Principle of solar cell power generation: A solar cell is a device that responds to light and converts light energy into electricity. There are many kinds of materials that can produce photovoltaic effect, such as: monocrystalline silicon, polycrystalline silicon, amorphous silicon, gallium arsenide, indium selenium copper and so on. Their power generation principles are basically the same, and the crystal is taken as an example to describe the photovoltaic power generation process. P-type crystalline silicon can be obtained by doping phosphorus to form N-type silicon, forming a PN junction. When the light irradiates the surface of the solar cell, some photons are absorbed by the silicon material; the energy of the photons is transferred to the silicon atoms, causing the electrons to migrate and become free electrons to gather on both sides of the PN junction to form a potential difference. When the circuit is turned on, under the action of this voltage, a current will flow through the external circuit to generate a certain output power. The essence of this process is: the process of converting photon energy into electrical energy. The process of making crystalline silicon solar cells: “Silicon” is one of the most abundant materials on our planet. Since scientists discovered the semiconductor properties of crystalline silicon in the 19th century, it has changed almost everything, even human thinking. At the end of the 20th century, “silicon” can be seen everywhere in our lives and its role. Crystalline silicon solar cells are the fastest industrialized in the past 15 years.The production process can be roughly divided into five steps: a, purification process b, rod drawing process c, slicing process d, battery manufacturing process e, packaging process. Application of solar cells: In the 1960s, scientists had already applied solar cells to space technology—communication satellite power supply. The form has become more intimate, not only in space applications, but also in many fields. Such as: solar garden lights, solar power household systems, independent power supply systems for villages, photovoltaic water pumps (drinking water or irrigation), communication power supplies, cathodic protection for oil pipelines, optical cable communication pump station power supplies, seawater desalination systems, road signs in cities and towns, highways Highway signs etc. Advanced countries such as Europe and the United States have incorporated photovoltaic power generation into urban power consumption systems and natural village power supply systems in remote areas into their development directions. The combination of solar cells and building systems has formed an industrialization trend
Post time: Dec-13-2022