Chinese solar module maker JinkoSolar said it has achieved an energy conversion efficiency of 33.84% for a perovskite-silicon tandem solar cell based on n-type wafers.
The company said the results were certified by the Shanghai Institute of Microsystem and Information Technology under the CAS. In previous attempts, JinkoSolar has a cell efficiency of 33.24% for the same device configuration.
“The record-breaking perovskite tandem solar cell uses that of JinkoSolar N-type high-efficiency monocrystalline TOPCon solar cell as the bottom cell, enhanced by significant improvements in several key technologies,” the manufacturer said. “Innovations such as full-surface passivated contact technology, perovskite interfacial defect passivation technology and bulk defect passivation technology have contributed to the improved efficiency of the perovskite/TOPCon tandem cell.”
Chinese manufacturer Longi holds the world record for the efficiency of perovskite tandem solar cells, achieving an efficiency of 34.6% in September 2024. Previously, Saudi Arabia’s King Abdullah University of Science and Technology (KAUST) announced a perovskite-silicon tandem device with an efficiency of 33.7%. .
Researchers from Germany’s Fraunhofer Institute for Solar Energy Systems (Fraunhofer ISE) recently said that the The practical energy conversion efficiency potential of perovskite-silicon tandem solar cells can reach 39.5%.
Researchers said exceeding this efficiency threshold will require a change in cell architecture, replacing buckminsterfullerene (C60) with a more transparent electron transport layer and finding more transparent alternatives to indium tin oxide (ITO) layers.
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