Chinese solar panel maker JinkoSolar said it has achieved an energy conversion efficiency of 34.76% for a perovskite-silicon tandem solar cell based on TOPCon n-type wafers.
The company said the results were certified by China’s National PV Metric & Testing Center (NPVM). In previous attempts, JinkoSolar achieved a cell efficiency of 34.22% for the same device configuration.
“This latest breakthrough is attributed to JinkoSolar’s systematic innovation in perovskite and tandem technologies. Key improvements include the company’s proprietary high-efficiency N-type TOPCon bottom cell, passivation of defects at the bottom of the perovskite, new perovskite crystallization techniques and optimized vertical charge transport strategies,” the manufacturer said in a statement, without providing further details.
Chinese manufacturer Longi holds the world record for the efficiency of perovskite tandem solar cells, achieving an efficiency of 34.85% in April 2025.
Last week, JinkoSolar also announced that it had set a new world record for the efficiency of n-type TOPCon solar cells, namely 27.79%. The performance was independently verified by the German Institute for Solar Energy Research Hamelin (ISFH).
The company said the new record was achieved by an ultra-thin tunnel layer of silicon oxide and doped polysilicon passivated contacts, which suppress carrier recombination. This was further supported by new passivation materials, reduced optical losses and improved metallization.
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