Photovoltaic power generation is the basic principle and characteristics of what?

Photovoltaic power generation technology is through the light born v effect of semiconductor materials to generate electricity, solar cells, after a series of packaging protection can form a large area of solar cell components, combined with power control device can be composed of photovoltaic power generation device.

photovoltaic technology through the photovoltaic effect of semiconductor materials to produce electricity. Solar cells in series to encapsulate protection, form a large area of solar cell module, can combine with power control device form a photovoltaic device. At present, the industry, there are two types of photovoltaic panels: one is single crystal single photovoltaic panels, the other is a polycrystalline double-sided photovoltaic panels. Polycrystalline solar panels is the back of the pv modules can take advantage of the advantages of the reflected light from the ground to generate electricity. In general, the photovoltaic panels that sells on the market of about 290 watts, and on the back of the power can reach 30 - general 40 watts of solar panel use semiconductor material silicon as the substrate. In the process of production, in the silicon doping boron ( B) The substrate is a p-type semiconductor, and doped phosphorus ( P) The substrate is n-type semiconductor. When a p-type and n-type semiconductor semiconductor, produce electric potential difference, as battery anode p-type semiconductor produce negative charge, as a battery cathode of n-type semiconductor produce positive charge an empty hole. When the sun in the N and P on the photovoltaic panels, internal carrier will accelerate the production speed, and due to the directional movement of positive and negative charge on the inside will generate an electric current. Can say, the whole process of the photovoltaic effect depends on the semiconductor photoelectric effect, the entire process is almost clean and pollution-free. It is an ideal clean energy. Traditional photovoltaic cells to the single structure, the battery positive negative electrode, on the back as the positive electrode; At present, the new double-sided photovoltaic panels on the market can double power generation, and the two sides the polarity of battery related to the substrate of semiconductor material. If the substrate is N type, use p-type material on the surface, the surface concentration higher than N N + materials used, including P type is the positive electrode, the N + is negative electrode, and if the substrate is P type, on the surface is N, the surface concentration is higher than that of P type semiconductor, P + polarity in contrast to the N type. Whether it is from the world or from China, conventional energy is very limited. China's primary energy reserves is far lower than the world average, only about 10% of the world's total reserves. Solar energy is inexhaustible, inexhaustible and renewable energy. It has enough cleanliness, absolute security, relative commonality, reliable, long life and free maintenance, sufficient resources and potential of the economy. It plays an important role in long-term energy strategy.