Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Hydrogen Gas Sensor Performance of a p-CuO/n-ZnO Thin-film Heterojunction

p-CuO/n-ZnO 이종접합 박막 구조의 수소 가스 특성 평가

  • Yang, Yijun (Advanced mechatronics R&D Group, Korea Institute of Industrial Technology) ;
  • Maeng, Bohee (Advanced mechatronics R&D Group, Korea Institute of Industrial Technology) ;
  • Jung, Dong Geon (Advanced mechatronics R&D Group, Korea Institute of Industrial Technology) ;
  • Lee, Junyeop (Advanced mechatronics R&D Group, Korea Institute of Industrial Technology) ;
  • Kim, Yeongsam (Advanced mechatronics R&D Group, Korea Institute of Industrial Technology) ;
  • An, Hee Kyung (Advanced mechatronics R&D Group, Korea Institute of Industrial Technology) ;
  • Jung, Daewoong (Advanced mechatronics R&D Group, Korea Institute of Industrial Technology)
  • 양이준 (한국생산기술연구원첨단메카트로닉스연구그룹) ;
  • 맹보희 (한국생산기술연구원첨단메카트로닉스연구그룹) ;
  • 정동건 (한국생산기술연구원첨단메카트로닉스연구그룹) ;
  • 이준엽 (한국생산기술연구원첨단메카트로닉스연구그룹) ;
  • 김영삼 (한국생산기술연구원첨단메카트로닉스연구그룹) ;
  • 안희경 (한국생산기술연구원첨단메카트로닉스연구그룹) ;
  • 정대웅 (한국생산기술연구원첨단메카트로닉스연구그룹)
  • Received : 2022.08.28
  • Accepted : 2022.09.15
  • Published : 2022.09.30
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Abstract

Hydrogen (H2) gas is widely preferred for use as a renewable energy source owing to its characteristics such as environmental friendliness and a high energy density. However, H2 can easily reverse or explode due to minor external factors. Therefore, H2 gas monitoring is crucial, especially when the H2 concentration is close to the lower explosive limit. In this study, metal oxide materials and their p-n heterojunctions were synthesized by a hydrothermal-assisted dip-coating method. The synthesized thin films were used as sensing materials for H2 gas. When the H2 concentration was varied, all metal oxide materials exhibited different gas sensitivities. The performance of the metal oxide gas sensor was analyzed to identify parameters that could improve the performance, such as the choice of the metal oxide material, effect of the p-n heterojunctions, and operating temperature conditions of the gas sensor. The experimental results demonstrated that a CuO/ZnO gas sensor with a p-n heterojunction exhibited a high sensitivity and fast response time (134.9% and 8 s, respectively) to 5% H2 gas at an operating temperature of 300℃.

Keywords

Acknowledgement

본 논문은 한국생산기술연구원 기본사업 "산업재해 및 안전사고 방지를 위한 변색성 유해가스 감지 실용화 센서 시스템 개발 (Kitech UI-22-0016)" 지원으로 수행한 연구임. 본 논문은 2020년도 정부(과학기술정보통신부)의 재원으로 연구개발특구진흥재단의지원을받아수행된연구임(2020-DD-UP-0348). 본 연구는 2021년도 중소벤처기업부의 기술개발사업 지원에 의한 연구임 [S3177927].

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