The main material of solar photovoltaic panels is silicon, which is usually made of different types of silicon wafers such as monocrystalline silicon, polycrystalline silicon or amorphous silicon, to absorb and convert sunlight into electrical energy.
Monocrystalline silicon photovoltaic panels are composed of silicon wafers made from single crystals. This type of solar panel has high conversion efficiency and stability, and is therefore widely used in the field of solar power generation.
Polycrystalline silicon photovoltaic panels are silicon wafers made by combining multiple fragments. Compared to monocrystalline silicon photovoltaic panels, this type of solar panel has a lower manufacturing cost and is more economical. However, due to defects in the material, which hinder electron movement, its conversion efficiency is lower.
What is the photoelectric conversion efficiency of polycrystalline silicon photovoltaic panels?
The photoelectric conversion efficiency of polycrystalline silicon varies depending on factors such as manufacturing process, impurities, and particle size. The photoelectric conversion efficiency of ordinary polycrystalline silicon is typically around 16%-18%, while the photoelectric conversion efficiency of high-quality solar-grade polycrystalline silicon can reach over 20%.
Furthermore, in practice, the photoelectric conversion efficiency of polycrystalline silicon can be further improved by changing the doping type and concentration of silicon, the structural design of photovoltaic cells, and the composition of photosensitive materials.
