In 2011, the monocrystalline monocrystalline solar wafers appeared to be inferior to expectations in 2012. Recently, many Taiwanese solar wafer factories chose to stop supplying and wait and see, mainly because the cost is difficult to control, and the efficiency distribution Uniformity is not as expected, and some prospective investors also choose to suspend their pace. Taiwanese solar photovoltaic industry pointed out that due to the above factors, Taiwan's solar-powered monocrystalline silicon wafers were forced to leave the bench and replace them with polycrystalline high-efficiency silicon wafers. Affected by the continuous improvement of the conversion efficiency requirements of solar photovoltaic cells by the client, the monocrystalline silicon wafers that were prosperous in the past two years in 2011 showed the situation of sitting on the bench in the first quarter of 2012, especially the Taiwan wafer market with little supply. Now, it is almost close to the situation of no supply and no production. The solar wafer factory said that the main reason for switching from a small amount of trial production to a stoppage is to consider the cost and efficiency distribution of single crystals. After the single crystal grows into a crystal column, the efficiency distribution is mainly divided into two kinds, that is, 9 aliquots located at the core position, which are highly efficient, and 16 aliquots which are relatively inefficient at the periphery, but the efficiency of the core efficient part is still not Concentration, can not be effective, although the peripheral inefficiency claims to be higher than the general polycrystalline or equivalent to polycrystalline, but due to insufficient process stability, some may be worse than the general polycrystalline, and the production cost is relatively polycrystalline. The efficiency and quality distribution can not be effectively controlled, and the silicon wafer factory is very troublesome, because most silicon wafers do not have photovoltaic cells and photovoltaic modules to the estuary of the system. In the case of not buying the market, the most direct method is recycling. System, but for silicon, the cost is constantly increasing. If the above-mentioned efficiency distribution unevenness and process yield are removed, the production cost of the single crystal is also a big test. If the high-efficiency single crystal distributed in the core is used, the cost per piece will increase by about 0.25~0.30 US dollars, but the price It is only comparable to general high-efficiency polycrystalline silicon wafers, and the added cost of high-efficiency polycrystalline silicon wafers is very limited. Monocrystalline single crystals allow operators to operate at almost a loss. In the efficiency of the first round of the solar cell of Taiwanese solar wafers, they were forced to leave the bench and return to the cold bench. Instead, they were the mainstream high-efficiency polycrystalline silicon wafers. The solar energy industry said that although the single crystal is not produced at present, it does not mean that it should withdraw from the market. It is only to re-investigate the above problems. Therefore, the explosive power of the single crystal will be later than originally expected, if the cost and efficiency cannot be made. In line with market requirements, it is difficult to be competitive in the market. In addition, the current problem of single crystals does not mean that the monocrystalline single crystal will not have the opportunity to become a silicon wafer to replace polysilicon in the future, especially its efficiency is between polycrystalline and single crystal, which is the most opportunity for polycrystalline to break through the efficiency bottleneck. One of the technologies, if someone can successfully break through the cost and efficiency problems in the future, there is still considerable competitiveness. Based on this consideration, the investment in research and development can not be interrupted. Taiwan's solar wafer factory includes Sino-US silicon crystal, green energy, Danone, Xujing, Yucheng, etc. The Taiwanese plant has a relatively large investment in the single crystal, and the supply is relatively limited. In addition to self-production, there are also equipment-made capabilities.
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