Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Mini-review on VO2-based Sensors Utilizing Metal-insulator Transition

  • Hyeongyu Gim (Deparement of of Materials Science and Engineering, Chonnam National University) ;
  • Minho Lee (Deparement of of Materials Science and Engineering, Chonnam National University) ;
  • Woojin Hong (Deparement of of Materials Science and Engineering, Chonnam National University) ;
  • Kootak Hong (Deparement of of Materials Science and Engineering, Chonnam National University)
  • Received : 2024.08.28
  • Accepted : 2024.09.09
  • Published : 2024.09.30
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Abstract

With the advent of artificial intelligence and Internet of Things, demands for high-performance sensors with high sensitivity and ultrafast response for big data acquisition and processing have increased. VO2, a strongly correlated material, has been shown to exhibit a reversible and abrupt resistance change in the sub-nanosecond scale through a phase transition from an insulating to a metallic state at 68℃. The metal-insulator transition (MIT) of VO2 provides the potential for the development of highly sensitive and ultrafast high-performance sensors. This is because it can be triggered by various external stimuli, such as heat, light, gas adsorption/desorption, and strain. Therefore, attempts have been made to develop high-performance sensors by controlling the MIT of VO2 in response to external stimuli. This study reviewed recent progress in various VO2-based sensors that utilize MIT, including photodetectors, gas sensors, and strain sensors. This review is expected to serve as an overview of the approaches for controlling the MIT behavior of VO2 and provide insights into the design of high-performance sensors that exploit MIT.

Keywords

Acknowledgement

This work was supported by the Korea Institute for Advancement of Technology (KIAT) grant funded by the Ministry of Education (Grant No. P0025690, Semiconductor-Specialized University), Basic Science Research Capacity Enhancement Project through Korea Basic Science Institute (National Research Facilities and Equipment Center) grant funded by the Ministry of Education (Grant No. 2019R1A6C1010024), and the 'Regional Innovation Strategy (RIS)' through the National Research Foundation of Korea (NRF) funded by the Ministry of Education of Korea (Grant No. 2021RIS-002).

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