Restrictive Heterointerfacial Delamination in Flexible Perovskite Photovoltaics Using a Bifacial Linker
Flexible perovskite solar cells offer significant potential for portable electronics due to their exceptional power density. However, the commercialization of these devices is hampered by challenges related to mechanical flexibility, primarily due to inadequate adhesion between the perovskite absorber layer and the flexible substrate. Herein, this delamination issue is addressed by employing a bifacial linker, potassium benzyl(trifluoro)borate (BnBF<sub>3</sub>K), to enhance adhesion at the SnO<sub>2</sub>/perovskite interface. This approach not only improves the mechanical stability of flexible perovskite devices but also reduces buried surface defects and optimizes energy level alignment. Consequently, a record efficiency of 21.82% (certified at 21.39%) is achieved for a flexible perovskite solar module with an area of 12.80 cm<sup>2</sup> and a high efficiency of 24.15% for a flexible perovskite solar cell. Furthermore, the flexible modules exhibit outstanding mechanical flexibility, retaining 96.56% of their initial efficiency after 6000 bending cycles, demonstrating their suitability for various practical applications.
Authors
- Zihui Liang (ORCID: https://orcid.org/0000-0002-8846-8956)
- Xingfa Gao (ORCID: https://orcid.org/0000-0002-1636-6336)
- Dong Fang Yang (ORCID: https://orcid.org/0000-0002-0518-019X)
- Qunqing Li
- Shaoan Yang
- Xuejie Zhu (ORCID: https://orcid.org/0000-0002-6624-2956)
- Shengzhong Frank Liu (ORCID: https://orcid.org/0000-0002-6338-852X)
- Lu Zhang (ORCID: https://orcid.org/0009-0000-4316-6842)
- Jiaxi Li (ORCID: https://orcid.org/0000-0002-6004-836X)
- Nan Wang (ORCID: https://orcid.org/0000-0001-8100-4326)
- Kai Wang (ORCID: https://orcid.org/0000-0002-9682-0710)
- Y. S. Li (ORCID: https://orcid.org/0009-0003-6542-2239)
- Peijun Wang (ORCID: https://orcid.org/0009-0004-4425-8625)
Institutions
- Dalian Institute of Chemical Physics (CN)
- Wuhan Textile University (CN)
- Dalian National Laboratory for Clean Energy (CN)
- National Center for Nanoscience and Technology (CN)
- University of Chinese Academy of Sciences (CN)
- Shenyang University of Chemical Technology (CN)
- Zhejiang University (CN)
- Shaanxi Normal University (CN)
Publication Details
- Journal
- Advanced Materials
- Published
- 2025-02-13
- DOI
- https://doi.org/10.1002/adma.202419329
- Citations
- 26
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 18.99
Funders
- National Natural Science Foundation of China
- Dalian National Laboratory for Clean Energy