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Nonvolatile memory devices based on poly(vinyl alcohol) + graphene oxide hybrid composites
Yanmei Sun1, Junguo Lu1, Chunpeng Ai2
1Communication and Electronics Engineering Institute, Qiqihar University, Qiqihar, 161006, China. sym791122@163.com and HLJ Province Key Laboratories of Senior-education for Electronic Engineering, Heilongjiang University, Harbin, 150080, China. wendianzhong@hlju.edu.cn.
Graphene oxide enhances poly(vinyl alcohol) nonvolatile memory devices. These hybrid devices show improved performance, including higher resistance ratios and lower operating voltages, with better stability and repeatability.
Area of Science:
- Materials Science
- Electrical Engineering
- Nanotechnology
Background:
- Nonvolatile memory devices are crucial for modern electronics.
- Poly(vinyl alcohol) (PVA) is a polymer with potential for memory applications.
- Graphene oxide (GO) is a 2D material with unique electronic properties.
Purpose of the Study:
- To fabricate and evaluate nonvolatile memory devices using PVA + graphene oxide (GO) hybrid composites.
- To compare the performance of PVA + GO based devices with pure PVA devices.
- To investigate the impact of GO incorporation on device stability and endurance.
Main Methods:
- Fabrication of Indium Tin Oxide (ITO)/PVA + GO/Aluminum (Al) memory devices.
- Fabrication of ITO/PVA/Al memory devices for comparison.
- Electrical characterization including ON/OFF resistance ratio, SET/RESET voltages, endurance, and write-read-erase-reread (WRER) cycling.
Main Results:
- The ITO/PVA + GO/Al device exhibited a significantly higher ON/OFF resistance ratio (3 × 10^4 at 1 V) compared to the ITO/PVA/Al device (1.2 × 10^2 at 1 V).
- The hybrid device operated at lower voltages: V(SET) ∼ -0.75 V and V(RESET) ∼ 3.0 V, versus V(SET) ∼ -1.45 V and V(RESET) ∼ 3.6 V for the pure PVA device.
- Endurance and WRER tests demonstrated superior stability and repeatability in the PVA + GO devices.
Conclusions:
- Incorporating graphene oxide into a poly(vinyl alcohol) matrix effectively enhances the performance of nonvolatile memory devices.
- The hybrid PVA + GO devices offer improved memory characteristics, including higher ON/OFF ratios and lower operating voltages.
- The enhanced stability and repeatability suggest that PVA + GO composites are promising materials for advanced nonvolatile memory applications.
