Green Energy Technology Company LONGi, on Friday announced a new world record efficiency of 30.1% for its commercial M6 size wafer-level silicon-perovskite tandem solar cell on June 19, 2024, at the Intersolar Europe event in Munich, Germany. The efficiency was independently certified by the Fraunhofer Institute for Solar Energy (Fraunhofer ISE).
This achievement comes shortly after LONGi’s previous record of 34.6% tandem solar cell efficiency at the 2024 SNEC EXPO in Shanghai. The new record also surpasses the former world record of 28.6% wafer-level tandem solar cell efficiency set in May 2023, marking an absolute efficiency improvement of 1.5%.
“While continuously exploring the efficiency limits of tandem solar cells, LONGi’s R&D team started research on mass production technology for tandem solar cells in October 2023, and in just six months, they overcame two key challenges: the preparation of large-area perovskite films in air and ultra-low-temperature metallization,” said Dr He Bo, R&D Director of LONGi Central R&D Institute.
The theoretical limit for monocrystalline silicon-perovskite tandem solar cells is 43%, positioning them as the future of ultra-high-efficiency solar cells. This latest achievement reinforces LONGi’s leadership in single-junction and tandem solar cell technologies.
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