Key Findings
LONGi Green Energy has announced a substantial investment of approximately 204 million RMB (about $28 million USD) to establish a 100MW pilot production line for high-efficiency silicon-perovskite tandem solar cells in the Xixian New Area, Shaanxi Province, China. This strategic move aims to accelerate the commercialization of tandem cell technology, building upon the company’s achievement of a new world-record conversion efficiency of 35.5% for silicon-perovskite tandem cells in July 2026. This project signifies a critical step in translating laboratory breakthroughs into scalable manufacturing, positioning LONGi at the forefront of the next-generation photovoltaic market.
Technical Details
The new pilot line will be integrated into LONGi’s existing research facilities, focusing on advancing both the R&D and pilot-scale testing of these advanced tandem cells. Key equipment, including state-of-the-art perovskite thin-film deposition systems, will be installed to enable precise and high-quality fabrication of the perovskite layers. Perovskite-silicon tandem cells leverage the broad spectral absorption capabilities of perovskites—which efficiently convert high-energy photons—with the robust performance of silicon at lower energies. This synergistic approach allows for power conversion efficiencies that surpass the theoretical limits of single-junction silicon cells. LONGi’s 35.5% efficiency record highlights the immense potential of this architecture to deliver significantly more power output per unit area, directly impacting the levelized cost of electricity (LCOE).
Background and Industry Context
As conventional silicon solar cells approach their theoretical efficiency limits, perovskite technology has emerged as a leading candidate for future photovoltaic innovation. Tandem configurations, in particular, combine the strengths of both materials, continuously breaking efficiency records. LONGi, a global leader in solar PV manufacturing, making such a significant investment in perovskite technology signals a strong industry shift towards adopting and scaling these advanced materials. This commitment reflects a broader trend within China, supported by government initiatives to foster domestic leadership in renewable energy technologies and enhance the nation’s energy independence. The move from research to pilot production is a pivotal moment for the perovskite industry as a whole.
Future Outlook
The establishment of a 100MW pilot production line is a crucial step towards the mass commercialization of perovskite-silicon tandem solar cells. This facility will enable comprehensive optimization of manufacturing processes, cost reduction strategies, and rigorous reliability testing under real-world conditions. Successful scaling here is expected to pave the way for a broader market introduction within the next few years. LONGi’s investment is set to drive the availability of more efficient and potentially lower-cost solar solutions for a diverse range of applications, from residential rooftops to utility-scale power plants. This advancement will play a significant role in accelerating the global transition to clean energy, demonstrating the tangible progress in perovskite technology from an academic curiosity to an industrial reality.
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