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Enhancing Efficiency and Stability of Tin-Based Perovskite Solar Cells through A-Site Compositional Engineering
Yiran Zhang1, Shisheng Ge1, Chunping Pu1
1National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, School of Physics, Nanjing University, Nanjing 210093, P.R. China.
Nano Letters
|August 23, 2025
Summary
This study introduces a novel component-engineering strategy to enhance tin-based perovskite solar cells (TPSCs) without additives. This method improves crystallinity and stability, boosting TPSC efficiency and longevity.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Tin-based perovskite solar cells (TPSCs) show promise due to performance and environmental benefits.
- Small-molecule additives are common for enhancing TPSC performance but can cause degradation.
- Existing additive strategies face challenges with lattice deformation and desorption.
Purpose of the Study:
- To develop an intrinsic material design strategy for improving TPSC crystallinity and stability.
- To circumvent the limitations of conventional additive-based approaches in TPSC enhancement.
- To optimize the performance and operational lifespan of tin-based perovskite solar cells.
Main Methods:
- Developed a component-engineering crystallization modulation strategy.
- Accelerated precursor nucleation during spin-coating.
- Promoted two-dimensional phase formation during initial annealing.
Main Results:
- Achieved a marked efficiency enhancement in TPSCs from 10.22% to 13.49%.
- Demonstrated exceptional stability with negligible degradation after 5800 hours of N2 storage.
- Optimized crystal orientation and improved overall perovskite crystallinity.
Conclusions:
- Intrinsic material design offers a viable route to stabilize tin-based perovskites.
- Component-engineering bypasses the degradation issues associated with traditional additives.
- This approach significantly enhances TPSC efficiency and long-term operational stability.
