1. Working principle of silicon wafer
Silicon wafer is silicon wafer, which is one of the core materials of solar cells. As one of the components of solar cells, silicon wafer plays an important role in converting light energy into electricity. The basic principle of silicon wafer is to use light to irradiate its surface, stimulate free electrons and holes, and form current. Specifically, its working principle can be summarized as follows:
1. Light absorption: When light is irradiated on the surface of silicon wafer, the energy of photons will be absorbed by the silicon wafer and converted into electron energy.
2. Energy band: The electron energy level in the silicon wafer becomes an energy band with a small energy gap. After exciting the light to merge the energy band device, the electron energy level will rise to the conduction band, thereby generating current, which is the electricity generated by the solar cell.
2. How to convert solar energy into electricity
Solar cells are devices that convert sunlight into electricity, mainly composed of silicon wafers, electronic wires, metal plates and glass. Solar cells are mainly divided into silicon wafer type solar cells and non-silicon wafer type solar cells, among which the working principle of silicon wafer type solar cells has been explained in detail in the above section.
The working process of solar cells is as follows:
1. Sunlight shines on the "glass cover" above the silicon wafer, and the light passes through the "glass cover" directly to the surface of the silicon wafer.
2. The energy of the photon is absorbed by the silicon wafer and converted into electronic energy.
3. The electrons are released from the silicon wafer and move toward the positive electrode, while the holes also move toward the negative electrode.
4. The solar panel and the power supply are connected through electronic wires, and the electrons and holes are directed to the load to generate current.
Summary: In the process of converting solar energy into electrical energy, the silicon wafer is the core device that converts light energy into electrical energy, and the solar cell is the output of the electrical energy converted by the silicon wafer. Through light absorption and the movement of energy bands, solar cells convert solar energy into electrical energy.