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Related Experiment Video

Updated: Feb 8, 2026

Flash Infrared Annealing for Perovskite Solar Cell Processing
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Competitive-binding buried interlayer for year-round reproducible perovskite solar cells.

Yansong Ge1,2, Weiwei Meng3, Zixi Yu2

  • 1School of Electronics and Electrical Engineering, and State Key Laboratory of New Textile Materials and Advanced Processing, Wuhan Textile University, Wuhan 430200, Hubei, People's Republic of China.

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|February 6, 2026
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Summary

Researchers developed a potassium dihydrogen phosphate interlayer to fix hidden defects in perovskite solar cells. This improves photovoltaic performance and stability by creating a homogenized buried interface.

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Area of Science:

  • Materials Science
  • Photovoltaics
  • Chemical Engineering

Background:

  • Posttreatment homogenization of perovskite solar cell surfaces is advanced.
  • Imperfections at the buried interface are difficult to remedy after film generation.

Purpose of the Study:

  • To address defects like residual lead iodide and voids at the buried interface.
  • To improve perovskite solar cell performance and stability.

Main Methods:

  • Introduced a potassium dihydrogen phosphate competitive-binding interlayer.
  • Utilized strong chemical interactions to reduce residual solvents at the buried interface.

Main Results:

  • Achieved a homogenized buried interface, enhancing perovskite film quality and charge extraction.
  • Resulted in year-round improvements in photovoltaic performance and reproducibility.
  • Achieved a champion power conversion efficiency (PCE) of 26.3% and maintained 97% of initial PCE after 1000 hours.

Conclusions:

  • The potassium dihydrogen phosphate interlayer effectively resolves buried interface issues in perovskite solar cells.
  • This approach leads to significant enhancements in device efficiency and long-term stability.