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Phase-selective redissolution enabling phase-pure 2D/3D perovskite solar cells
Ke Guo1, Guiran Gao1, Mengxiao Hu1
1State Key Laboratory of Flexible Electronics (LoFE) & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, P. R. China. iamgbwu@njupt.edu.cn.
Chemical Communications (Cambridge, England)
|October 31, 2025
Summary
Researchers developed a new method to create stable perovskite solar cells. This technique enhances efficiency and durability by precisely controlling material phases, leading to improved performance.
Area of Science:
- Materials Science
- Solid-State Chemistry
- Photovoltaics
Background:
- 2D perovskites often suffer from mixed-phase issues, hindering device performance.
- Controlling phase purity is crucial for efficient and stable perovskite solar cells.
Purpose of the Study:
- To develop a phase-selective redissolution strategy for creating pure 2D/3D heterostructures.
- To overcome intrinsic multiphase problems in 2D perovskites.
- To improve defect management in perovskite materials.
Main Methods:
- Phase-selective redissolution of MA-based 2D perovskites.
- Formation of FA-based 2D/3D heterostructures.
- Device fabrication and characterization.
Main Results:
- Achieved phase-pure FA-based 2D/3D heterostructures.
- Demonstrated efficient defect management.
- Attained a power conversion efficiency of 25.02%.
- Showcased outstanding long-term stability under thermal stress.
Conclusions:
- The phase-selective redissolution strategy is effective for fabricating high-performance perovskite solar cells.
- This method addresses key challenges in perovskite material stability and efficiency.
- The resulting heterostructures offer a promising pathway for next-generation photovoltaics.
