solar cell panel

Thermal - electrical conversion of solar radiation through the use of the heat energy generated
Solar panels solar lighting in the semiconductor pn junction, the formation of new electron --- hole in the p --- n junction electric field, the hole flow from the p-n area, the flow of electrons from p-n Zone , connected to the circuit after the formation of current. This is the photovoltaic solar cell works. Solar power generation solar power in two ways, one is light - heat - electricity conversion, and the other is light - electric direct conversion. (1) - thermal - electrical conversion of solar radiation through the use of the heat energy produced, usually by the solar collectors to convert the heat absorbed by refrigerant vapor then drives turbines to generate electricity. The former is a process - thermal conversion process; after a process of heat - electricity conversion process, as with ordinary thermal power. Drawback is that solar thermal power generation efficiency is low and the cost is high, estimated at least its investment than the average fire 5 to 10 times your power. a 1000MW of solar thermal power plants need to invest in 20 to 25 billion U.S. dollars, the average investment for the 1kW 2000 to 2500 U.S. dollars. Therefore, it is only used in small-scale special occasions, and large-scale use in the economy is very uneconomical, but also not with the ordinary power plant or nuclear power plants to compete.