The principles of solar power generation are basically the same. Today, crystalline silicon is used as an example to describe the photovoltaic power production process. Crystalline P-type silicon can be doped with phosphorus to obtain N-type silicon, forming a PN junction. When 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 transition and transform in free electrons which gather on both sides of the P-N junction to form a potential difference, when the external circuit is connected, under the action of this voltage, a current will flow through the external circuit to produce a certain output power .
Photovoltaic energy production is a method of direct energy production that uses devicesSolar-grade solid-state electronic devices to efficiently absorb energy from solar radiation and convert it into electrical energy. It is now the mainstream of solar energy production. In photochemical power generation, there are currently electrochemical photovoltaic cells, photoelectrolytic cells and photocatalytic cells.
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Solar power generation has many unique advantages:
1. Solar energy is inexhaustible and can be used in an inexhaustible and clean way. Solar energy and solar photovoltaic power generation are safe and reliable, and will not be affected by the energy crisis and fuel market instability;
2. The sun shines on the earth and solar energy is available everywhere. photovoltaic energy production is particularly suitable for remote areasns electricity and will reduce energy losses during the construction of long-distance power networks and transmission lines;
3. Solar power generation does not require fuel, significantly reducing operating costs;< /p>
4. In addition to the tracking type, photovoltaic solar power generation has no moving parts, so it is not easily damaged, is relatively easy to install, and is simple to maintain;< /p>
5 . Photovoltaic solar energy production produces no waste. It does not produce noise, greenhouse gases or toxic gases, making it an ideal clean energy source. Installing a 1kW photovoltaic power generation system can reduce CO2600~2300kg, NOx16kg, SOx9kg and other particulate matter emissions by 0.6kg per year.
Baidu Encyclopedia - Solar Energy Production