LONGi Green Energy Technology has announced a new world record efficiency of 30.1% for a commercial M6 size wafer-level silicon-perovskite tandem solar cell at the 2024 Intersolar Europe event in Germany. This new record comes less than a week after LONGi announced a new world record of 34.6% tandem solar cell efficiency at the 2024 SNEC EXPO in Shanghai, and it also breaks the previous world record of 28.6% wafer-level tandem solar cell efficiency on M4 commercial size wafers in May 2023.
The commercial M6 size wafer-level silicon-perovskite tandem solar cell was independently certified by the Fraunhofer Institute for Solar Energy (Fraunhofer ISE) in Germany.
Dr. He Bo, R&D Director of LONGi Central R&D Institute, said at the launch ceremony that the new world record efficiencies achieved by LONGi represent not only a significant advancement in pushing the efficiency limits of silicon-perovskite tandem cell prototypes but also a milestone in the commercial viability of this technology, marking a breakthrough by LONGi's team in its development.
Dr. He Bo said: “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.”
