Power generation principle of solar panel

The sun shines on the semiconductor p-n junction, forming a new hole electron pair. Under the effect of the electric field of the p-n junction, holes flow from the p region to the n region, and electrons flow from the n region to the p region. After the circuit is connected, a current is formed. This is the working principle of photoelectric effect solar cells.

Solar power generation There are two ways of solar power generation, one is light heat electricity conversion, the other is light electricity direct conversion.

(1) The light heat electricity conversion mode uses the heat energy generated by solar radiation to generate electricity. Generally, the solar collector converts the absorbed heat energy into steam of working medium, and then drives the steam turbine to generate electricity. The first process is the light heat conversion process; The latter process is a thermal electrical conversion process.

(2) Photoelectric direct conversion is to convert solar radiation energy directly into electric energy by using photoelectric effect. The basic device of photoelectric conversion is solar cell. Solar cell is a device that directly converts solar energy into electrical energy due to photovoltaic effect. It is a semiconductor photodiode. When the sun shines on the photodiode, the photodiode will convert solar energy into electrical energy and generate current. When many cells are connected in series or in parallel, they can become a solar cell array with relatively large output power.