Low-Dimensional Ligand-Driven Design of 2D/3D Perovskite Heterojunctions: Achieving Mitigated Nonradiative Recombination and Robust Stability for Next-Generation Solar Cells
Achieving efficient and stable perovskite solar cells (PSCs) is challenging due to nonradiative recombination, ion migration, and film instability. This study designs low-dimensional (LD) ligands─benzimidazole (BIZ), 1<i>H</i>-benzimidazole, 6-methyl-, (6-MeBIm), and 1<i>H</i>-benzimidazole, 6-(trifluoromethyl)-, (6-TFBIm)─to construct LD/3D perovskite heterojunctions. Compared with BIZ and 6-MeBIm (constructing 1D/3D perovskite heterojunction), the 2D/3D perovskite heterojunction constructed by 6-TFBIm successfully passivated different defects, resulting in a significant reduction in nonradiative recombination and improved carrier transport, leading to a power conversion efficiency (PCE) of 25.25%, outperforming the control devices (PCE: 22.97%). The 2D/3D PSCs exhibit superior humidity and thermal stability, maintaining structural integrity under harsh conditions. These results underscore the role of tailored LD ligands in optimizing perovskite film quality, charge transport, and stability, paving the way for high-performance and durable PSCs.
Authors
- Ye-Hua Gan (ORCID: https://orcid.org/0000-0001-7893-5787)
- Xueru Liu (ORCID: https://orcid.org/0000-0002-7413-4947)
- Qiqi Wang (ORCID: https://orcid.org/0000-0003-2173-5404)
- Pengwei Li (ORCID: https://orcid.org/0009-0001-6523-0427)
- Shiheng Wang
- Chen Ge (ORCID: https://orcid.org/0000-0002-8093-940X)
- Gang Li (ORCID: https://orcid.org/0000-0001-8399-7771)
- Yiqiang Zhang (ORCID: https://orcid.org/0000-0002-2437-925X)
- Jing Yang (ORCID: https://orcid.org/0009-0001-3193-5349)
- Xianglong Sun
- Jian Cheng (ORCID: https://orcid.org/0009-0003-9052-5061)
- Yanlin Song (ORCID: https://orcid.org/0000-0002-0267-3917)
Institutions
- Hong Kong Polytechnic University (HK)
- Chinese Academy of Sciences (CN)
- Zhengzhou University (CN)
- Beijing National Laboratory for Molecular Sciences (CN)
- Molecular Sciences Institute (US)
Publication Details
- Journal
- Nano Letters
- Published
- 2025-05-05
- DOI
- https://doi.org/10.1021/acs.nanolett.5c01455
- Citations
- 3
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 2.19
Funders
- National Natural Science Foundation of China
- China Postdoctoral Science Foundation
- Zhengzhou University
- National Key Research and Development Program of China
- Henan Provincial Science and Technology Research Project
- Science and Technology Innovation Talents in Universities of Henan Province
- Beijing National Laboratory for Molecular Sciences