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journal article·2024-12Open access

High‐Temperature Driven Recrystallization for Stable Dopant‐Free α‐FAPbI 3 Perovskite Solar Cells

Lingbo Xiao, Xiaoli Xu, Jie Zhao, Chen Wang, Zheng Lu, Lutao Li, Liang He, Yu Chen, Guifu Zou

Advanced Science· Volume 11· Issue 48
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Source abstract

Abstract

Abstract High temperatures facilitate the formation of stable, high‐crystallinity α‐FAPbI 3 films but can lead to the volatilization of organic components in perovskites. Here, a 300 °C hot‐press‐assisted recrystallization strategy is reported to grow stable phase‐pure α‐FAPbI 3 film without any dopants. High temperature can promote the transformation of δ‐FAPbI 3 to α‐FAPbI 3 , and induces recrystallization to relieve strain. The applied pressure creates a confined space that effectively prevents the volatilization of organic components in perovskite. The α‐FAPbI 3 film prepared by hot‐press at 300 °C achieves an average grain size of ≈3 µm (with grains up to 10 µm) and demonstrates excellent damp‐heat stability, showing no significant change after 20 s in deionized water. The result solar cell delivers a power conversion efficiency as high as 24.06% and retains >70% of their initial efficiency value after 1000 h at 85 °C and 85% relative humidity.
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Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Chalcogenide Semiconductor Thin Films · Quantum Dots Synthesis And Properties

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

Affiliations

Department of Applied Physics Zhejiang University of Science and Technology Hangzhou Zhejiang 310008 P. R. China

College of Energy Soochow Institute for Energy and Materials Innovations Jiangsu Key Laboratory of Advanced Negative Carbon Technologies and Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province Soochow University Suzhou 215000 P. R. China

College of Materials and Chemistry China Jiliang University Hangzhou 310018 P. R. China

Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics Southeast University Nanjing 211189 P. R. China

National Photovoltaic Engineering Research Center LDK Solar Co., Ltd Xinyu 338032 P. R. China

Beijing Synchrotron Radiation Facility Institute of High Energy Physics Beijing 100049 P. R. China

Funding

National Natural Science Foundation of China · Natural Science Foundation of Jiangsu Province · Natural Science Foundation of Zhejiang Province

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