JinkoSolar announced it has reached a conversion efficiency of 33.24% of its n-type TOPCon-based perovskite tandem solar cell, as tested by the Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences.
The tandem solar cell employed Jinko’s n-type high-efficiency monocrystalline TOPCon solar cell as the bottom cell. This conversion efficiency for the perovskite/TOPCon tandem solar cell was achieved through various materials and technology innovations including ultra-thin poly-Si passivated contact technology, novel light-trapping technology, intermediate recombination layer with high light transmittance and high carrier mobility, and efficient surface passivation technology using hybrid materials. This achievement demonstrates the compatibility of TOPCon as a mainstream solar cell technology with the next-generation perovskite/silicon tandem cell technology, breaking the efficiency limit of single-junction silicon solar cell.
“This milestone breakthrough once again highlights JinkoSolar’s determination to continuously push the boundaries through strong technological innovation capabilities,” said Dr. Jin Hao, CTO of JinkoSolar. “It also lays a solid technical foundation for the company’s continuous development. We believe that, as we continue to deepen our scientific research and technology, we will contribute to building a greener and more sustainable new energy structure.”
LONGi reached 33.9% efficiency with its own silicon-perovskite tandem solar cell design in November 2023, although it was not TOPCon-specific.
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