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Updated: May 10, 2025
Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
Published on: February 27, 2017
Stabilize Perovskite Precursors and Inhibit Intermediates for High Performing Perovskite Solar Cells
Zhiqian Yang1,2, Aiqing Sun1,2, Yingke Ren3
1Key Laboratory of Photovoltaic and Energy Conservation Materials, CAS, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui, 230031, China.
Researchers improved perovskite solar cell (PSC) efficiency and stability by adding saccharin sodium to the precursor. This additive prevents precursor degradation and promotes high-quality film formation, boosting power conversion efficiency to 24.8%.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Perovskite solar cells (PSCs) show promise but face challenges with precursor stability and film quality.
- Degraded precursors negatively impact PSC crystallinity, reproducibility, and long-term stability.
Purpose of the Study:
- To enhance the stability of perovskite precursors and improve the quality of perovskite films for PSCs.
- To investigate the role of saccharin sodium (SacS) in mitigating precursor degradation and optimizing film growth.
Main Methods:
- Introduction of saccharin sodium (SacS) into the lead(II) iodide (PbI2) perovskite precursor.
- Analysis of SacS interaction with PbI2, focusing on its sulfonyl and carbonyl groups.
- Characterization of perovskite film morphology, crystallinity, and orientation.
Main Results:
- SacS formed a stable complex with PbI2, preventing precursor degradation and aggregation.
- The additive suppressed unfavorable intermediate phases during film formation.
- High-quality perovskite films with vertical orientation were achieved, leading to improved device performance.
Conclusions:
- Saccharin sodium is an effective additive for stabilizing perovskite precursors and enhancing PSC performance.
- This method significantly improves power conversion efficiency (PCE) to 24.8% and bolsters device stability.
- The findings offer a promising strategy for developing more stable and efficient perovskite solar cells.
