Defect Suppression in Triple-Cation Perovskites via Zwitterionic Choline Bitartrate for Scalable High-Efficiency Photovoltaics
To overcome the instability and scalability challenges of perovskite solar cells, we engineer zwitterionic choline bitartrate as a dual-functional additive. Its tartrate anions passivate undercoordinated Pb<sup>2+</sup> defects through multidentate coordination, while choline cations suppress halide vacancy migration. This synergistic mechanism enables CsFAMA-based devices to achieve 24.92% efficiency (0.05 cm<sup>2</sup>) with exceptional scalability of 24.12% (1 cm<sup>2</sup>) and 21.37% (36 cm<sup>2</sup> modules), while suppressing PbI<sub>2</sub> impurities, enlarging grains, and retaining >95% of the initial power conversion efficiency after 600 h at 85 °C, establishing a new paradigm for stable, high-performance perovskite photovoltaics.
Authors
- Peng Gao (ORCID: https://orcid.org/0000-0002-4963-2282)
- Penghui Yang
- Linfeng Ye (ORCID: https://orcid.org/0009-0009-2355-1773)
- Dayong Qiao (ORCID: https://orcid.org/0000-0003-3392-8844)
- Yonggang Guo
Institutions
- J-Power (Japan) (JP)
- Northwestern Polytechnical University (CN)
- Tianjin Economic-Technological Development Area (CN)
- Micro & Nano Research Institute (CN)
- China XD Group (China) (CN)
Publication Details
- Journal
- ACS Applied Materials & Interfaces
- Published
- 2025-08-20
- DOI
- https://doi.org/10.1021/acsami.5c08877
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Key Research and Development Program of China