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Updated: Jan 4, 2026
Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
Published on: February 27, 2017
Highly Efficient and Stable Perovskite Solar Cells Using an Effective Chelate-Assisted Defect Passivation Strategy
Jun Jiang1, Xiang Fang1, Yibo Xu1
1School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Jiangsu Province Cultivation Base for State Key Laboratory of, Photovoltaic Science and Technology, Changzhou University, Changzhou, 213164, Jiangsu, P.R. China.
Thenoyltrifluoroacetone (ttfa) controls perovskite crystal growth, enhancing solar cell quality and stability. This method improves perovskite solar cell efficiency and durability in challenging atmospheric conditions.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Perovskite solar cells (PSCs) face efficiency drops due to atmospheric sensitivity and internal defects.
- Controlling defect density in polycrystalline perovskites remains a significant challenge for high-performance devices.
Purpose of the Study:
- To investigate the use of thenoyltrifluoroacetone (ttfa) as a bidentate chelating agent for controlling perovskite crystallization.
- To improve the quality, efficiency, and stability of perovskite thin films and solar cells.
Main Methods:
- Utilized ttfa to control nucleation and growth during perovskite crystallization.
- Applied ttfa to Cs-, methylammonium-, and formamidinium-based perovskite materials.
- Evaluated perovskite thin films and solar cells for crystalline-state tuning and defect passivation.
Main Results:
- ttfa effectively controlled crystallization kinetics, grain sizes, and crystal defects.
- Achieved crystalline-state tuning during crystallization without additional processing steps.
- Passivated defects, resulting in low defect density and extended charge carrier lifetime.
- ttfa-passivated PSCs reached 19.70% efficiency with 64% retention after two weeks of unencapsulated storage in 50% relative humidity.
Conclusions:
- ttfa is a viable agent for defect passivation and quality enhancement in perovskite films.
- This crystallization control method is suitable for industrial production, improving PSC efficiency and stability.
