Reinforced Perovskite‐Substrate Interfaces via Multi‐Sited and Dual‐Sided Anchoring
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.
Article Details
Authors (12)
Liqing Zhan
Key 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
Shuo Zhang
Weiqun Gao
State Key Laboratory of Chemical Engineering School of Chemical Engineering East China University of Science and Technology Shanghai 200237 P. R. China
Weizhong Zheng
School of Chemical Engineering
Zhihao Li
Xianyuan Jiang
School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China
Zhijun Ning
School of Physical Science and Technology
Liyuan Han
Zhen Li
Martin Stolterfoht
Wei‐Hong Zhu
Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Shanghai Key Laboratory of Functional Materials Chemistry Feringa Nobel Prize Scientist Joint Research Center Institute of Fine Chemicals Frontiers Science Center For Materiobiology and Dynamic Chemistry School of Chemistry and Molecular Engineering East China University of Science and Technology Shanghai China
Yongzhen Wu
Key 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