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Updated: Apr 24, 2026
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A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
Published on: April 8, 2018
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Layered van der Waals Ferroelectric BiOI for High-Performance Multistate Memory.
Lele Ren1,2,3, Zaichun Sun3, Yunfan Wang3
1State Key Laboratory of Advanced Glass Materials, Wuhan University of Technology, Wuhan 430070, China.
Nano Letters
|April 23, 2026
Summary
Bismuth oxyiodide (BiOI) shows promising ferroelectric properties for future nanoelectronics. This two-dimensional material exhibits robust polarization switching and memory capabilities, making it ideal for advanced devices.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Van der Waals layered ferroelectrics are key for next-generation nanoelectronics.
- Two-dimensional (2D) oxyhalides offer excellent dielectric and electronic properties.
- Ferroelectric polarization in 2D oxyhalides remains underexplored.
Purpose of the Study:
- Investigate intrinsic ferroelectric properties of van der Waals bismuth oxyiodide (BiOI).
- Explore BiOI's potential for high-performance ferroelectric memory devices.
Main Methods:
- Synthesis of BiOI using mist chemical vapor deposition.
- Characterization of ferroelectric domain reversal (in-plane and out-of-plane).
- Fabrication and testing of BiOI-based ferroelectric memristors.
Main Results:
- BiOI exhibits a high Curie temperature (approx. 450 K).
- Demonstrated ferroelectric domain reversal in both in-plane and out-of-plane directions.
- BiOI memristors show a high switching ratio (10^4), long retention (10^4 s), and excellent cycle stability (10,000 cycles).
- BiOI enables multistate data storage.
Conclusions:
- BiOI possesses significant intrinsic ferroelectric properties.
- The material is suitable for high-performance ferroelectric memory applications.
- This study lays groundwork for further research into bismuth oxyhalides.
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