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Thermodynamically Reinforced Dual-Interface 1D/3D Tin-Lead Perovskite Heterostructure for Stable All-Perovskite
Hui Li1, Zhen Liu1, Bohong Chang1
1Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, School of Materials Science and Engineering, Shandong University, Jinan, 250061, P. R. China.
Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|December 30, 2025
Summary
This study enhances tin-lead perovskite solar cells (PSCs) using a novel salt to create a stable 1D/3D structure. This improves operational reliability and efficiency for tandem solar applications.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Tin-lead perovskite solar cells (PSCs) face challenges with Sn2+ oxidation and crystallization, limiting operational stability.
- Instability hinders the integration of PSCs into tandem solar architectures.
Purpose of the Study:
- To enhance the thermodynamic stability and operational reliability of tin-lead PSCs.
- To engineer a dual-interface 1D/3D perovskite heterostructure for improved photovoltaic performance.
Main Methods:
- Introduction of 4-aminobenzamidine dihydrochloride, a π-conjugated ammonium salt.
- In situ direction of dual-interface 1D/3D perovskite heterostructure formation.
- Utilizing self-assembled 1D perovskitoids as nucleation templates to relieve strain and disorder.
Main Results:
- Achieved a 22.23% power conversion efficiency (PCE) for Sn-Pb PSCs with over 1000 hours of operational lifetime (T98).
- Developed 2-terminal (2T) all-perovskite tandem devices with a 28.50% PCE.
- Demonstrated sustained operational lifetime (T90) of 600 hours for tandem devices.
Conclusions:
- The dual stabilization strategy effectively enhances the structural resilience of Sn-Pb PSCs.
- Lattice stabilization is crucial for advancing the performance and reliability of all-perovskite tandem solar cells.
