The sun light on semiconductor p-n junction, to form a new hole - electron pair, in the electric field under the action of p-n junction, hole by n to p areas, electronic from p to n area, processing circuit to form a current.
This is how photoelectric effect solar cells work.
There are two ways of solar power generation, one is light - heat - electricity conversion, and the other is light - electricity direct conversion.
(1) light - heat - electricity conversion mode through the use of solar radiation produced by thermal, generally the heat energy is absorbed by the solar collector will be converted into working medium steam, to drive a turbine to generate electricity.
The first process is the photothermal conversion process;
The latter process is the thermal - electrical conversion process.
(2) photoelectric direct conversion is to use the photoelectric effect to convert solar radiation directly into electricity, and the basic device of photoelectric conversion is solar cell.
Solar cell is a kind of effect by Yu Guangsheng volts and convert sunlight directly into electrical energy device, is a semiconductor photodiode, when the sun light to the photodiode, photodiode can turn the sun's light energy into electrical energy, an electrical current.
When many batteries are connected in series or in parallel, they can become the square matrix of solar cells with relatively large output power.