LONGi has added two further certified results to its Hybrid Interdigitated-Back-Contact (HIBC) platform, extending a steady run of efficiency records. The Institute for Solar Energy Research Hamelin (ISFH) in Germany certified a cell efficiency of 28.13 percent, while the National Laboratory of the Rockies (NLR) in the United States certified a module efficiency of 26.4 percent. The company says it has set 21 cell efficiency records since 2021.
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The work was carried out by LONGi's Central R&D Institute. The development centred on in-situ Patterned Edge Passivation (iPET) and Laser-Induced Crystallization modification (LIC), alongside changes to cell structure, materials and fabrication. The aim was to improve optical performance, interface passivation and charge transport, with an eye to manufacturable crystalline silicon.
LONGi says its HIBC-based EcoLife series reached 25 percent mass-production efficiency and topped TaiyangNews' April 2026 ranking of commercial modules. Back-contact technology sits at the centre of the company's silicon roadmap, and a significant share of annual capacity is already allocated to the architecture.
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Alongside HIBC, LONGi is also advancing its new HPBC 2.0 platform, which it says holds a module efficiency record of 25.4 percent. The 28.13 percent HIBC cell is one of two world records set in 2025, the other a 34.85 percent crystalline silicon-perovskite tandem cell, certified by NREL in the United States. (TF)
