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Web-drive based source measure unit for automated evaluations of ionic liquid-gated MoS2 transistors
So Jeong Park1, Dae-Young Jeon2, Young-Sun Moon1
1School of Electrical Engineering, Korea University, Seoul 02841, South Korea.
The Review of Scientific Instruments
|January 3, 2020
Summary
A portable, WiFi-enabled Source Measure Unit (SMU) was developed for electrical characterization of 2D semiconductors. This device enables reliable data collection and storage for continuous monitoring in harsh environments.
Area of Science:
- Materials Science
- Electrical Engineering
- Device Physics
Background:
- Reliable characterization of 2D semiconducting devices is crucial for their application.
- Continuous monitoring in toxic environments requires robust and portable measurement systems.
- A massive, accessible database for electrical characterization is desirable.
Purpose of the Study:
- To develop a portable, web-drive based Source Measure Unit (SMU) with WiFi connectivity.
- To enable automatic construction of a measurement database for online storage.
- To demonstrate the SMU's capability for reliable electrical characterization of 2D materials.
Main Methods:
- A microcontroller-based, web-drive SMU was designed and implemented.
- Superior voltage source and measurement capabilities were achieved (∼1 mV, ∼0.15 mV/∼1 nA).
- Web-drive based software facilitated automatic database construction and online storage.
Main Results:
- The developed SMU demonstrated performance comparable to commercial systems for characterizing MoS2 transistors.
- Ionic liquid-gated transistors showed low on-state operation bias (∼1.5 V) due to high gate capacitance.
- Extracted electrical parameters were successfully uploaded to the web-drive.
Conclusions:
- The portable SMU is suitable for reliable electrical characterization of 2D semiconducting devices.
- The device enables continuous monitoring and data logging in challenging environments.
- Ionic liquid-gated transistors are promising for low-power applications.
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