Preferred Parallel Alignment of Sulfonamide Enables High‐performance Inverted Perovskite Solar Cells
Molecule additives emerge as a highly effective strategy for enhancing the performance and stability of perovskite solar cells (PSCs), owing to their potential in suppressing intrinsic defects in perovskite. However, the influence of atomic configuration and electronic properties of additives on their passivation performance receives little attention. Here, two benzenesulfonamide derivatives, 4-carboxybenzenesulfonamide (CO-BSA) and 4-cyanobenzenesulfonamide (CN-BSA) are investigated, examining the effects of molecules with different electron‑acceptor functional groups on the defect passivation of perovskite layer and the photovoltaic properties of perovskite solar cells (PSCs. It is found that CN‑BSA and CO‑BSA preferentially adopt parallel-aligned binding orientations within the perovskite, enabling strong coordination to two neighboring undercoordinated Pb<sup>2+</sup> defect sites. Meanwhile, CO‑BSA exhibits a more favorable electronic configuration than CN‑BSA, which endows the functional groups with a higher electron density that enables stronger dual-site binding with uncoordinated Pb<sup>2+</sup> defects. Moreover, incorporating CO-BSA promotes the formation of perovskite films with large grain sizes, high quality, and low defect densities. Consequently, the device modified with CO-BSA achieves an efficiency of 26.53% (certified 26.31%). The encapsulated CO-BSA-based cell retains 96.1% of its initial efficiency after 1100 h of steady-state power output (SPO) measurement in air.
Authors
- Bin Ding (ORCID: https://orcid.org/0000-0001-7973-3183)
- Hailong Huang
- Huanyu Zhang (ORCID: https://orcid.org/0000-0002-2974-9328)
- Jun Peng (ORCID: https://orcid.org/0000-0002-1044-8744)
- Jefferson Zhe Liu (ORCID: https://orcid.org/0000-0002-5282-7945)
- Yurou Zhang (ORCID: https://orcid.org/0000-0003-1288-3472)
- Z.C. Feng (ORCID: https://orcid.org/0009-0009-9305-991X)
- Youyong Li (ORCID: https://orcid.org/0000-0002-5248-2756)
- Weichang Zhou (ORCID: https://orcid.org/0000-0003-3140-5951)
- Jianjun Xu (ORCID: https://orcid.org/0000-0002-4298-1658)
- Dongsheng Tang (ORCID: https://orcid.org/0000-0001-5379-8472)
- Xueqi Wu
- Klaus Weber (ORCID: https://orcid.org/0000-0002-2421-6178)
- Yi Cui (ORCID: https://orcid.org/0000-0002-9182-9038)
- Yan Peng (ORCID: https://orcid.org/0000-0001-6579-3409)
- Nan Hu (ORCID: https://orcid.org/0000-0001-6522-9277)
- Hualin Zhan (ORCID: https://orcid.org/0000-0002-1804-8948)
- Chaopeng Huang (ORCID: https://orcid.org/0000-0002-8861-6891)
- Siyu Chen (ORCID: https://orcid.org/0009-0002-1503-9402)
- Xin Li (ORCID: https://orcid.org/0000-0003-0896-8713)
- Yan‐Bo Wang (ORCID: https://orcid.org/0000-0002-5325-1490)
- Xiangming He (ORCID: https://orcid.org/0000-0001-7146-4097)
- Yitong Liu (ORCID: https://orcid.org/0000-0002-4300-4349)
- Yi Ji (ORCID: https://orcid.org/0000-0001-8462-6438)
- Jingsong Sun
- Xiaohong Zhang (ORCID: https://orcid.org/0000-0003-4435-8357)
- Yuan Fang (ORCID: https://orcid.org/0000-0003-2495-8646)
- Yansen Guo
- Wei Wang (ORCID: https://orcid.org/0009-0009-8053-2800)
- Le Li
Institutions
- Australian National University (AU)
- The University of Melbourne (AU)
- Hunan Normal University (CN)
- Soochow University (CN)
- Suzhou Institute of Nano-tech and Nano-bionics (CN)
- Baidu (China) (CN)
Publication Details
- Journal
- Advanced Materials
- Published
- 2025-06-25
- DOI
- https://doi.org/10.1002/adma.202507918
- Citations
- 19
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 13.88
Funders
- National Science Foundation
- National Computational Infrastructure
- Australian Centre for Advanced Photovoltaics
- National Natural Science Foundation of China
- Australian Renewable Energy Agency
- Higher Education Discipline Innovation Project