journal article·2025-07

Reinforced Perovskite‐Substrate Interfaces via Multi‐Sited and Dual‐Sided Anchoring

Liqing Zhan, Shuo Zhang, Weiqun Gao, Weizhong Zheng, Zhihao Li, Xianyuan Jiang, Zhijun Ning, Liyuan Han, Zhen Li, Martin Stolterfoht, Wei‐Hong Zhu, Yongzhen Wu

Advanced Materials· Volume 37· Issue 30
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Abstract

Abstract 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.
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Research context

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Organic Electronics and Photovoltaics

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Shanghai Key Laboratory of Functional Materials Chemistry Frontiers Science Center for Materiobiology and Dynamic Chemistry Institute of Fine Chemicals School of Chemistry and Molecular Engineering East China University of Science and Technology Shanghai 200237 P. R. China

State Key Laboratory of Chemical Engineering School of Chemical Engineering East China University of Science and Technology Shanghai 200237 P. R. China

Department of Energy Science and Technology CNPC Economics & Technology Research Institute Beijing 100724 P. R. China

School of Materials Science and Engineering Northwestern Polytechnical University Xi'an 710072 P. R. China

School of Physical Science and Technology ShanghaiTech University Shanghai 201210 P. R. China

State Key Laboratory of Metal Matrix Composites School of Material Science and Engineering Shanghai Jiao Tong University Shanghai 200240 P. R. China

Electronic Engineering Department The Chinese University of Hong Kong Hong Kong SAR 999077 P. R. China

Center of Photosensitive Chemicals Engineering East China University of Science and Technology Shanghai 200237 P. R. China

Funding

National Natural Science Foundation of China · Science and Technology Commission of Shanghai Municipality · Project 211 · China Postdoctoral Science Foundation · Fundamental Research Funds for the Central Universities

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