conversion process

Principle
The sun light in the semiconductor p-n junction, the formation of a new hole electron pair, in the p-n node under the action of the electric field, the hole from n to p area, P area to area n by, connected to the circuit after the current form. This is known as the photoelectric effect the working principle of solar cells.
In a way, solar power solar power in two ways, one is light - heat - electricity conversion mode, another kind is the light - electricity direct conversion.
( 1) light - heat - electricity conversion mode through the use of solar radiation generated by thermal power generation,solar panel
is generally composed of a solar heat collector will be absorbed by the heat energy into refrigerant vapor, and then drives a turbine.
A process before it is light - heat conversion process; after a process of heat - electricity conversion process, as with an ordinary power. Solar power is very low efficiency and high cost, estimated that at least its investment than ordinary fire power your 5 to 10 times. A 1000MW solar thermal power plant needs to invest 20 to $2500000000, the average 1kW investment is 2000 ~ 2500 dollars. Therefore, at present only a small scale should be used for special occasions, and large-scale use of economically very uneconomical, also cannot with ordinary fire station or nuclear power station phase competition.
( 2) optical - electric direct conversion approach is the use of the photoelectric effect, solar radiation will be directly converted into electric energy, light - the basic power conversion is the solar cell device. Solar cell is a kind of volts due to the effects of photovoltaic solar energy directly into electrical energy device, a semiconductor diode, when the sun's light to the photodiode,solar module
photodiode will be the sun's light energy into electrical energy, generated current. When many cells are connected in series or parallel can be up to become a relatively large output power of solar cell array.
Solar cells is a promising new type of power supply, with a permanent, clean and flexibility of the three major advantages. Solar long battery life, as long as the sun, solar energy can be an investment and long-term use; and thermal power, nuclear power, solar battery will not cause environmental pollution; the solar battery can be large and medium-sized and small simultaneously,solar cell the million kilowatts of medium-sized power station, only for a small household solar battery, which is incomparable to other power supply
Battery raw materials: glass, EVA, batteries films, aluminum alloy shell, copper, stainless steel stent, Bao Xi battery