Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Photoactivated Metal Oxide-based Chemiresistors: Revolutionizing Gas Sensing with Ultraviolet Illumination

  • Sunwoo Lee (Thin Film Materials Research Center, Korea Research Institute of Chemical Technology) ;
  • Gye Hyeon Lee (Thin Film Materials Research Center, Korea Research Institute of Chemical Technology) ;
  • Myungwoo Choi (Department of Materials Science and Engineering, Korea University) ;
  • Gana Park (Thin Film Materials Research Center, Korea Research Institute of Chemical Technology) ;
  • Dakyung Kim (Energy Materials, University of Science of Technology and Education) ;
  • Sangbin Lee (Energy Materials, University of Science of Technology and Education) ;
  • Jeong-O Lee (Thin Film Materials Research Center, Korea Research Institute of Chemical Technology) ;
  • Donghwi Cho (Thin Film Materials Research Center, Korea Research Institute of Chemical Technology)
  • Received : 2024.09.02
  • Accepted : 2024.09.13
  • Published : 2024.09.30
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Abstract

Chemiresistors play a crucial role in numerous research fields, including environmental monitoring, healthcare, and industrial safety, owing to their ability to detect and quantify gases with high sensitivity and specificity. This review provides a comprehensive overview of the recent advancements in photoactivated chemiresistors and emphasizes their potential for the development of highly sensitive, selective, and low-power gas sensors. This study explores a range of structural configurations of sensing materials, from zero-dimensional quantum dots to three-dimensional, porous nanostructures and examines the impact of these designs on the photoactivity, gas interactions, and overall sensor performance-including gas responses and recovery rates. Particular focus is placed on metal-oxide semiconductors and the integration of ultraviolet micro-light emitting diodes, which have gained attention as key components for next-generation sensing technologies owing to their superior photoactivity and energy efficiency. By addressing existing technical challenges, such as limited sensitivity, particularly at room temperature (~22℃), this paper outlines future research directions, highlighting the potential of photoactivated chemiresistors in developing high-performance, ultralow-power gas sensors for the Internet of Things and other advanced applications.

Keywords

Acknowledgement

S. L., G. H. L., and M. C. contributed equally to this study. This study was supported by the Korea Research Institute of Chemical Technology (KRICT) Republic of Korea (KS2321-10). This work was also supported by the National Research Foundation of Korea (NRF) grant funded by the Korean Government (Ministry of Science and ICT) (RS-2024-00421857).

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