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High-performance flexible resistive random-access memory based on SnS₂ quantum dots with a charge

Hua An¹, Yiyang Li¹, Yi Ren¹

¹State Key Laboratory of Radio Frequency Heterogeneous Integration (Shenzhen University), School of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, Guangdong, 518060, China. zcpeng@szu.edu.cn.

|June 4, 2024

Summary

Researchers developed flexible resistive random-access memory (RRAM) using tin disulfide quantum dots. This high-performance device offers a large on/off ratio and long retention time for advanced electronics.

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Area of Science:

Materials Science
Nanotechnology
Electronics Engineering

Background:

Resistive random-access memory (RRAM) is crucial for storage and neuromorphic computing.
Transition metal dichalcogenides (TMD) quantum dots (QDs) offer unique electronic and optical properties for RRAM applications.

Purpose of the Study:

To develop a high-performance, flexible RRAM device.
To utilize tin disulfide (SnS2) quantum dots (QDs) for improved memristor characteristics.

Main Methods:

Fabrication of high-quality SnS2 QDs using a facile liquid phase method.
Integration of SnS2 QDs into a flexible RRAM device architecture.
Characterization of the device's electrical switching behavior and performance metrics.

Main Results:

Demonstrated a forming-free flexible RRAM device with high performance.
Achieved a large on/off ratio of approximately 10^6 and a retention time exceeding 3 x 10^4 seconds.
Elucidated the switching mechanism through a charge trapping/de-trapping model involving SnS2 QDs.

Conclusions:

The developed SnS2 QD-based flexible RRAM exhibits excellent performance and flexibility.
The charge trapping/de-trapping mechanism in SnS2 QDs is key to the memristor's switching behavior.
This study advances the development of TMD QD-based flexible memristors for future electronic applications.