Polycrystalline silicon and monocrystalline silicon are two different substances. Polycrystalline silicon is a chemical term known as glass. High-purity polycrystalline silicon material is high-purity glass. Monocrystalline silicon is the raw material for making solar photovoltaic cells, and is also a material for making semiconductor chips. The production of silicon ore raw materials for single crystal silicon is scarce and the production process is complicated, so the yield is low and the price is high.
The difference between single crystal silicon and polycrystalline silicon lies in the arrangement of their atomic structures. The single crystals are ordered, and the polycrystals are disorderly arranged. This is mainly determined by their processing technology. Polycrystalline is usually produced by casting method, which is directly The silicon material is poured into the crucible to melt and shape, and the single crystal is modified by the Siemens method. The straight pull process is a process of atomic structure recombination. From our naked eye, monocrystalline silicon looks the same surface, and the polysilicon surface looks like there are a lot of broken glass inside, sparkling.
Monocrystalline solar panels: no pattern, dark blue, close to black after packaging.
Polycrystalline solar panels: There are patterns, polycrystalline and colorful, and polycrystalline and less colored, like the snow crystal pattern on the snowflake iron, light blue.
Amorphous solar panels: mostly glass, brown and brown