The main material of Solar Panel
- By:Thai Trade
The main material used in the production of solar panels is silicon. Silicon is a semiconductor material that has the ability to convert sunlight into electricity. It is abundant in the Earth's crust and has excellent electrical properties that make it suitable for solar panel applications.
Solar panels are typically made of silicon solar cells, which are made from thin wafers of crystalline silicon. The most commonly used types of silicon in solar panels are monocrystalline silicon and polycrystalline silicon.
Monocrystalline Silicon: Monocrystalline solar panels are made from single-crystal silicon, where the silicon material is grown as a single, uniform crystal structure. The manufacturing process involves slicing thin wafers from a cylindrical silicon ingot. Monocrystalline silicon solar cells are known for their high efficiency and uniform appearance, but they are more expensive to produce.
Polycrystalline Silicon: Polycrystalline solar panels are made from multiple silicon crystals. The silicon material is melted and poured into molds to form rectangular blocks, which are then cut into square wafers. Polycrystalline silicon solar cells have a lower efficiency compared to monocrystalline cells but are more cost-effective to manufacture.
In addition to silicon, solar panels also consist of other materials, including:
1. Conductive Metal Contacts: Metal contacts, typically made of silver or aluminum, are used to collect the electric current produced by the solar cells and transport it out of the panel.
2. Glass or Plastic Encapsulation: Solar cells are encapsulated between a front cover and a backsheet. The front cover is usually made of tempered glass or a transparent plastic material, which protects the solar cells from external elements while allowing sunlight to pass through.
3. Backsheet: The backsheet is a protective layer at the back of the solar panel, usually made of a polymer material, such as Tedlar or TPT (Tedlar-PET-Tedlar). It provides insulation and protects the solar cells from moisture and environmental damage.
4. Frame and Mounting Structure: Solar panels are typically framed with aluminum or steel to provide structural support and protect the edges of the panel. The frame also facilitates easy installation and mounting of the solar panels.
These materials work together to create a durable, efficient, and weather-resistant solar panel that can convert sunlight into usable electricity.