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Surface Crystallization Modulation toward Highly-Oriented and Phase-Pure 2D Perovskite Solar Cells.

Bin Chen1, Ke Meng1, Zhi Qiao1

  • 1School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China.

Advanced Materials (Deerfield Beach, Fla.)
|February 8, 2024
PubMed
Summary

This study introduces a surface crystallization modulation technique to improve 2D perovskite films for efficient solar cells. The method enhances crystal orientation and phase purity, leading to record power conversion efficiency and improved stability.

Keywords:
2D perovskitecrystal orientationcrystallization modulationphase‐purestability

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Area of Science:

  • Materials Science
  • Renewable Energy

Background:

  • 2D perovskites show promise for stable and efficient photovoltaics.
  • Crystal orientation and phase purity issues limit 2D perovskite optoelectronic performance.

Purpose of the Study:

  • To develop high-quality 2D perovskite films with vertical crystal orientation and high phase purity.
  • To enhance the optoelectronic performance and stability of 2D perovskite solar cells.

Main Methods:

  • Surface crystallization modulation technique.
  • Regulating crystallization dynamics via solvent atmosphere control during film processing.
  • Fabricating 2D perovskite films with controlled vapor-liquid interface growth.

Main Results:

  • Achieved vertical crystal orientation and high phase purity in 2D perovskite films.
  • Fabricated solar cells with a record power conversion efficiency of 15.04% for 2D perovskites (n ≤ 3).
  • Demonstrated excellent thermal and humidity stability for the optimized 2D perovskite solar cells.

Conclusions:

  • Surface crystallization modulation is effective for producing high-quality 2D perovskite films.
  • Optimized 2D perovskite films enable record efficiencies and enhanced stability in solar cells.
  • This technique offers a pathway to advanced 2D perovskite photovoltaic devices.