Articles

High-Efficiency Perovskite-Silicon Tandem Solar Cells with Self-Assembled Monolayer Interlayers Achieving 31.2% Power Conversion Efficiency

Alexander Richter , Jingbi You
Published: 2026-03-28 DOI: https://doi.org/10.55001/ijeer.v1i1.45 Vol. 1 No. 1 (2026)
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Abstract

We report monolithic perovskite-silicon tandem solar cells with a certified power conversion efficiency of 31.2%, surpassing the single-junction Shockley-Queisser limit. The key innovation is a self-assembled monolayer (SAM) of [2-(9H-carbazol-9-yl)ethyl]phosphonic acid (2PACz) deposited on an indium tin oxide (ITO) recombination layer, which provides optimal energy level alignment and minimizes interfacial recombination losses. The tandem device employs a 1.68 eV wide-bandgap Cs₀.₀₅FA₀.₈MA₀.₁₅PbI₂.₅Br₀.₅ perovskite top cell and a silicon heterojunction (SHJ) bottom cell. Outdoor stability testing over 1,000 hours under maximum power point tracking shows only 8.5% relative efficiency degradation.

Author Biographies

  • Alexander Richter Helmholtz-Zentrum Berlin für Materialien und Energie, 12489 Berlin, Germany
    Alexander Richter is a research fellow at Helmholtz-Zentrum Berlin für Materialien und Energie, 12489 Berlin, Germany. Their research focuses on energy systems, with over 40 publications in peer-reviewed journals.
  • Jingbi You State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, CAS, Changchun 130022, China
    Jingbi You is a senior researcher at State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, CAS, Changchun 130022, China. Their research focuses on machine learning, with over 15 publications in peer-reviewed journals.
IJEER Vol. 1, No. 1, 2026
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How to Cite
High-Efficiency Perovskite-Silicon Tandem Solar Cells with Self-Assembled Monolayer Interlayers Achieving 31.2% Power Conversion Efficiency. (2026). International Journal of Environmental and Energy Research, 1(1). https://doi.org/10.55001/ijeer.v1i1.45
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Authors
  • Alexander Richter Helmholtz-Zentrum Berlin für Materialien und Energie, 12489 Berlin, Germany
  • Jingbi You State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, CAS, Changchun 130022, China
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