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Updated: Jan 18, 2026
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Facile Synthesis of Colloidal Lead Halide Perovskite Nanoplatelets via Ligand-Assisted Reprecipitation
Published on: October 1, 2019
13.6K
Differential Ligand-Cation Interactions Enable 2D-Template-Induced Ordered Assembly for Efficient Tin-Based
Yu Zou1, Jian Liu2, Yide Chang3
1Future Photovoltaics Research Center, Global Institute of Future Technology (GIFT), Shanghai Jiao Tong University, Shanghai, P. R. China.
Advanced Materials (Deerfield Beach, Fla.)
|January 16, 2026
Summary
Environmentally friendly tin halide perovskite (THP) solar cells utilize a fullerene derivative ligand for sequential crystallization. This strategy enhances film quality, boosting power conversion efficiency to 16.6% and device stability.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Tin halide perovskites (THPs) are emerging as eco-friendly alternatives to lead-based solar cells.
- Improving THP film quality is crucial for high-performance devices, often achieved by templating the 3D phase with 2D components.
- Simultaneous crystallization of 2D and 3D phases hinders ordered growth and device performance.
Purpose of the Study:
- To develop a method for controlled sequential crystallization of 2D and 3D THP phases.
- To enhance the quality and stability of tin halide perovskite films for solar cell applications.
- To investigate the role of ligand-cation interactions in programming perovskite assembly.
Main Methods:
- Introduction of a fullerene derivative ligand to mediate distinct ligand-cation interactions.
- Programming A-site cation-mediated sequential assembly and crystallization of 2D and 3D THP phases.
- Fabrication and characterization of THP solar cells using the developed ligand strategy.
Main Results:
- Achieved sequential crystallization with the 2D phase templating the ordered epitaxial growth of the 3D phase.
- Produced highly crystalline, oriented THP films with a homogeneous 2D/3D heterojunction.
- Resulting devices demonstrated a champion power conversion efficiency of 16.6%.
- Unencapsulated devices showed a nine-fold increase in T90 lifetime (882 h vs. 99 h) under operational stress.
Conclusions:
- The fullerene derivative ligand effectively controls sequential crystallization, leading to superior THP film morphology.
- The developed method significantly enhances both the efficiency and operational stability of tin halide perovskite solar cells.
- This approach offers a promising pathway for the commercialization of stable and efficient THP photovoltaics.
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