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How do solar panel work?

Posted:2020/5/27 0:00:00 Tags: solar panel

Summary The solar panel is composed of silicon atoms. You can think of atoms as bricks on buildings-just like Lego's building blocks, but because atoms are so small, you need special tools to see them. The so

The solar panel is composed of silicon atoms. You can think of atoms as bricks on buildings-just like Lego's building blocks, but because atoms are so small, you need special tools to see them. The solar cell comes from a silicon wafer layer, which is similar in size to a dinner plate, but much thinner-only about three times thicker than ordinary hair.

Turning the silicon crystal layer into a solar panel requires a special preparation process. The silicon crystal layer is heated to 1000 degrees Celsius, and then a layer of metal sheet is placed on the back of the layer, while a layer of metal with holes is covered on the solar cell Net and let this face rush to the sun. When 60 solar cells are prepared, they will be fixed on a layer of glass to make solar panels. Generally speaking, the solar power system on the roof has 10-50 solar panels, and millions of solar panels are installed in rural solar power plants.

Each silicon atom contains extremely small and extremely light-weight electrons, which have a weak charge. When the sunlight falls on the solar panel, it will hit one of the electrons and make it out of the electron orbit. These hit electrons can move freely, but the special structure of the battery allows the electrons to move in only one direction towards the sun. So when the sunlight falls on the solar cell, many electrons will leave their orbits and become free electrons. Because of the characteristics of solar cells, the electrons can only move upward, thereby generating a current that can drive household appliances. If the sunlight that falls on the solar cell is stronger, more electrons will be impacted off its orbit, and the greater the current generated. If the weather is not clear, the number of impacted electrons will decrease and the current generated will be reduced by 75% or more. At night, the solar panel does not generate any electrical energy, and the power supply at this time completely depends on the battery or other power sources.

How do solar panel work?