Moisture-Stable Intermediate Phase Manipulation for Efficient Perovskite Solar Cells Fabricated in Ambient Air
Fabricating high-efficiency perovskite solar cells (PSCs) in ambient air can facilitate their low-cost industrialization. However, the metastable wet-film stage before annealing during the film deposition process is susceptible to moisture invasion, making it difficult to form black-phase formamidinium lead iodide (α-FAPbI3) perovskites in ambient air. Herein, we construct a moisture-stable intermediate phase dominated by δ-FAPbI3 in the metastable wet-film stage using acetimidamidal acetate (AceAc). AceAc can induce the formation of δ-FAPbI3 to resist the invasion of moisture on a wet film, further transforming the formed δ-FAPbI3 into pure α-FAPbI3 in the presence of MACl. The resulting PSCs fabricated in ambient air achieve a power conversion efficiency (PCE) of 26.5% (certified at 25.9%) and maintain 98% of the initial PCE after 11000 h of aging under air conditions (25% relative humidity (RH) and 25 °C).
Authors
- Zhenhuang Su (ORCID: https://orcid.org/0000-0003-0026-2601)
- Yang Fu (ORCID: https://orcid.org/0000-0003-3842-1559)
- Meicheng Li (ORCID: https://orcid.org/0000-0002-0731-741X)
- Changxu Sun
- Benyu Liu (ORCID: https://orcid.org/0000-0001-5812-7221)
- Hao Huang (ORCID: https://orcid.org/0000-0003-4416-5459)
- Peng Cui (ORCID: https://orcid.org/0000-0002-5869-4493)
- Xingyu Gao (ORCID: https://orcid.org/0000-0003-1477-0092)
- Zhineng Lan
- Shujie Qu (ORCID: https://orcid.org/0000-0003-4862-3648)
- Min Wang (ORCID: https://orcid.org/0000-0002-5160-7852)
- Yi Lu (ORCID: https://orcid.org/0000-0002-6664-2095)
- Yingying Yang (ORCID: https://orcid.org/0000-0001-6779-080X)
- Liang Li (ORCID: https://orcid.org/0000-0003-2531-7007)
- Luyao Yan
- Shuxian Du (ORCID: https://orcid.org/0009-0002-4693-5429)
Institutions
- North China Electric Power University (CN)
- Primary Source (US)
- Shanghai Advanced Research Institute (CN)
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources
Publication Details
- Journal
- ACS Energy Letters
- Published
- 2025-09-29
- DOI
- https://doi.org/10.1021/acsenergylett.5c02481
- Citations
- 3
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 2.19