Reinforced Perovskite‐Substrate Interfaces via Multi‐Sited and Dual‐Sided Anchoring
Interfacial reliability is critical for the long-term stability of perovskite solar cells (PSCs), yet the perovskite-substrate interface represents the most vulnerable part in high-efficiency devices. Here, this interface, by incorporating a dual-sided anchoring polymeric hole-transporting interlayer is reinforced with abundant coordinating pyridyl units as side chains, which induces strong adhesion between the perovskite and substrate by forming multidimensional interactions with adjacent layers. This simultaneously enhances the mechanical strength through effective distribution and dissipation of mechanical stress and the electronic quality of the perovskite-substrate interface through defect passivation. The resulting PSCs exhibit a high power conversion efficiency (PCE) of 26.8% (certified at 26.6%). With a more robust perovskite composition, devices maintain 98% of their initial PCE of ≈26% after maximum-power-point tracking at 85 °C for 1500 h. These devices exhibit excellent fatigue resistance under thermal cycling (-40 to 85 °C), retaining 93% efficiency after undergoing 900 cycles.
Authors
- Yongzhen Wu (ORCID: https://orcid.org/0000-0003-3000-403X)
- Liqing Zhan (ORCID: https://orcid.org/0000-0002-0414-8980)
- Zhijun Ning (ORCID: https://orcid.org/0000-0002-9130-3490)
- Martin Stolterfoht (ORCID: https://orcid.org/0000-0002-4023-2178)
- Weizhong Zheng (ORCID: https://orcid.org/0000-0002-3866-4932)
- Weihong Zhu (ORCID: https://orcid.org/0000-0001-9103-166X)
- Weiqun Gao
- Xianyuan Jiang (ORCID: https://orcid.org/0000-0001-5966-0175)
- Zhihao Li (ORCID: https://orcid.org/0009-0003-1555-6271)
- Shuo Zhang (ORCID: https://orcid.org/0000-0002-6661-1387)
- Liyuan Han (ORCID: https://orcid.org/0000-0001-9766-9015)
- Zhen Li (ORCID: https://orcid.org/0000-0003-2756-321X)
Institutions
- East China University of Science and Technology (CN)
- Northwestern Polytechnical University (CN)
- Chinese University of Hong Kong (HK)
- Shanghai Jiao Tong University (CN)
- ShanghaiTech University (CN)
- State Key Laboratory of Chemical Engineering (CN)
Publication Details
- Journal
- Advanced Materials
- Published
- 2025-05-19
- DOI
- https://doi.org/10.1002/adma.202506048
- Citations
- 20
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 14.61
Funders
- National Natural Science Foundation of China
- China Postdoctoral Science Foundation
- Science and Technology Commission of Shanghai Municipality
- Project 211
- Fundamental Research Funds for the Central Universities