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Green Solution-Bathing Process for Efficient Large-Area Planar Perovskite Solar Cells
Yifei Zhang1, Yongguang Tu1,2, Xiaoyu Yang1
1State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Frontiers Science Center for Nano-optoelectronics & Collaborative Innovation Center of Quantum Matter, Peking University, Beijing 100871, China.
A green solution-bathing strategy using 2-pentanol and formamidinium chloride (FACl) enhances perovskite solar cell (PSC) performance. This method achieves high efficiency and improved film quality, paving the way for scalable, eco-friendly PSCs.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Perovskite solar cells (PSCs) require high efficiency, longevity, and scalability for practical use.
- Current fabrication methods face challenges in achieving large-area, high-performance devices.
Purpose of the Study:
- To develop a green solution-bathing strategy for fabricating high-performance, large-area perovskite solar cells.
- To improve perovskite film quality, including grain size, crystallinity, and defect density.
Main Methods:
- Utilized a green solution-bathing process with 2-pentanol as the solvent and formamidinium chloride (FACl) as the solute.
- Investigated the impact of this method on perovskite film morphology and crystal structure.
- Fabricated small-area (0.103 cm²) and large-area (1.00 cm²) PSCs.
Main Results:
- Achieved a champion power conversion efficiency (PCE) of 21.03% for small cells and over 18% for large cells.
- Demonstrated improved perovskite film characteristics: enlarged grain sizes, enhanced crystallinity, and reduced defect density.
- Successfully prepared a large-scale perovskite film (5 cm × 5 cm) with a mirror-like finish.
Conclusions:
- The green solution-bathing process offers a viable and environmentally friendly alternative to conventional methods for PSC fabrication.
- This approach facilitates the up-scaling of PSCs, promoting their commercial viability.
- The method enhances device performance and film quality, crucial for next-generation solar technologies.
