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Immobilizing Lead and Healing Surface Defects via Perfluorinated Tertiary Amine Molecules Enables High-Performance
Zuolin Zhang1, Jike Ding1, Hao Liu1
1State Key Lab of Intelligent Power Distribution Equipment and System, School of Materials Science and Engineering, Hebei University of Technology, Tianjin, 300401, China.
Advanced Materials (Deerfield Beach, Fla.)
|July 14, 2025
Summary
A new perfluorination strategy effectively immobilizes lead and passivates surface defects in perovskite solar cells (PSCs). This breakthrough enhances efficiency and stability, paving the way for sustainable photovoltaic technology.
Area of Science:
- Materials Science
- Photovoltaics
- Chemistry
Background:
- Perovskite solar cells (PSCs) face challenges with intrinsic instability and surface defects.
- Lead leakage from PSCs raises environmental concerns, limiting commercialization.
- Developing stable and eco-friendly PSCs is crucial for renewable energy.
Purpose of the Study:
- To introduce a universal perfluorination strategy for defect passivation and lead immobilization in inverted PSCs.
- To improve the efficiency and long-term stability of perovskite solar cells.
- To address the environmental concerns associated with lead in PSCs.
Main Methods:
- A perfluorination strategy using perfluorotriethylamine (PFTEA) was employed.
- PFTEA forms a complex with PbI2, enhancing defect passivation and suppressing lead leakage.
- Fabrication of inverted PSCs using vacuum flash evaporation technique.
Main Results:
- PFTEA-modulated inverted PSCs achieved a certified stabilized power conversion efficiency (PCE) of 26.65%.
- The devices demonstrated suppressed lead leakage and reduced nonradiative recombination.
- The modified PSCs retained 92% of their initial PCE after 1000 hours of continuous operation.
Conclusions:
- The perfluorination strategy offers a simple and effective method for advancing inverted photovoltaic technology.
- This approach significantly improves the efficiency and stability of PSCs.
- The strategy contributes to the sustainable development of solar energy by addressing lead leakage.
