Why do you want to develop the solar photovoltaic industry?

From what is solar energy to solar energy application technology related to explain, believes that many people have a general knowledge of solar energy, solar energy application technology in the photovoltaic power generation, says below mainly two aspects: the principle and advantages. Solar photovoltaic hair

from what is solar energy to the interpretation of the solar energy application technology, I believe that many people have a general understanding of solar energy. Let's talk about solar energy application technology in the photovoltaic power generation, mainly from two aspects: the principle and advantage. Solar photovoltaic power generation principle of the photoelectric effect in both liquid and solid substances exist, but only the solid ( Especially the semiconductor PN junction device) With high photoelectric conversion efficiency in the sun. Using the photovoltaic effect principle made of crystalline silicon solar cells can convert solar energy into electrical energy directly. Solar photovoltaic energy converter is solar cells, also called a photovoltaic cell, is the basis of the solar photovoltaic power generation systems and core components. Convert solar energy into electrical energy process mainly includes three steps: ( 1) Solar cells to absorb certain after the photon energy, in the form of empty hole to produce in the semiconductor electronics, this is known as a 'carrier'. The opposite polarity, electronic negatively charged, and empty hole positively charged. ( 2) Opposite polarity photoproduction carrier by semiconductor PN junction of electrostatic field to separate. ( 3) The positive and negative electrodes of solar cells were collected photoproduction current-carrying electrons and holes is empty and generate electricity current in an external circuit. When light to the surface of the solar cell, some photons is absorbed by silicone material, and the photon energy is transferred to the silicon atoms, electrons into free electrons, the free electrons to form potential difference on both sides of the gathered at the p-n junction. When the external circuit, in under the action of the voltage, electric current will flow through an external circuit to generate certain output power. This process is the essence of the photon energy into electrical energy. Photovoltaic (pv) power generation has economic advantages. Solar energy use efficiency can be in two ways: one is the solar energy is inexhaustible, accept solar without 'tax'; It can be used in any place. Second, the current technology development level, some got economic use of solar energy. With the development of science and technology and human development and utilization of solar energy technology breakthrough, solar energy utilization of economy will be more obvious. If the 20th century is the century of oil, then the 21st century is the century of renewable energy ( The century of solar energy) 。 From the perspective of the construction cost of solar energy photovoltaic power station, with the large-scale application of solar photovoltaic power generation and the promotion, especially in mature industries and upstream silicon photovoltaic power generation technology, as well as building roofs and walls platform of comprehensive exploitation and utilization, the construction of solar photovoltaic power generation per kilowatt cost less and less. Compared with other renewable energy, it has the same economic advantage, with the implementation of 'affordable, its promotion will be more and more widely. According to the calculation, the amount of solar energy reaching the earth's surface in a year is equivalent to about 1. 892 x10 ^ 24 tons of standard coal, is the world's major energy has proven reserves of 10000 times. The service life of the sun is still at least 4 billion years. Compared with the human history, solar energy will continue to supply to earth's time is infinite, it determines the development and utilization of solar energy will be an effective way to resolve the shortage of conventional energy and dried up.