Chinese solar module maker JinkoSolar said it has achieved an energy conversion efficiency of 33.24% 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 achieved a cell efficiency of 32.33% for the same device configuration.
“This breakthrough in conversion efficiency for the perovskite/TOPCon tandem solar cell has been achieved through several materials and technological innovations, including ultra-thin poly-Si passivated contact technology, new light-trapping technology, an intermediate recombination layer with high light transmission and high carrier. mobility and efficient surface passivation technology using hybrid materials,” the manufacturer said, without providing additional technical details.
Chinese manufacturer Longi holds the world record for the efficiency of perovskite tandem solar cells, achieving an efficiency of 33.9% in November 2023. A few months earlier, 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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