Solar panels? What does it have? How to differentiate?

Solar panels? What does it have? How to differentiate?

(1) Monocrystalline silicon solar cells

At present, monocrystalline silicon solar cell photoelectric conversion efficiency of about 15%, the highest reached 24%, which is currently all types of solar cells in the highest photoelectric conversion efficiency, but the production cost is so great that it can not be a wide range of And commonly used. As the single crystal silicon glass and waterproof resin are generally used for packaging, so its ruggedness, the service life of up to 15 years, up to 25 years.

(2) polycrystalline silicon solar cells

The production process of polycrystalline silicon solar cells is similar with 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% (the listing efficiency of Sharp in Japan on July 1, 2004 is 14.8% The world's most efficient polysilicon solar cell). Speaking from the production costs, monocrystalline silicon solar cells cheaper than some, material manufacturing is simple, saving power consumption, the total cost of production is low, so a lot of development. In addition, the service life of polycrystalline silicon solar cells is also shorter than monocrystalline silicon solar cells. In terms of cost performance, monocrystalline silicon solar cells are slightly better.

(3) amorphous silicon solar cells

Amorphous silicon solar cell is a new type of thin-film solar cell that appeared in 1976. It is totally different from single-crystal silicon and polycrystalline silicon solar cell. The process is greatly simplified, the consumption of silicon material is less and the power consumption is lower. The main advantage is that it can also generate electricity in low light conditions. However, the main problem existing in amorphous silicon solar cells is the low photoelectric conversion efficiency. At present, the international advanced level is about 10%, which is not stable enough. As time goes by, the conversion efficiency decays.

(4) Diversified compound solar cells

Polycrystalline solar cells that are not made of a single element of semiconductor materials, solar cells Now studied a wide variety of countries, most have not yet been industrialized production, mainly in the following categories:

a) Sulfated solar cells

b) Gallium arsenide solar cells

c) copper indium selenium solar cell (a novel multi-bandgap gradient Cu (In, Ga) Se2 thin film solar cell)

Cu (In, Ga) Se2 is a high-performance solar absorption material with a gradient energy gap (difference in energy level between the conduction band and the valence band). A variety of semiconductor materials can expand the solar absorption spectral range and further improve the photoelectric Conversion efficiency. Based on it, the thin film solar cell whose photoelectric conversion efficiency is obviously higher than that of the silicon thin film solar cell can be designed. The photoelectric conversion rate can be achieved is 18%, moreover, such thin-film solar cells so far, no effect of light radiation caused by performance degradation (SWE) was found, the photoelectric conversion efficiency than the current commercial thin-film solar panels to improve about 50 ~ 75%, the highest level of photoelectric conversion efficiency in thin-film solar cells worldwide.