AI-Optimized Perovskite-Silicon Tandem Cell Efficiency Breaks 34.2%: Solar Efficiency Ceiling Rises Again

LONGi Green Energy announced on February 25 that its perovskite-silicon tandem solar cell, developed in collaboration with Oxford University's photovoltaics laboratory, has achieved an NREL-certified power conversion efficiency of 34.2%, setting a new world record for this cell structure.

The breakthrough's key was an AI materials screening platform that evaluated 2 million candidate passivation materials through molecular dynamics simulation and machine learning prediction, finding the optimal interface passivation solution in just 3 weeks — a process that traditional trial-and-error methods might take years to complete.

LONGi indicated that 34.2% efficiency still has room from the theoretical limit of approximately 43%, and the company plans to push tandem cell efficiency to 36% by 2030. The first commercial products are expected by late 2029, initially priced at approximately 1.5 times that of monocrystalline silicon cells.