Air-Processed <i>n</i> -Butylpyridinium Bromide-Doped CsPbI <sub>2</sub> Br Perovskite Solar Cells: Stress Relief, Energy Level Modulation, and 14.51% Efficiency
to suppress defect-mediated ion migration. Additionally, the hydrophobic structure of the cations retards moisture intrusion, thereby enhancing the environmental stability. The synergistic effect of N-BuPyBr alleviates structural stress, reduces lattice distortion, downshifts the conduction band minimum, and enhances energy level alignment with the electron transport layer (ETL). Consequently, the treated PSCs achieved a power conversion efficiency (PCE) of 14.51% and exhibited superior stability under 25% relative humidity (RH) in ambient conditions, maintaining high performance over an extended period.
Authors
- Jincheng Huang (ORCID: https://orcid.org/0000-0002-6126-5841)
- Runze Yang (ORCID: https://orcid.org/0000-0002-4506-8119)
- Jianlin Chen (ORCID: https://orcid.org/0000-0002-6281-3512)
- Di Chang
- Hengzhi Zuo
- Zhihao Yao
- Ting Li (ORCID: https://orcid.org/0009-0002-7058-9423)
- Zhuoyin Peng
- Siyuan Zhang
- Guijun Li
- Ying Li
Institutions
- Shenzhen University (CN)
- Education Department of Hunan Province (CN)
- Changsha University of Science and Technology (CN)
Publication Details
- Journal
- ACS Applied Materials & Interfaces
- Published
- 2026-04-27
- DOI
- https://doi.org/10.1021/acsami.6c00645
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Education Department of Hunan Province
- National Natural Science Foundation of China
- Natural Science Foundation of Hunan Province
- Chunhui Project Foundation of the Education Department of China