Home > Knowledge > Content
The difference between single crystal silicon, polycrystalline silicon and amorphous silicon battery
- Jul 02, 2018 -

Photovoltaic power generation is mainly relying on batteries to attract solar energy into electricity. Before installing photovoltaic power plants, it is necessary to have a clear understanding of the batteries, so as to better select photovoltaic products. At present, solar cells on the market mainly include monocrystalline silicon, polysilicon, and amorphous silicon. What are the characteristics, advantages, and disadvantages of these three types of batteries?

1 Difference in appearance

From the appearance of the above, the four corners of the single crystal silicon battery are arc-shaped, the surface has no pattern; and the four corners of the polycrystalline silicon battery have a square angle, the surface has a pattern similar to ice; and the amorphous silicon battery is our usual The thin film component, which is not like a crystalline silicon cell, can be seen as a grid line, and the surface is as clear and smooth as a mirror.

Monocrystalline silicon battery.jpg

▲ Monocrystalline silicon battery

 Polysilicon battery.jpg

▲Polysilicon battery

 Thin film components.jpg

▲ Thin film components

2 Use the above difference

For users, single-crystal silicon cells and polycrystalline silicon batteries are not much different. Their life and stability are very good. Although the average conversion efficiency of monocrystalline silicon cells is about 1% higher than that of polysilicon, single-crystal silicon cells can only be made into quasi-squares (circular arcs on all four sides). Therefore, when solar cells are assembled, there will be a part of the area. Filled with dissatisfaction; and polysilicon is square, so there is no such problem, their advantages and disadvantages are as follows:

Crystal silicon components:

The monolithic component is relatively high in power. Under the same footprint, the installed capacity is higher than the film assembly. However, the components are heavy and brittle, the high temperature performance is poor, the poor light performance is poor, and the annual attenuation rate is high.

Film assembly:

Monolithic components are relatively low power. However, the power generation performance is high, the high temperature performance is good, the weak light performance is good, the shading power loss is small, and the annual decay rate is low. A wide range of applications, beautiful and environmentally friendly.

3 Manufacturing process

The energy consumed in the manufacturing process of polycrystalline silicon solar cells is about 30% less than that of monocrystalline silicon solar cells. Therefore, polysilicon solar cells account for a large share of the global solar cell output, and the manufacturing cost is also lower than that of monocrystalline silicon cells, so the use of polysilicon solar cells will increase the Will be more energy-saving, environmental protection!

In fact, there are many semiconductor materials available for the manufacture of solar cells. With the development of the material industry, there will be more and more varieties of solar cells. Solar cells that have been researched and trial-produced at present have many types of solar cells such as cadmium sulfide, gallium arsenide, copper indium selenide, and the like besides the silicon series. Usually, these materials are used to make amorphous silicon cells. However, these are not widely used commercially.

All in all, the area of use of single crystals will be relatively high, and the single crystals will be better in terms of area utilization; the polycrystalline market will have a relatively high proportion and will be widely used, and the price will also have certain advantages. Therefore, when selecting photovoltaic modules, we should select crystalline silicon photovoltaic modules with more mature products according to the actual situation. If we find it too complicated, we only need to remember that for the same power photovoltaic system, the power generation is the same.