At the SNEC 18th (2025) International Photovoltaic Power Generation and Smart Energy Conference & Exhibition, LONGi made headlines with two significant technological advancements. The company unveiled its self-developed large-area (260.9 cm²) crystalline silicon–perovskite two-terminal tandem solar cell, which achieved a remarkable 33% conversion efficiency, certified by the U.S. National Renewable Energy Laboratory (NREL). This accomplishment sets a new global benchmark in solar technology. Concurrently, LONGi’s back-contact (BC) module surpassed 26% efficiency, both milestones documented in Version 66 of the Solar Cell Efficiency Tables, showcasing the ongoing progress in photovoltaic technology.
LONGi’s crystalline silicon–perovskite tandem solar cell not only reached a groundbreaking 33% efficiency on a 260.9 cm² area but also marked the world’s first achievement of this magnitude at a mass-producible scale, signaling a significant advancement toward reducing photovoltaic energy costs. Additionally, the back-contact (BC) modules achieved 26% efficiency, bringing crystalline silicon module performance closer to the 27% threshold.
As a leader in the photovoltaic industry, LONGi has been at the forefront of innovation, transitioning from popularizing monocrystalline technology to advancing perovskite and BC solar cells. This progress is supported by a comprehensive research and development ecosystem that spans materials, equipment, and manufacturing.
“LONGi’s innovation is rooted in a deep respect for technological fundamentals,” stated Li Zhenguo, Founder of LONGi, President of its Central R&D Institute, and the newly appointed CTO. “We are dedicated not only to our own breakthroughs but also to fostering collaborative innovation.”
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