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Multifunctionally Reusing Waste Solder to Prepare Highly Efficient Sn-Pb Perovskite Solar Cells
Chang Chen1, Chenghao Duan1, Feilin Zou1
1School of Environment and Energy, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou, 510000, China.
Small (Weinheim an Der Bergstrasse, Germany)
|February 28, 2024
Summary
Recycling tin-lead solder waste into high-purity tin-iodide/lead-iodide components significantly boosts perovskite solar cell (PSC) efficiency and stability. This sustainable method enhances PSC performance while reducing costs.
Area of Science:
- Materials Science
- Renewable Energy
- Chemical Engineering
Background:
- Commercialization of perovskite solar cells (PSCs) requires cost-effective and pure precursor materials.
- Utilizing waste materials for perovskite component synthesis presents challenges in product purity and tin oxidation.
- Developing sustainable methods for producing tin-iodide (SnI2) and lead-iodide (PbI2) is crucial for advancing PSC technology.
Purpose of the Study:
- To develop a simple, one-step process for converting waste tin-lead (Sn-Pb) solder into high-purity SnI2/PbI2.
- To apply the synthesized SnI2/PbI2 in PSCs to evaluate their performance and added value.
- To investigate the role of waste Sn-Pb solder as a reducing agent in the perovskite precursor fabrication.
Main Methods:
- A one-step synthetic process was employed to convert waste Sn-Pb solder into SnI2/PbI2.
- The synthesized SnI2/PbI2 was used in the fabrication of perovskite solar cells.
- Waste Sn-Pb solder was utilized as a reducing agent to mitigate Sn4+ and deep trap states in the perovskite precursor.
Main Results:
- The target PSCs fabricated with recycled materials achieved a power conversion efficiency of 21.04%, surpassing commercial SnI2/PbI2 devices (20.10%).
- The PSCs demonstrated enhanced operational stability, retaining 80% of their initial efficiency after 800 hours of continuous illumination.
- The recycling strategy achieved a 90.12% recovery rate for Sn-Pb waste solder, yielding lab-grade purity (>99.8%) for SnI2/PbI2, reducing active layer costs by 39.81%.
Conclusions:
- The developed method offers a sustainable and cost-effective route for producing high-quality perovskite precursor materials from waste solder.
- This approach significantly improves the efficiency and long-term stability of perovskite solar cells.
- The findings highlight the potential of waste valorization in advancing the commercial viability of perovskite solar technology.
