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Updated: Feb 11, 2026
05:15
Flash Infrared Annealing for Perovskite Solar Cell Processing
Published on: February 3, 2021
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Crystallization Regulation for Air-Processed, Efficient, and Stable Perovskite Solar Cells via In Situ
Zhengzheng Yao1,2, Xueying Li1,2, Lei Ning1,2
1State Key Laboratory of Bio-based Fiber Materials, Zhejiang Sci-Tech University, Hangzhou 310018, China.
Langmuir : the ACS Journal of Surfaces and Colloids
|February 10, 2026
Summary
This study introduces a novel polymerization strategy using ionic liquids to protect perovskite solar cells from moisture, significantly enhancing their stability and efficiency under harsh conditions.
Area of Science:
- Materials Science
- Renewable Energy
- Chemical Engineering
Background:
- Moisture sensitivity hinders perovskite crystallization and structural perfection.
- Additives are crucial for controlling intermediate phases and mitigating moisture interference.
Purpose of the Study:
- To develop an in situ polymerization-assisted strategy for moisture-resilient perovskite solar cells.
- To investigate the role of polymerizable ionic liquids in perovskite formation and stability.
Main Methods:
- Incorporation of 1-vinyl-3-ethylimidazolium bromide (VEImBr) for in situ polymerization.
- Thermodynamic analysis of intermediate phase evolution during thermal annealing.
- Characterization of perovskite films and solar cell performance.
Main Results:
- VEImBr effectively shields perovskite crystallization from moisture.
- Intermediate phase transitions favor perovskite nucleation and growth kinetics.
- Polymerized VEImBr adheres to grain boundaries, reducing defect density.
- Achieved a champion efficiency of 22.57% for open-air fabricated cells.
- Encapsulated devices retained 80% efficiency after 900h of damp-heat testing.
Conclusions:
- The proposed strategy enhances perovskite solar cell performance and long-term stability.
- In situ polymerization of ionic liquids is a promising approach for moisture-stable perovskites.
- This method offers a pathway for developing durable perovskite solar technologies.
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