China is the world’s largest solar batteries manufacturing base. But Chinese solar battery enterprise embarrassed, the Chinese government will build the world largest solar power to a U.S. olive.
American local time on September 8, China’s government and American first solar energy company signed memorandum FirstSolar (), both in Inner Mongolia ordos construction plan of 200 million kilowatts of solar power plants. This will be the world’s largest solar power plant, for 300 million households.
In two weeks ago, the Chinese government has formally, polycrystalline silicon solar cell industry and repetitive construction phenomenon. At this juncture, the Chinese government and the solar energy company why the solar power plant start-up ordos high-profile projects?
One reason is probably the first solar companies not polycrystalline silicon solar energy cell attack. Actually, the company is the leader of the film solar battery technology.
The super large orders and film solar cells portends in China and in the world to get more.
Polysilicon surplus
And the first solar energy company, China’s enterprises of production are basically polycrystalline silicon solar energy cell, its main raw material for polysilicon.
Compared with the film solar cells, polycrystalline silicon solar photoelectric conversion efficiency is higher. Film solar cells usually less than 10%, and polycrystalline silicon solar energy cell mostly in more than 14%.
But the biggest advantage of film solar cells, can not use expensive silicon, materials needed less polycrystalline silicon solar energy consumption is significantly below polycrystalline silicon solar energy cell.
Of course, the film solar higher technical difficulties, considered polycrystalline silicon solar energy cell after the next generation of technology.
A few years ago, because of polycrystalline silicon shortage, the international market prices of polysilicon once per ton hundreds of dollars. In this context, the local Chinese more polysilicon production horse. As a result of overcapacity, plus the financial crisis, the price of polysilicon dropped substantially.
On August 26, the standing committee of state council meeting, wind and polycrystalline industries are considered “duplicate construction.
On the same day, ministry of industry and information in the ZhuHongRen chief engineer at a conference also said: “the solar, wind and other emerging industry repetitive construction, disorder of problem cannot be ignored.”
Meanwhile, in the process of polysilicon production energy consume, and four chlorinated silicon toxic by-product pollution to the environment, and also has a lot of criticism.
Because China’s polycrystalline silicon solar energy cell product export to the most developed countries, some image to call “consumption, pollution,”.
In polycrystalline silicon solar energy cell was preoccupied elsewhere in the solar battery, family members – another film solar cells to very conspicuous.
Film
Over the past few years, the production of film solar cells in high-speed growth.
According to a market research company DisplaySearch released in August 11, the solar cell production trends report, 2009 film solar cells productivity for 358 million kilowatts.
The report also shows that the company in 2005, film solar cells in the whole solar battery capacity of about 5% of the 2009, is expected to exceed 20%.
China’s power investment group Co., LTD, a xian solar power for the technical personnel news of scientific explanation: “just as its name implies, the film is a layer of film battery will be prepared to solar battery, due to its use silicon rarely, easier to reduce costs.
The technical personnel also said: “is a kind of thin film solar energy efficient products, but also more easily with the perfect combination of building materials in the international market. Continuous tense silicon thin film solar cells, under the background of international pv market has become a new trend in the development of new and hot.”
At present, mainly including film solar cells silicon-based solar cells, the thin film solar cells cadmium tellurium, copper indium gallium selenium film solar cells, etc. With the first solar companies as a representative of the cadmium tellurium film solar cells technology were the most common.
In the film solar cells on the market, the leader is the United States, Japan and other countries of the enterprise. But some Chinese solar cell production enterprises in this new film solar cells and unwilling to lag behind.
On September 9th, located in heibei baoding tianwei the change of the listed company, the company announced subsidiary tianwei film will invest more than 30 million yuan, the construction of 15 million kilowatts of amorphous silicon thin film solar cells phase ii project.
More than two months ago, tianwei film of 465 million kilowatts of amorphous silicon thin film solar cell production line has been put into production, the initial photoelectric conversion efficiency at around 8%.
Besides, the immortal DE solar, tianwei suntech will also have such production or film solar cells line. However, these enterprises of production technology film solar cells are imported from abroad.
Thin film solar cells, but the prospect is not without risk.
China electronics materials industry association LiQingYan told the news of the science and technology and cost due to factors such as the next time, polycrystalline silicon solar battery will continue as the main industries.
“At present, film solar cells in the proportion of solar cell industry in China only 10%. The next 10 years to 20 years, film solar cells also won’t occupy the leading position of solar cells, because its technology is mature. He said: “some film solar cells, the efficiency of the silicon solar battery relatively poor many, have some good cost and high efficiency.
Three fluorinated nitrogen
Thin film solar cell industry in the future to beat the competition polycrystal silicon solar battery, still must face a environment problem: film solar cells in the production process of releasing three fluorinated nitrogen, considered a greenhouse gases.
In 2008, the university of California, irvine earth system science pilates MichaelPrather djoser (Michael) and his colleagues in the journal proceedings of the geography research papers issued three fluoride, says the greenhouse effect of nitrogen dioxide’s 17,000 times is. In the semiconductor, LCD panel and thin film solar cell production process, all three fluoride might release nitrogen.
Winfrey, told the news of the harp science, three fluorinated nitrogen significant greenhouse effect can exist in the atmosphere of 550 years of infrared ray absorbing ability is strong.
At the university of California at the Scripps research institute (sea ray overrepresented RayWeiss) and the research team also found that three fluoride concentrations of nitrogen in the air by 1978 0.02 / trillion rose to 2008 0.454 / trillion.
At present, although overrepresented produced by human activity in the greenhouse effect, carbon dioxide, accounted for 60% three fluorinated nitrogen accounted for only three fluoride 0.04%, but the proportion of nitrogen in May be exponentially.
He told the news of science: “we are monitoring results show that, the atmosphere of the three fluorinated nitrogen than expected high emissions from 4 to 5 times.”
At present, Kyoto only involves 6 kinds of gas, carbon dioxide and methane, nitric oxide, hydrogen fluorine carbon, the perfluorocarbon and six fluorinated sulfur. Winfrey and Suggestions, will be three overrepresented in fluorinated nitrogen also need to reduce the emissions of greenhouse gases.
Said: “we should overrepresented in three fluorinated nitrogen reduction of incentive mechanism.
The atmospheric composition observation LiuYu service center, said three fluorinated n the greenhouse effect than carbon dioxide, but really global atmosphere three fluorinated nitrogen content is not high.
Also noted that the three overrepresented fluorinated nitrogen emissions, it will not only be non-action worst greenhouse gases. Moreover, most of the use of clean technologies, whether film solar cells, wind generators or production process will accompany greenhouse gas emissions, so long as they use life sufficient to cover the greenhouse gas emissions, so these new technologies or useful.
He said: “the film for the use of solar panels for decades, more than life and they only need time can compensate for the production process of releasing greenhouse gases.
Sircana said, pilates semiconductor, LCD panel and thin film solar panels can consider alternative, reduce the production process of greenhouse gas emissions, is especially important, “must be fair appraisal”.