Related Experiment Video
Updated: Jul 12, 2025
05:15
Flash Infrared Annealing for Perovskite Solar Cell Processing
Published on: February 3, 2021
7.9K
Interface Engineering with Formamidinium Salts for Improving Ambient-Processed Inverted CsPbI3 Photovoltaic
Tianxiang Li1, Wan Li1, Kun Wang2,3
1State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU), Xi'an 710072, P. R. China.
ACS Applied Materials & Interfaces
|October 26, 2023
Summary
This study introduces a novel intermediate-treatment method for all-inorganic perovskite solar cells (PSCs). This technique enhances moisture resistance and device performance, paving the way for cost-effective manufacturing.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- All-inorganic perovskite solar cells (PSCs) offer thermal stability and fabrication ease.
- Ambient processing is crucial for practical PSC production, but water sensitivity is a challenge.
- Current surface treatments often occur post-fabrication, limiting control over crystal formation.
Purpose of the Study:
- To develop and evaluate a surface intermediate-treatment strategy for stabilizing CsPbI3 perovskites during ambient air fabrication.
- To investigate the impact of formamidinium (FA) salt treatment on perovskite film quality and device performance.
- To provide a guideline for low-cost manufacturing of stable, high-efficiency inverted PSCs.
Main Methods:
- Employed a surface intermediate-treatment using formamidinium (FA) salts on CsPbI3 perovskites during fabrication.
- Compared the effects of intermediate-treatment versus post-treatment strategies.
- Analyzed perovskite crystal formation, moisture resistance, defect passivation, and energy level alignment.
- Fabricated and characterized inverted PSC devices.
Main Results:
- Intermediate-treatment with FA salts significantly improved moisture resistance of CsPbI3 perovskites.
- Accelerated crystallization and reduced moisture exposure during fabrication minimized water damage.
- Defect passivation and optimized energy level matching suppressed nonradiative recombination.
- Optimized devices achieved a power conversion efficiency of 15.45%, up from 11.39%.
- Enhanced long-term stability was observed, retaining 97.6% efficiency after 1600 hours.
Conclusions:
- The proposed intermediate-treatment strategy effectively stabilizes all-inorganic perovskites fabricated in ambient air.
- This method offers a promising approach for developing stable and efficient inverted PSCs.
- The findings support the feasibility of low-cost, large-scale manufacturing of perovskite solar cells.
