When we want to choose a street lamp material, we can take a look at the most popular and popular solar street lamp on the market. What are some of his advantages in use? Because the most important thing in the choice of this street lamp is its operational stability, try to avoid some damage during use, because street lamps can be said to be an important tool for us to walk in the dark, and the advantages of solar street lamps There are still quite a few, and it can save us energy very well.
Solar cell is a device that responds to light and can convert light energy into electricity. There are many kinds of materials that can produce photovoltaic effect, such as: single crystal silicon, polycrystalline silicon, amorphous silicon, gallium arsenide, indium copper selenium and so on. Their power generation principles are basically the same, and now take crystalline silicon as an example to describe the process of photovoltaic power generation. P-type crystalline silicon can be doped with phosphorus to obtain N-type silicon, forming a P-N junction.
When the light irradiates the surface of the solar cell, part of the photons are absorbed by the silicon material; the energy of the photons is transferred to the silicon atoms, causing the electrons to undergo transitions, becoming free electrons, gathering on both sides of the PN junction to form a potential difference. When the circuit is connected to the outside Under the action of this voltage, there will be a current flowing through the external circuit to produce a certain output power. The essence of this process is: the process of converting photon energy into electrical energy.
