Crystalline silicon material is the most important photovoltaic material. Its properties are gray-black solid with metallic luster, high melting point (1410), high hardness, brittleness, and inactive chemical properties at normal temperature. Currently widely used in semiconductor, solar photovoltaic power generation and other aspects. The following batteries can be made in the battery field:
1. Monocrystalline silicon solar cell
At present, the photoelectric conversion efficiency of single crystal silicon solar cells is about 17%, and the highest is 24%. This is the highest photoelectric conversion efficiency among various solar cells, but the production cost is too large to be widely used. And commonly used. Since monocrystalline silicon is usually packaged in tempered glass and waterproof resin, it is durable and has a service life of up to 25 years.
2. Polycrystalline silicon solar cells
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 is much lower, and the photoelectric conversion efficiency is about 15%. In terms of production cost, it is cheaper than monocrystalline silicon solar cells, simple material manufacturing, power saving, and low total production cost, so it has been greatly developed. In addition, the life of polycrystalline silicon solar cells is also shorter than that of monocrystalline silicon solar cells. In terms of performance and price ratio, monocrystalline silicon solar cells are slightly better.
3. Amorphous silicon solar cell
Amorphous silicon solar cells (thin film solar cells) are new thin film solar cells that emerged in 1976. They are completely different from monocrystalline and polycrystalline solar cells. This process is greatly simplified, with low silicon material consumption and low power consumption. The main advantage of the reduction is that it can generate electricity in low light conditions. However, the main problem of amorphous silicon solar cells is that the photoelectric conversion efficiency is low. At present, the international advanced level is about 10% and it is not stable enough. Conversion efficiency will decrease over time.