A photovoltaic system produces electricity by converting sunlight into electric current. Sunlightight has different wavelengths, and solar panels capture only the spectrum of Sunlight with the most energy. Therefore, to create a solar panel that is more effective at capturing Sunlight rays, manufacturers uses either monocrystalline or polycrystalline silicon. Both have their advantages and disadvantages for different applications. In this post, I will be talking about the manufacturing processes of polycrystalline solar panels.
Manufacturing Process Of Polycrystalline Solar panel
Polycrystalline silicon is a semiconductor used in solar cells. It is manufactured by melting sand with other silicon-rich minerals like quartz, to produce a molten silicon. This silicon is then poured into square molds and cooled, forming a thin silicon slab. A solar cell is a device that converts light energy into electrical energy. The outer layers of silicon are then chemically etched off to make the silicon surface porous. The remaining silicon is put into a furnace to grow crystals. The silicon crystals grow bigger and in a more random pattern to form polycrystalline solar panels.
Understanding The process
The manufacturing process for the polycrystalline silicon creates an uneven silicon surface with voids and pores. This means the electrons have a difficult time traveling through the silicon. These electrons are negatively charged atoms that travel from the silicon to a positively charged electrode, creating a current. The electrons travel through the silicon by jumping from one atom to the next, similar to stepping stones. The uneven surface makes the electrons jump from one atom to the next, sometimes missing the other atoms completely. This process is called “sudden conduction” and is one of the reasons why polycrystalline silicon is less efficient at producing electricity than monocrystalline silicon.
Why is Polycrystalline Solar panels Preferred?
Although monocrystalline silicon is more efficient at converting solar energy into electricity, it is significantly more expensive to produce. Polycrystalline silicon is less efficient at converting solar energy, but it costs less to manufacture, making it a more affordable option for consumers. If silicon efficiency is not a concern, polycrystalline silicon panels are often better suited for rooftop solar installations. This is because the silicon is less likely to break when exposed to mechanical stress.
Conclusion
Monocrystalline silicon is more efficient at converting light energy into electricity, making it more expensive. If silicon efficiency is not a concern, polycrystalline silicon panels are often better suited for rooftop solar installations. Ultimately, the type of solar panel that is best for your home depends on the amount of sunlight your roof receives. The amount of sunlight will vary based on your geographical location.
