High‐Performance Perovskite/Silicon Tandem Solar Cells via Ion Modulation
ABSTRACT Low ion migration activation energy in perovskites leads to severe phase separation and structural instability, damaging the perovskite film uniformity and performance of perovskite/silicon tandem solar cells. Here, we demonstrate that ion modulation can elevate the ion migration energy barrier and improve the local structural stability of perovskite at the atomic level via density functional theory calculations and molecular dynamics simulations. High‐resolution transmission electron microscopy (HRTEM) further revealed the correlation between the ion migration activation energy and the lattice, atomic, and crystalline structure of perovskites. Consequently, we achieved multi‐dimensional (horizontal/ vertical/ microscale) uniform deposition of perovskite films through ion modulation. The target device achieved a champion power conversion efficiency of 33.02% compared with 31.12% for control. Notably, the unencapsulated target device demonstrated negligible efficiency degradation over a 1200 s maximum power point tracking test and retained more than 90% of its initial efficiency following 1000 h of ambient air storage.
Authors
- Jian Yu (ORCID: https://orcid.org/0000-0001-6824-064X)
- Wenzhu Liu (ORCID: https://orcid.org/0000-0003-0239-9089)
- Fan Xu (ORCID: https://orcid.org/0000-0002-6028-4194)
- Kexin Yao (ORCID: https://orcid.org/0000-0002-5686-6909)
- Liping Zhang (ORCID: https://orcid.org/0000-0003-3650-4174)
- Zheng‐Hong Lu (ORCID: https://orcid.org/0000-0003-2050-0822)
- Hong Liu (ORCID: https://orcid.org/0000-0003-3165-8764)
- Zhengxin Liu (ORCID: https://orcid.org/0000-0001-6612-6958)
- Qin Hu (ORCID: https://orcid.org/0000-0003-3089-1070)
- Tinglu Song (ORCID: https://orcid.org/0000-0003-3907-7956)
- Pengyi Tang (ORCID: https://orcid.org/0000-0002-2306-095X)
- Jiahe Ru
- Yuhui Ji
- Na Wang (ORCID: https://orcid.org/0000-0002-4533-2960)
- Chen Yang (ORCID: https://orcid.org/0000-0002-7728-1678)
- Zhenzhu Zhao (ORCID: https://orcid.org/0000-0003-2318-6373)
- Juntao Hu
- Shuangbiao Xia
- Yutao Wang
- Fei Wang
- Jiakai Liu
- Pengxu Chen
- Junjun Li
Institutions
- University of Science and Technology of China (CN)
- Kunming University (CN)
- Chongqing University (CN)
- Southwest Petroleum University (CN)
- University of Toronto (CA)
- Chinese Academy of Sciences (CN)
- Kunming Medical University (CN)
- Xinjiang Technical Institute of Physics & Chemistry (CN)
- Advanced Technology & Materials (China) (CN)
- Shanghai Institute of Microsystem and Information Technology (CN)
- University of Chinese Academy of Sciences (CN)
Publication Details
- Journal
- Advanced Functional Materials
- Published
- 2026-08-20
- DOI
- https://doi.org/10.1002/adfm.77637
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Natural Science Foundation of China
- Science and Technology Commission of Shanghai Municipality
- Shanghai Rising-Star Program
- Natural Science Foundation of Anhui Province
- National Key Research and Development Program of China