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Flash Infrared Annealing for Perovskite Solar Cell Processing
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Surface-Dominant Fluorinated Structures in Sn-Based Perovskite Solar Cells.
Hyungsu Jang1, Taehee Song2, Jina Roe2
1Graduate School of Carbon Neutrality, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea.
ACS Applied Materials & Interfaces
|June 18, 2025
Summary
Adding fluorinated organic materials to tin-based perovskites improves solar cell efficiency and stability. This study shows direct precursor incorporation enhances surface passivation, reducing charge recombination for better performance in perovskite solar cells.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Two-dimensional (2D) structures enhance tin-based perovskites.
- Fluorinated organic materials improve device performance, but mechanisms are unclear.
Purpose of the Study:
- Investigate the mechanism of fluorinated organic materials in tin-based perovskites.
- Enhance efficiency and stability of perovskite solar cells (PeSCs).
Main Methods:
- Incorporated trifluoromethyl-substituted organic halide (F3-BAI) into perovskite precursor.
- Analyzed surface passivation, charge recombination, and charge extraction.
- Fabricated and tested perovskite solar cells (PeSCs).
Main Results:
- F3-BAI localized at the surface, providing passivation.
- Reduced charge recombination and enhanced charge extraction.
- Achieved 12.92% efficiency, up from 10.01% in control devices.
- Improved stability in humid environments and ambient air due to hydrophobicity.
Conclusions:
- Direct precursor incorporation of F3-BAI is an effective strategy for Sn-based PeSCs.
- Surface passivation by F3-BAI enhances device performance and stability.
- Fluorinated materials offer a promising route for stable and efficient perovskite solar cells.
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