Power generation principle of solar photovoltaic modules

2023-03-07

For positive and negative charges, since the positive and negative charges in the PN junction region are separated, an external current field can be generated, and the current flows from the bottom end of the crystalline silicon wafer cell through the load to the top of the cell. This is the "photovoltaic effect". When a load is connected between the upper and lower surfaces of a solar cell, current will flow through the load, so the solar cell generates current; the more photons the solar cell absorbs, the greater the current generated. The energy of a photon is determined by the wavelength. A photon with an energy lower than the basic energy cannot generate free electrons. A photon with an energy higher than the basic energy will only produce a free electron. The excess energy will heat the battery, and the effect of power loss will make the solar cell. The efficiency of the cell decreases.

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Introduction of main raw materials and components of solar photovoltaic modules

2023/03/08