline silicon solar cell
The manufacturing 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 has to be reduced a lot, and its photoelectric conversion efficiency is about 15%. In terms of production cost, it is cheaper than monocrystalline silicon solar cells, the materials are simple to manufacture, the power consumption is saved, and the total production cost is lower, so it has been developed in a large amount. In addition, the service life of polycrystalline silicon solar cells is shorter than that of monocrystalline silicon solar cells. In terms of cost performance, monocrystalline silicon solar cells are slightly better.
(3)Amorphous silicon solar cell (thin film solar cell)
Amorphous silicon solar cell is a new type of thin film solar cell that appeared in 1976. It is completely different from monocrystalline silicon and polycrystalline silicon solar cells. The process is greatly simplified, the silicon material consumption is low, and the power consumption is lower. The advantage is that it can generate electricity in low light conditions. However, the main problem of amorphous silicon solar cells is the low photoelectric conversion efficiency. The current international advanced level is about 10%, and it is not stable enough. As time goes by, its conversion efficiency decays.
In summary, the high conversion rate of 23%, the ETFE film from Japan, and the waterproof grade IPX4, etc., all show that ITETHIL 100W 18V solar panel has an advantage over most of the solar panels on the market. Go to have a look at ITETHIL stores now!