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Published on: March 19, 2017
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Room Temperature Ionic Liquid Capping Layer for High Efficiency FAPbI3 Perovskite Solar Cells with Long-Term
Qiang Lou1, Xinxin Xu1, Xueqing Lv1
1School of Electronic and Computer Engineering, Peking University Shenzhen Graduate School, Shenzhen, 518055, China.
Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|March 13, 2024
Summary
A novel ionic liquid, n-butylamine acetate (BAAc), effectively passivates formamidinium lead iodide perovskite solar cells at room temperature. This method enhances efficiency to 24.76% and improves long-term stability for scalable perovskite solar cell manufacturing.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Ionic liquids (ILs) are known additives for perovskite solar cells, but their integration is complex.
- Achieving efficient and stable perovskite solar cells requires effective defect passivation.
Purpose of the Study:
- To investigate n-butylamine acetate (BAAc) as a room-temperature passivation agent for formamidinium lead iodide (FAPbI3) perovskite films.
- To evaluate the impact of BAAc passivation on solar cell performance and stability.
Main Methods:
- Room-temperature spin-coating of BAAc as a capping layer on FAPbI3 films.
- Fabrication and characterization of n-i-p perovskite solar cells and mini-modules.
- Assessment of surface defect passivation, energy level alignment, and long-term stability.
Main Results:
- BAAc achieved uniform and thorough passivation of FAPbI3 surface defects.
- Improved energy level alignment for enhanced hole extraction.
- Champion solar cell achieved 24.76% PCE with 1.19 V Voc.
- Mini-module achieved 20.47% PCE.
- T80 lifetime of 3500 hours under ambient conditions.
Conclusions:
- Room-temperature BAAc passivation is a viable and effective strategy for high-performance perovskite solar cells.
- This method offers a pathway for industrial-scale manufacturing of stable perovskite solar cells.
- BAAc enhances both efficiency and operational stability of FAPbI3-based devices.
