Minimizing Redox‐Reactivity to Improve the Stability of Perovskite/Silicon Tandem Solar Cells
Abstract Perovskite/silicon tandem solar cells have shown great promise as a next‐generation photovoltaic technology. However, the instability of perovskite significantly lags behind its remarkable progress in power conversion efficiencies (PCE). It mainly results from the halide phase segregation due to the redox reactions at the grain boundaries (GBs) in perovskites. Therefore, reducing GB density is the most straightforward way to reduce the redox‐active site and improve its long‐term stability. Herein, GB density of the perovskite is controlled by nucleation and growth kinetics through comparison of two different perovskite fabrication methods, one‐step and hybrid two‐step method. It is found that the hybrid two‐step method exhibits a much slower nucleation and crystallization rate than the one‐step method. It significantly reduces the GB density, decreases the possibility of I − oxidation and Pb 2+ reduction, and eliminates phase segregation. Therefore, perovskite solar cells (PSCs) and perovskite/silicon tandem solar cells fabricated by the hybrid two‐step method retain at 95% and 83% of initial PCEs after 1000 and 500 h of maximum power point tracking (MPPT) at room temperature in nitrogen (N 2 ), respectively, which is ≈10 and 6 times longer than the one prepared by one‐step method.
Authors
- Yi‐Bing Cheng (ORCID: https://orcid.org/0000-0003-0604-1965)
- Lan Yao (ORCID: https://orcid.org/0000-0002-2554-6590)
- Zhiwen Yin (ORCID: https://orcid.org/0000-0002-9510-1714)
- Wangnan Li (ORCID: https://orcid.org/0000-0003-3558-6956)
- Mathias Uller Rothmann (ORCID: https://orcid.org/0000-0003-4361-9391)
- Jungan Wang (ORCID: https://orcid.org/0009-0009-7424-5012)
- Tao Zeng (ORCID: https://orcid.org/0000-0002-1553-7850)
- Wei Jiang (ORCID: https://orcid.org/0000-0002-4604-9796)
- Xinjun Yang (ORCID: https://orcid.org/0000-0001-7847-1409)
- Wei Li (ORCID: https://orcid.org/0000-0001-6261-1761)
- Xinyu Zhang (ORCID: https://orcid.org/0000-0003-2051-2655)
- Yunxia Chen (ORCID: https://orcid.org/0000-0003-1701-6503)
- Yu‐Chen Wang (ORCID: https://orcid.org/0009-0003-2264-1247)
- Yan Gao (ORCID: https://orcid.org/0009-0007-1734-6955)
- Qing Yuan (ORCID: https://orcid.org/0000-0003-0883-7668)
- Yongguang Xiao (ORCID: https://orcid.org/0000-0003-1298-6906)
- Menglei Xu (ORCID: https://orcid.org/0000-0002-3422-9984)
- Guo Chang
- Hong‐Qiang Du
- Jie Yang (ORCID: https://orcid.org/0000-0003-0641-6296)
- Aoshuo Tian
Institutions
- Jingdezhen Ceramic Institute (CN)
- Wuhan University of Technology (CN)
- Ji Hua Laboratory (CN)
- Hubei University of Arts and Science (CN)
Publication Details
- Journal
- Advanced Energy Materials
- Published
- 2025-06-22
- DOI
- https://doi.org/10.1002/aenm.202502057
- Citations
- 6
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 4.38
Funders
- National Natural Science Foundation of China
- Natural Science Foundation of Guangdong Province
- Natural Science Foundation of Hubei Province
- Wuhan University
- Wuhan University of Technology
- Guangdong Provincial Pearl River Talents Program