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Flash Infrared Annealing for Perovskite Solar Cell Processing
Published on: February 3, 2021
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Precursor engineering for efficient and stable perovskite solar cells
Fuyuan Luan1,2,3, Haiyan Li2, Shuiping Gong2
1School of Energy and Materials, Shanghai Polytechnic University, Shanghai 201209, People's Republic of China.
Nanotechnology
|November 2, 2022
Summary
This study optimizes perovskite solar cells by adjusting precursor solution concentrations to eliminate excess lead iodide (PbI2). This precursor engineering enhances both efficiency and long-term stability in photovoltaic devices.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Two-step spin coating for perovskite films offers good morphology and reproducibility.
- Excessive lead iodide (PbI2) in perovskite films can improve efficiency but compromises long-term stability.
- PbI2 at grain boundaries is linked to perovskite film decomposition and device degradation.
Purpose of the Study:
- To enhance perovskite solar cell efficiency and stability through precursor engineering.
- To optimize the perovskite light-absorbing layer by controlling PbI2 conversion.
- To achieve high-performance perovskite solar cells by eliminating excessive PbI2 residue.
Main Methods:
- Utilized precursor engineering in the two-step spin coating method.
- Adjusted the concentration of organic salts (AX) in the precursor solution.
- Optimized the perovskite light-absorbing layer for complete PbI2 conversion.
Main Results:
- Achieved complete conversion of PbI2 into perovskite without excessive AX residue.
- Significantly improved both efficiency and stability of perovskite solar cells.
- Developed a planar perovskite solar cell with a 21.26% power conversion efficiency (PCE).
Conclusions:
- Precursor engineering effectively eliminates excessive PbI2, enhancing perovskite solar cell performance.
- Optimized perovskite films exhibit improved stability, retaining 90% PCE after 300h storage and 76% after 300h illumination.
- This approach offers a viable strategy for developing highly efficient and stable perovskite photovoltaic devices.
