Below we will introduce in detail the most popular clean energy, solar cells (Photovoltaic, abbreviated as PV), three common types:

　　Monocrystalline silicon solar cell

　　1. Monocrystalline silicon solar cells

　　Its manufacturing process is to first cut high-purity single crystal silicon rods into slices, and then form a PN junction through a series of semiconductor processes. Then, the grid lines are made by screen printing, and the back electrodes are made through a sintering process, and finally the single piece is made.

　　The single chips can be assembled into solar cell modules (solar panels) in series and parallel according to the required specifications to achieve a certain output voltage and current. Finally, the frame is used for packaging, and the solar cell modules are formed into various solar cell arrays of different sizes.

　　At present, the photoelectric conversion efficiency of monocrystalline silicon solar cells is about 20-25%, and the laboratory results are more than 30%.

　　Polycrystalline silicon solar cell

　　2. Polycrystalline silicon solar cells

　　It attaches a polysilicon film to a low-cost substrate material, which not only maintains high performance and stability, but also greatly reduces the amount of material used, which significantly reduces battery costs.

　　The production process of polycrystalline silicon solar panels is similar to that of monocrystalline silicon solar panels. Its photoelectric conversion efficiency is about 20%, which is slightly lower than that of monocrystalline silicon solar cells. However, the material is easy to manufacture, saves power consumption, and has a lower total production cost. So, it has been developed a lot.

　　Amorphous silicon solar cell

　　3. Amorphous silicon solar cells

　　It is completely different from the manufacturing method of crystalline silicon solar cells. The silicon material consumption is very small and the power consumption is lower. It is very thin and can be made into a laminated type or manufactured by an integrated circuit method to make multiple batteries in series at a time to obtain a higher voltage. At present, the photoelectric conversion efficiency of amorphous silicon solar cells is low, and the international advanced level is about 12%.

　　Lithium-ion battery (LIB) has become the main energy storage solution in modern social life. Among them, lithium iron phosphate batteries are a perfect replacement for lead-acid batteries, and they are the first choice for grid-connected peak shaving, off-grid energy storage, photovoltaic energy storage, UPS, data center and other industries.

　　Solar power generation system with lithium battery energy storage system is a very promising clean energy.