LONGi announces a new world record efficiency of 30.1% for commercial M6-size wafer-level silicon-perovskite tandem solar cells.

LONGi Green Energy Technology Co., Ltd. (LONGi), a global leader in solar technology, officially announced a new world record efficiency of 30.1% for its commercial M6-size wafer-level silicon-perovskite tandem solar cells on June 19, 2024, at the InterSolar Europe in Munich, Germany. This record, independently certified by the Fraunhofer Institute for Solar Energy (Fraunhofer ISE) in Germany, signifies a significant leap in photovoltaic conversion efficiencies.

This achievement follows closely on the heels of LONGi’s recent world record of 34.6% tandem solar cell efficiency announced at the 2024 SNEC EXPO in Shanghai, surpassing the previous record of 28.6% for M4 commercial size wafers set in May 2023.

At the launch ceremony, Dr. He Bo, R&D Director of LONGi Central R&D Institute, highlighted that this new efficiency record represents not only a technological advancement but also a milestone in the commercial viability of silicon-perovskite tandem cells. He noted that the R&D team began focusing on mass production technology for tandem solar cells in October 2023, overcoming challenges related to large-area perovskite film preparation and ultra-low-temperature metallization in just six months.

Achieving over 30% efficiency for the first time on commercial-sized silicon-perovskite tandem solar cell devices showcases a significant improvement over LONGi’s previous record of 27.3%, boosting confidence and expectations within the global photovoltaic industry.

With a theoretical efficiency limit of 43%, monocrystalline silicon-perovskite tandem solar cells are poised to become the next generation of ultra-high efficiency solar cells. LONGi’s dual-record achievements redefine the efficiency limits of two-terminal tandem cells and mark a critical step towards the industrialization of tandem solar cells.

LONGi’s Central R&D Institute, with a robust team of over 5,000 researchers, continues to lead advancements in both monocrystalline silicon single-junction and tandem solar cells. Since its listing in 2012, LONGi has invested over 30 billion yuan in R&D, securing 2,879 authorized patents, underscoring its commitment to technological innovation and leadership in the photovoltaic industry.