Halide Perovskite Inducing Anomalous Nonvolatile Polarization in Poly(vinylidene fluoride)-based Flexible Nanocomposites

Yao Wang; Chen Huang; Ziwei Cheng; Zhenghao Liu; Yuan Zhang; Yantao Zheng; Shulin Chen; Jie Wang; Peng Gao; Yang Shen; Chungang Duan; Yuan Deng; Ce-Wen Nan; Jiangyu Li

doi:10.1038/s41467-024-48348-4

Halide Perovskite Inducing Anomalous Nonvolatile Polarization in Poly(vinylidene fluoride)-based Flexible Nanocomposites

Nat Commun. 2024 May 10;15(1):3943. doi: 10.1038/s41467-024-48348-4.

Authors

Yao Wang¹, Chen Huang², Ziwei Cheng², Zhenghao Liu^{3

4}, Yuan Zhang^{3

4}, Yantao Zheng², Shulin Chen⁵, Jie Wang⁶, Peng Gao^{5

7}, Yang Shen⁸, Chungang Duan⁹, Yuan Deng¹⁰, Ce-Wen Nan⁸, Jiangyu Li^{11

12}

Affiliations

¹ School of Materials Science and Engineering, Beihang University, Beijing, 100191, China. wang-yao@buaa.edu.cn.
² School of Materials Science and Engineering, Beihang University, Beijing, 100191, China.
³ Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China.
⁴ Guangdong Provincial Key Laboratory of Functional Oxide Materials and Devices, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China.
⁵ International Center for Quantum Materials and Electron Microscopy Laboratory, School of Physics, Peking University, Beijing, 100871, China.
⁶ Department of Engineering Mechanics, Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Zhejiang University, Hangzhou, 310027, Zhejiang, China.
⁷ Collaborative Innovation Center of Quantum Matter, Beijing, 100871, China.
⁸ School of Materials Science and Engineering, State Key Lab of New Ceramics and Fine Processing, Tsinghua University, Beijing, 100084, China.
⁹ State Key Laboratory of Precision Spectroscopy and Key Laboratory of Polar Materials and Devices, Ministry of Education, Department of Electronics, East China Normal University, Shanghai, 200241, China.
¹⁰ Key Laboratory of Intelligent Sensing Materials and Chip Integration Technology of Zhejiang Province, Hangzhou Innovation Institute, Beihang University, Hangzhou, 310052, Zhejiang, China.
¹¹ Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China. lijy@sustech.edu.cn.
¹² Guangdong Provincial Key Laboratory of Functional Oxide Materials and Devices, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China. lijy@sustech.edu.cn.

Abstract

Ferroelectric materials have important applications in transduction, data storage, and nonlinear optics. Inorganic ferroelectrics such as lead zirconate titanate possess large polarization, though they are rigid and brittle. Ferroelectric polymers are light weight and flexible, yet their polarization is low, bottlenecked at 10 μC cm^-2. Here we show poly(vinylidene fluoride) nanocomposite with only 0.94% of self-nucleated CH₃NH₃PbBr₃ nanocrystals exhibits anomalously large polarization (~19.6 μC cm^-2) while retaining superior stretchability and photoluminance, resulting in unprecedented electromechanical figures of merit among ferroelectrics. Comprehensive analysis suggests the enhancement is accomplished via delicate defect engineering, with field-induced Frenkel pairs in halide perovskite stabilized by the poled ferroelectric polymer through interfacial coupling. The strategy is general, working in poly(vinylidene fluoride-co-hexafluoropropylene) as well, and the nanocomposite is stable. The study thus presents a solution for overcoming the electromechanical dilemma of ferroelectrics while enabling additional optic-activity, ideal for multifunctional flexible electronics applications.

Grants and funding

51872009/National Natural Science Foundation of China (National Science Foundation of China)