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Electric and Light Dual-Gate Tunable MoS2 Memtransistor.
ACS Applied Materials & Interfaces
|October 30, 2019
Summary
Researchers developed a multifunctional memristor (a device combining memristor and transistor functions) using 3-layer MoS2. This device exhibits a high switching ratio, enhanced by combined electric and light gating for advanced neuromorphic networks.
Area of Science:
- Materials Science
- Electronics
- Nanotechnology
Background:
- Memristors combined with field-effect transistors (memtransistor) offer multifunctional modulation for neuromorphic networks.
- Two-dimensional (2D) materials are promising for memtransistor applications.
- Limited tunability of the switching ratio in 2D memtransistors hinders practical applications.
Purpose of the Study:
- To investigate a 3-layer MoS2 memtransistor for enhanced multifunctional modulation.
- To explore electric, light, and combined gating effects on memtransistor performance.
- To achieve a high and tunable switching ratio for improved memtransistor applications.
Main Methods:
- Fabrication of a memtransistor using 3-layer MoS2.
- Application of electric gate modulation on resistive switching.
- Application of light gate modulation on conductance.
- Combined electric and light dual gating for performance enhancement.
Main Results:
- Achieved a large-scale tunable switching ratio from 10^0 to 10^5 in electric gate mode.
- Demonstrated a maximum conductance change of 450% under light gate modulation.
- Enhanced the switching ratio to approximately 10^6 using combined electric and light dual gating.
- Attributed the gating effect to the modulation of carrier density in the MoS2 channel.
Conclusions:
- A multifunctional memtransistor with a high and tunable switching ratio was successfully realized using 3-layer MoS2.
- Combined electric and light dual gating offers a simple and effective approach for high-performance memtransistor applications.
- The developed MoS2 memtransistor shows significant potential for advanced neuromorphic computing and electronic devices.
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