Monocrystalline siliconThe four corners of the cell are arc-shaped, with no pattern on the surface;Polycrystalline siliconThe four corners of the cell the cell is 1653. It has square corners and a pattern similar to ice flowers on the surface.
For users, there is not much difference between monocrystalline silicon cells and polycrystalline silicon cells. Monocrystalline silicon cells and polycrystalline silicon cells have very good lifespan and stability. Although the average conversion efficiency of monocrystalline silicon cells is about 1% higher than that of polycrystalline silicon cells.
However, since monocrystalline silicon solar cells can only have a quasi-square shape (its four corners are arcs), part of the area cannot be filled during formation of a module of solar cell, while polycrystalline silicon solar cells cells are square. This problem does not exist, so the efficiency of the solar module is almost the same.
In addition, due to the different manufacturing processes of the two solar cell materials, the energy consumed in the manufacturing process of polycrystalline silicon solar cells is about 30% lower than that of solar cells monocrystalline silicon solar panels. Polycrystalline silicon solar cells account for the largest share of the world's solar cells. The share of total production is becoming larger and larger, and the manufacturing cost will be much lower than that of monocrystalline silicon solar cells, so the use of polycrystalline silicon solar cells will be reduced. more energy efficient and environmentally friendly.
When molten elementary silicon solidifies, the silicon atomsum are arranged in a diamond lattice into numerous crystal nuclei. If these crystal nuclei transform into grains with the same orientation of the crystal plane, monocrystalline silicon is formed. If these nuclei transform into grains with different crystal plane orientations, polycrystalline silicon is formed. The difference between polycrystalline silicon and monocrystalline silicon is mainly reflected in physical properties. For example, in terms of mechanical and electrical properties, polycrystalline silicon is inferior to monocrystalline silicon. Polycrystalline silicon can be used as a raw material to extract monocrystalline silicon.
Polysilicon is good. The energy consumed in the manufacturing process of polycrystalline silicon solar cells is approximately 30% lower than that of monocrystalline silicon solar cells. Therefore, silicon solar cells pPolycrystalline accounts for a significant portion of the total global solar cell production, and so does the manufacturing cost. lower than that of monocrystalline silicon cells. Therefore, using polycrystalline silicon solar cells will be more energy efficient and environmentally friendly.
Comparison between monocrystalline and polycrystalline:
1. Looking at history, monocrystalline photovoltaic panels have been used earlier than polycrystalline photovoltaic panels. Monocrystalline is the big brother and polycrystalline is the little brother. Later, it grew rapidly.
2. Regarding usage, the application of polycrystalline silicon in power plants is much higher than that of monocrystalline silicon which accounts for 20% and that of polycrystalline silicon 80%. the real situation.
3. Looking at the appearance, mono siliconcrystalline is dark blue, almost black, polycrystalline silicon is sky blue and monocrystalline cells have arc-shaped corners and polycrystalline cells are square.