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Related Experiment Video

Updated: May 8, 2025

Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
11:38

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High-Efficiency Large-Area Perovskite Solar Cells via a Multifunctional Crystallization Regulating Passivation

Junjie Zhou1, Jiaying Lv2, Liguo Tan1

  • 1State Key Laboratory of Power System Operation and Control, Department of Electrical Engineering, Tsinghua University, Beijing, 100084, China.

Advanced Materials (Deerfield Beach, Fla.)
|April 11, 2025
PubMed
Summary

A novel chlorine-substituted aromatic polycyclic derivative (BNCl) enhances perovskite solar cell (PSC) performance by improving film morphology and reducing defects. This leads to higher efficiency and stability in PSCs and minimodules.

Keywords:
crystallization regulationlarge areapassivationperovskite solar cells

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Area of Science:

  • Materials Science
  • Renewable Energy

Background:

  • Film morphology and defect density critically impact perovskite solar cell (PSC) efficiency and stability.
  • Controlling perovskite crystallization and passivating defects are key challenges in PSC development.

Purpose of the Study:

  • To investigate the use of a chlorine-substituted aromatic polycyclic derivative (BNCl) for regulating perovskite crystallization and passivating defects.
  • To enhance charge transfer and improve the overall performance and stability of PSCs.

Main Methods:

  • Synthesis and characterization of the BNCl molecule.
  • Incorporation of BNCl into perovskite films to control crystallization and passivate surfaces/interfaces.
  • Fabrication and testing of PSCs and minimodules with BNCl treatment.
  • Long-term stability testing under operational conditions (MPP tracking).

Main Results:

  • BNCl effectively regulates perovskite crystallization and passivates grain boundaries and surfaces.
  • BNCl facilitates hole transport at the HTL/perovskite interface, improving charge transfer.
  • Certified power conversion efficiencies (PCEs) of 25.04% (1 cm²) and 22.81% (12 cm²) were achieved.
  • Devices maintained 80% of initial efficiency after 2500 hours of stability testing.

Conclusions:

  • BNCl is a promising additive for enhancing PSC efficiency and stability.
  • The study demonstrates a viable strategy for improving perovskite film quality and device performance.