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Mobile WebSitePhotovoltaic technology, reducing costs is a strategic direction
Crystalline silicon photovoltaic technology dominates the market. Of all solar arrays in devices worldwide, approximately 87% consist of crystalline silicon. However, the current interest in crystalline silicon photovoltaic technology is too high, and it is necessary to reduce the thickness of the silicon wafer of the first generation photovoltaic cell-crystalline silicon photovoltaic cell from time to time. Although the average thickness of silicon wafers has changed from 300,350 micrometers to 150 micrometers in the past few years, it has not yet entered the market.
Compared to crystalline silicon cells, second-generation photovoltaic cells—thin film photovoltaic cells—are less efficient, with most conversion efficiencies ranging from 5% to 10%. In addition, thin-film solar cells are not stable enough, and the data deteriorates due to exposure to sunlight. But thin film solar cells require less raw materials than crystalline silicon cells and are less expensive. Yan Junhao predicts that in 2012, the proportion of crystalline silicon photovoltaic cell equipment will fall from the current 87% to 75%, while the remaining 25% will be occupied by film base.
Yan Junhao also mentioned the third generation of new concept solar cell technology - dye-sensitized solar cells (DSSCDSSC uses dye molecules to absorb incident light, which is cheaper than crystalline silicon cells, but the efficiency is lower than the former two, and there are also stability problems. Dr. Meng Qingbo from the Chinese Academy of Sciences pointed out that one of the major advantages of DSSC is that it is easier to produce. In China, researchers are investigating whether the lithium ion iodide used in DSSC can be replaced with cheaper aluminum iodide to further reduce costs.
Dr. Laurie Peter of the University of Bath in the United Kingdom, who participated in the first CS3 seminar, believes that chemists need to re-examine past work and adopt more appropriate information on whether the Earth can provide sufficient information to meet the needs of large-scale solar power generation. Substitute experiments on new materials for long-term, large-scale applications.
It has semiconducting properties and is an extremely important and excellent semiconductor material.
Polycrystalline silicon is a direct raw material for the production of single crystal silicon. It is the electronic information basic material for semiconductor devices such as artificial intelligence, automatic control, information processing and photoelectric conversion; it is called the "stone of microelectronics building".
At present, crystalline silicon materials (including polycrystalline silicon and single crystal silicon) are the most important photovoltaic materials, and their market share is over 90%, and it is still the mainstream material 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 of 7 companies in three countries including the United States, Japan and Germany, forming a technical blockade and market monopoly.
At present, the main traditional processes of polysilicon production in the world are: modified Siemens method, silane method and fluidized bed method. Among them, the production capacity of polysilicon produced by the modified Siemens process accounts for about 80% of the world's total production capacity, and the monopoly blockade of industrialization technology will not change in the short term.
