Basic physical and chemical properties of crystalline silicon
The electrical properties of siliconSilicon is a typical semiconductor material, and its resistivity is about 10-4~1010Ω·cm. The conductivity and conductivity type are related to the impurities in the silicon crystal. Intrinsic semiconductor silicon does not contain impurities and defects, and its resistivity is very high; when a small amount of impurities is added, its conductivity…
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Structure of crystalline silicon solar cell
Solar cells are semiconductor optoelectronic devices that directly convert solar radiant energy into electrical energy. As early as 1939, the French physicist Alexander-Edmond Becquerel discovered the photovoltaic effect. The so-called photovoltaic effect means that when light irradiates a solid or liquid system with two electrodes, a voltage can be generated between the electrodes. Solar cells…
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Solar photovoltaic system classification
Solar photovoltaic systems have different forms in different applications. Generally, solar photovoltaic systems can be divided into independent photovoltaic systems and grid-connected photovoltaic systems. Independent photovoltaic systemIndependent photovoltaic system refers to the formation of a solar photovoltaic power generation system into an independently operating power generation system, which directly converts the received solar radiation energy…
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Controllers, converters, loads in solar photovoltaic systems
ControllerThe main function of the controller in the photovoltaic power generation system is to control the charging/discharging of the battery according to the characteristics of the battery, so as to extend the service life of the battery. In various types of photovoltaic power generation systems, the controllers used are different, and their functions and complexity…
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Solar cell square array and storage battery in solar photovoltaic system
The characteristic of solar power technology is that solar energy is an inexhaustible renewable energy source, and the initial energy cost is extremely low; the power of solar photovoltaic power supply or photovoltaic power station can be configured from a few milliwatts to tens of megawatts according to the needs. The system construction period is…
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The distribution of solar energy resources in China and the characteristics of solar energy
China is one of the countries rich in solar energy resources. More than 2/3 of the country’s total area has an annual sunshine time of more than 2000h, and an annual radiation amount of more than 5000MJ/m². According to statistical data analysis, the total amount of solar radiation received by China’s land area each year…
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The relationship between the sun and the earth
Solar energyThe sun is a hot gas planet composed mainly of hydrogen and helium, with a diameter of about 1.392×106km and a distance of about 1.496×108km from the earth. The sun is the most energetic, natural and stable natural radiation source. Its center temperature is 1.5×107k, and the effective surface temperature is 5762K. The polynuclear…
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