We can find that solar energy products are everywhere in our lives. We still have some energy vehicles. These vehicles do not need to be refueled. They generate electricity based on the first nuclear energy emitted by solar energy. Of course, the most important of them is That is, there will be a solar cell in it, not only this kind of energy car, but also some solar street lights that are more common in our lives. Therefore, he used some of the larger physical ones, and they are very popular in the current market. He is the basis for the production of such solar objects.
At present, crystalline silicon materials (including polycrystalline silicon and monocrystalline silicon) are the most important photovoltaic materials, with a market share of more than 90%, and will remain the mainstream materials for solar cells for a long period of time in the future. The production technology of polysilicon materials has long been in the hands of 10 factories in 7 companies in 3 countries, including the United States, Japan, and Germany, forming a technology blockade and market monopoly. The demand for polysilicon mainly comes from semiconductors and solar cells. According to different purity requirements, it is divided into electronic grade and solar grade. Among them, electronic grade polysilicon accounts for about 55%, and solar grade polysilicon accounts for 45%. With the rapid development of the photovoltaic industry, the demand for polysilicon from solar cells is growing faster than the development of semiconductor polysilicon. The demand will exceed electronic grade polysilicon. In 1994, the total output of solar cells in the world was only 69MW, but in 2004 it was close to 1200MW, which was an increase of 17 times in just 10 years.
