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Shanghai jiaotong university solar controller wen-zhong shen: photovoltaic parity should rely on large wafers and thin wafers

Editor's note: solar energy research institute of Shanghai jiao tong university, professor, doctoral supervisor wen-zhong shen keynote speech put forward their crystalline silicon solar cell technology for the future development trend prediction: photovoltaic parity Internet should depend on 166 mm silicon wafers and 100 microns thin silicon wafer, is based on double batteries and components with high density, support is intelligent inverter with superior including the application of smart technology.

on January 7th, the 11th China ( Wuxi) International new energy conference and exhibition ( CREC2019) Kicked off. Summit in 2019 a new global energy industry in the afternoon, the main BBS site, the solar energy research institute of Shanghai jiao tong university, professor, doctoral supervisor wen-zhong shen speech as the theme, and put forward their crystalline silicon solar cell technology for the future development trend prediction. He noted that & other; Battery technology is the eternal theme in photovoltaic industry, I imagine photovoltaic parity on the Internet should be on 166 mm silicon wafers and 100 microns thin silicon wafer, is based on double batteries and components with high density, support is intelligent inverter with superior including the application of smart technology. ”

wen-zhong shen thinks, China solar energy network, crystal silicon has been the mainstream of the market, according to the present development situation, in the next decade will still have lasting vitality. He mentioned, through the test of time, a good photovoltaic products to meet three conditions: the battery efficiency to achieve more than 24%, even lower electronic cost to do under 25 cents, system stability more than 25 years or longer, this, crystal silicon can do.

in technological progress, crystalline silicon cells made great efforts. Wen-zhong shen mentioned, the development of the photovoltaic battery technology is dependent on the crystal silicon cell size and thickness changes. Rank from a semiconductor wafer size changes, now investment hot spot is 12 inches, this is the mainstream products in the world, share to a peak in 2022, but China's current mainstream in 8 inch wafer, the gap is larger. “ Can size scale applied to the entire link form a complete set of solar energy, including talent, technology, equipment suppliers, etc to form a complete set of all aspects to introduce products into the mature market. This aspect of the experience and lesson is we should think solar wafers. ” He concludes.

in the forecast for the future solar silicon cells, wen-zhong shen mentioned, silicon is the trend of The Times. Represented by longji 166 wafers fast development, the products after modification can be very good as long as the upgrade. Wen-zhong shen thinks, solar equipment, given that China probably has more than 130 gw capacity batteries and components, solar portal, so 166 in a long time will become the standard limit. 166 is the size of win-win cooperation, he hopes the coordinated development of the whole industry chain, through improving the comprehensive production of 166.

in addition to the large size of silicon wafer, chip development is also an important trend for the future. Wen-zhong shen thinks, is the biggest advantage of monocrystalline silicon wafer. He noted that the wafer of silicon wafers for the price of the components have an immediate effect of authors, if wafers per reduce 20 microns, the corresponding component price can be reduced 5 to 6 cents, huge space for development. For monocrystalline silicon slice, wen-zhong shen hope, China solar power network, the future can reach 100 microns, the silicon material with less, can reduce requirement for the quality of silicon, and even can be flexible, at the same time, the thickness of the silicon wafer thinning to the heterojunction battery chip is very good. In addition, he also stressed the double-sided PERC important role of the battery. He mentioned, there is no doubt that the PERC battery make wafer is possible. Double battery can do 100 microns and even thinner, low auxiliary materials production, transparent to both sides, electricity advantage will be more obvious.

talking about the future, he concludes, big wafer is the trend of The Times, hope the coordinated development of the whole industry can 166 M6 widespread application. At the same time, the chip is single crystal advantage, but it is not good. Also hope that the technology can rapid progress, especially 100 microns thin silicon wafer, can be aiming for.

the original title: Shanghai jiaotong university wen-zhong shen: photovoltaic parity Internet should rely on large wafers and thin silicon wafer

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