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Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films
Published on: September 8, 2017
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Combined Vacuum Evaporation and Solution Process for High-Efficiency Large-Area Perovskite Solar Cells with
Liguo Tan1, Junjie Zhou1, Xing Zhao1
1State Key Laboratory of Power System, Department of Electrical Engineering, Tsinghua University, Beijing, 100084, P. R. China.
Advanced Materials (Deerfield Beach, Fla.)
|January 22, 2023
Summary
Researchers developed a hybrid perovskite solar cell fabrication method combining vacuum evaporation and solution processing. This approach enables reproducible, large-area perovskite film production for efficient and stable perovskite solar cells (PSCs).
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Organic-inorganic hybrid perovskites show high performance in perovskite solar cells (PSCs).
- Reproducible, large-area fabrication of perovskite films is challenging due to complex precursor solution chemistry.
- Vacuum processing is suitable for large-area films but difficult for hybrid perovskites due to volatile organic ammonium halides.
Purpose of the Study:
- To develop a reproducible method for fabricating large-area perovskite films for perovskite solar cells.
- To overcome the challenges of vacuum processing hybrid perovskites.
- To achieve high power conversion efficiencies in large-area perovskite solar cells and minimodules.
Main Methods:
- Combined vacuum evaporation of lead iodide with solution processing of organic ammonium halide.
- Fabricated large-area, homogeneous perovskite films with large grains.
- Fabricated perovskite solar cells (PSCs) and minimodules for performance and stability testing.
Main Results:
- Achieved power conversion efficiencies (PCE) of 24.3% (small area) and 24.0% (large area).
- Demonstrated a 20.0% PCE for a 16 cm² minimodule.
- Maintained 90% of initial efficiency after 1000 hours of 1-sun operation.
Conclusions:
- The hybrid vacuum/solution processing method enables reproducible fabrication of high-quality, large-area perovskite films.
- This approach prevents environmental effects on lead halide formation, ensuring film quality.
- The method offers a promising pathway for the large-scale manufacturing of perovskite optoelectronics.
