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LONGi resets world record on HJT cell conversion efficiency of 26.30%

Chinese solar PV cell maker Longi resets the world record again on the silicon-based heterojunction (HJT) solar cell with the conversion efficiency of 26.30%. The achievement was tested by the Institute for Solar Energy Research GmbH (ISFH), which is another breakthrough after the recent accomplishment of reaching conversion efficiency of 25.82% in this week.


The filling factor (FF) of the certified cell reached the highest in the world for the first time, breaking 86% and reaching 86.59%. Through the unremitting efforts of Longi’s R&D team, the newly developed process can effectively reduce the contact resistance of the interface, effectively improve FF, and further improve the current density of the cell. The current density has reached 40.49mA/cm2 on the M6 full area 9BB cell.

In June of this year, LONGi set a new world record for HJT cell conversion efficiency at 25.26%. Now, just four months later, LONGi has done it again. The research and development of HJT technology is an important indicator of LONGi’s efforts of leading the global energy transformation with technological innovation.

Based on the industrialization of new high-efficiency cell technology, LONGi’s R&D center insists on independent originality and promotes the technological advancement of the photovoltaic industry. The breakthrough of the HJT cell efficiency record this time shows the outstanding technical strength of the LONGi technology research and development team. With a high proportion of R&D investment (not less than 5% of revenue per year), LONGi has maintained a global leadership in the research and development of various advanced cutting-edge cell technologies.

Since its establishment, LONGi has always regarded technological innovation as the primary driver of its development. In January 2019, the conversion efficiency of its monocrystalline bifacial PERC cell reached 24.06% and this record still stands. In the field of N-type TOPCon cells, LONGi announced in June that its conversion efficiency had achieved a world record of 25.21%. In the field of P-type TOPCon cells, LONGi achieved a world record conversion efficiency of 25.19% in July this year, further demonstrating LONGi’s technical prowess.

Innovation is the heart and soul of LONGi’s product strategy. LONGi stated that in the future it will continue to increase technological innovation, create greater value for the market with more high-quality, reliable and efficient products, and further contribute to the realization of the China’s dual-carbon goal.


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