Solar panels, is a kind of solar energy into electrical energy products, is a kind of green energy, but also the current popularity of new products, such as water heaters, bicycles, electric vehicles, etc., are powered by solar panels, then, what are the solar panels?
1. 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 its photoelectric conversion efficiency is about 12%. In terms of production cost, it is cheaper than monocrystalline silicon solar cells, simple material manufacturing, saving electricity consumption, and lower total production costs, so it has been greatly developed. In addition, the service life of polycrystalline silicon Sichuan solar cells is also shorter than that of monocrystalline silicon solar cells. In terms of performance-price ratio, monocrystalline silicon solar cells are slightly better.
2. Amorphous silicon solar cells Amorphous silicon Sichuan solar cells are a new type of thin-film solar cells that appeared in 1976, which is completely different from the production method of monocrystalline silicon and polycrystalline silicon solar cells, the process is greatly simplified, silicon material consumption is very small, electricity consumption is lower, its main advantage is that it can also generate electricity under weak light conditions. However, the main problem of amorphous silicon solar cells is that the photoelectric conversion efficiency is low, the international advanced level is about 10%, and it is not stable enough, and its conversion efficiency decays with the extension of time.
3. Monocrystalline silicon solar cells The photoelectric conversion efficiency of monocrystalline silicon solar cells is about 15%, and the highest reaches 24%, which is the highest photoelectric conversion efficiency among all types of solar cells, but the production cost is so large that it cannot be widely used. Since monocrystalline silicon is generally encapsulated with tempered glass and waterproof resin, it is strong and durable, and its service life can generally reach 15 years and up to 25 years.
4. Multi-compound solar cells Multi-compound solar cells refer to solar cells that are not made of single-element semiconductor materials. There is a wide variety of research in various countries, most of which have not yet been industrially produced. Semiconductor materials with gradient band gaps (energy level differences between the conduction band and valence bands) can expand the spectral range of solar energy absorption, thereby improving the photoelectric conversion efficiency. Based on it, thin-film solar cells with significantly higher photoelectric conversion efficiency than silicon thin-film solar cells can be designed.