? On rainy days when there is no sunelectricity cannot be produced. The photovoltaic power generation systemmust be directly exposed to sunlight to produce electricity. At night, when it rains, when there are heavy clouds, etc., without sunlight, it is impossible to produce electricity.
Sunlight shines on the p-n junction of the semiconductor, forming new hole-electron pairs. Under the action of the electric field of the p-n junction, the holes flow from the p region to the n region and the electrons flow. of region n. In region p, a current forms after the circuit is turned on. This is how photovoltaic solar cells work.
Solar power generation methods There are two solar power generation methods, one is the light-heat-electricity conversion method and the otherre is the direct light-to-electricity conversion method.The light-heat-electricity conversion method generates electricity using thermal energy generated by solar radiation. Typically, a solar collector converts absorbed thermal energy into a steam turbine that generates a working fluid. The first process is a process of converting light into heat; the second process is a process of converting heat into electricity.
The direct light-to-electricity conversion method uses the photoelectric effect to directly convert solar radiation energy into electrical energy. The basic device for converting light into electricity is the solar cell.
A solar cell is a device that directly converts solar energy into electrical energy through the photovoltaic effect. When the sun shines on the photodiode, the photodiode converts light energyconverting the sun into electricity. energy and generate current. When many batteries are connected in series or parallel, relatively large output power can be obtained.Technological development:
Nowadays, light energy and wind energy can be used to generate electricity, and more and more Environmentally friendly electricity production methods are emerging. Reference for the above content: Baidu Encyclopedia-Solar Panel