CY6412 Polycrystalline Silicon Wafer

Polycrystalline Silicon Wafers Description

In contrast to single crystal silicon wafers, polycrystalline silicon wafers comprise multiple crystal structures that randomly form during the cooling process. Consequently, their surfaces exhibit varied structures and colours, giving them a patterned appearance. The production costs for polycrystalline silicon wafers are relatively low due to the simpler manufacturing process. However, since their crystal structure is less ordered than that of single crystal silicon wafers, their efficiency is somewhat lower.

Specifications for Polycrystalline Silicon Wafers

Applications of Polycrystalline Silicon Wafers

• Solar Energy: Polycrystalline silicon wafers are primarily used for the manufacture of solar cells, thereby contributing to the generation of clean and renewable energy.
• Electronics: Polycrystalline silicon wafers are also employed in the production of various electronic components such as transistors, diodes, and sensors.

Packaging of Polycrystalline Silicon Wafers

Our polycrystalline silicon wafers are carefully handled during storage and transportation to maintain the quality of our product in its original condition.

Frequently Asked Questions

Q1: How is a polycrystalline silicon wafer produced?

Answer: Polycrystalline silicon wafers are produced through:

• Melting high-purity polysilicon in a crucible.
• Pouring the molten silicon into a mould to form a polycrystalline ingot.
• Cutting the ingot into thin wafers using a wire saw.
• Polishing and cleaning the wafers for use in solar cells or other applications.

Q2: What is the difference between polycrystalline and monocrystalline silicon wafers?

Answer:

• Polycrystalline Wafers: They consist of multiple silicon crystals, are less expensive, have a lower efficiency (15-18% for solar cells), and exhibit a bluish speckled appearance.
• Monocrystalline Wafers: They are made from a single silicon crystal, are more expensive, have a higher efficiency (18%-22% for solar cells), and possess a uniform, dark appearance.

Q3: What is the lifespan of polycrystalline silicon wafers in solar modules?

• Answer: Solar modules made from polycrystalline silicon wafers generally have a lifespan of 25-30 years, during which the efficiency gradually decreases (approximately 0.5-1% per year).