Solar panels are made of semiconductor photovoltaic effect, which can directly convert solar radiation into electric energy. Semiconductor materials with strong photovoltaic effect change the distribution and concentration of electrons and holes of conductive carriers when absorbing photons with certain energy. When light is irradiated on the semiconductor P/n junction, a photovoltaic voltage will be generated at both ends. When an external circuit is connected, under the action of this voltage, a current will flow through the external circuit, resulting in a certain output power. In this process, the photocell itself does not have any chemical reaction or rotational wear. Therefore, there is no noise and environmental pollution in the process of using solar cells, which is incomparable to other forms of power generation.
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