On March 28, LONGi officially released TereBrain's silicon wafer products, and announced that it had completed a large number of R&D and system patent layouts, and was ready for full-scale production.
▲LONGi Terui silicon wafer was officially released
LONGi's silicon wafer products are the result of three years of painstaking research and development by hundreds of LONGi technical engineers, achieving a breakthrough in silicon wafer innovation that has not been substantially innovated in the past decade, and becoming the vane of technological development in the field of silicon wafers.
In the past ten years, major breakthroughs have been made in the technology and cost of photovoltaic power generation, photovoltaic power generation has become the world's fastest growing renewable energy, and the global photovoltaic has also entered the "terawatt era". Li Zhenguo, founder and president of LONGi Green Energy, said that the rapid development of the photovoltaic industry essentially lies in the continuous reduction of the cost of electricity. Reducing costs and improving power generation efficiency are the "first principles" of the photovoltaic industry.
Thanks to the rapid development of the photovoltaic industry, the development of photovoltaic silicon wafers is also relatively rapid. Silicon wafers are an indispensable substrate in cell development, and their quality directly determines the yield of downstream cells and the conversion efficiency of cells. However, in recent years, with the continuous improvement of silicon wafer production technology, the performance of silicon wafers has been improved more and more slowly, and the homogenization of silicon wafer products has become more and more obvious.
However, LONGi still insists on continuous research and development to further improve the performance of silicon wafers to meet the demand for high-quality silicon wafers for today's high-efficiency cells and help customers create maximum value.
According to Wang Yichun, Director of Product R&D of the R&D Center of LONGi Wafer Division, LONGi Terui silicon wafers have three significant advantages: full platform support, high resistance concentration and good impurity absorption effect. In addition, as a new type of silicon wafer, LONGi Terui silicon wafer products have more potential advantages waiting to be verified.
▲LONGi Terui silicon wafers
As a series of products, LONGi Tereck silicon wafers cover a variety of subdivided product portfolios, which can support a variety of battery routes, covering the mainstream high-efficiency cells in the current market - HBC, TBC, HJT, TOPCon, etc., which can simultaneously provide a variety of mainstream sizes and specifications required by the market, and can also meet the different thickness needs of customers.
The longer the conventional silicon rod, the greater the difference in head and tail resistivity. The long-held ideal in the monocrystalline field is longer silicon ingots and more concentrated resistance distribution. LONGi TerRex silicon wafers can achieve consistent axial resistance distribution, without the need to shorten the rod length that should be prepared by RCZ (repetitive feeding straight-pull single crystal), and can reduce the resistivity ratio of the output rod head to tail from 3 times to less than 1.5 times under the condition of consistent rod length, so as to achieve a relatively more concentrated distribution of cell efficiency, more high-efficiency cells, more high-quality products, and improve the difference between light and dark chips at the module end.
In addition, metal impurities in LONGi Terre's silicon wafers are easier to absorb, which has more room for efficiency improvement than conventional products. With the optimization of the impurity absorption process, the greater the impurity absorption gain potential, the greater the potential for improving the efficiency of the cell end.
In addition to the above-mentioned advantages in electrical performance, LONGi Terui silicon wafers also have stronger mechanical properties. After testing, the bending strength of LONGi Tererui silicon wafers can be increased by 16% compared with conventional products, and the fracture resistance is stronger, which is conducive to thinning and is expected to reduce the fragmentation rate in the manufacturing process.
▲LONGi Terui silicon wafers
Monocrystalline silicon wafers have always been LONGi's traditional advantageous products, ranking first in the world in terms of shipments for nine consecutive years. In recent years, the silicon wafer sector has undergone the upgrading of monocrystalline, large-size and thin-slicing, and LONGi has participated in every technological change.
For a long time, LONGi's Wafer Division has always adhered to the principle of putting customers first, insisting on leading standards, reliable quality, and excellent product and service experience, and winning the trust of customers. According to Hao Kai, President of LONGi's Wafer Division, LONGi's wafer customers have a saying: "There are two kinds of silicon wafers in the photovoltaic industry, one is LONGi wafers and the other is other wafers. ”
However, LONGi was not satisfied with the praise of customers for "LONGi silicon wafers", and insisted on the pursuit of excellence in product performance and excellence. Li Zhenguo said: "We will continue to adhere to the leadership of science and technology, innovation-driven, concentrate resources, continue to deepen in the photovoltaic field, and continue to launch more efficient and reliable products to help build new photovoltaic productivity." ”
Text丨Zhong Xinyuan