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학술지 Stacked-Type Potentiometric Solid-State CO2 Gas Sensor
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저자
최낙진, 이형근, 문승언, 양우석, 김종대
발행일
201310
출처
Sensors and Actuators B : Chemical, v.187, pp.340-346
ISSN
0925-4005
출판사
Elsevier
DOI
https://dx.doi.org/10.1016/j.snb.2012.12.037
협약과제
12MB2400, 스마트&그린 빌딩용 자가충전 지능형 센서노드 플랫폼 핵심기술 개발, 김종대
초록
A Li-ion based stacked-type potentiometric solid-state (S-PSS) sensor was designed and fabricated to detect carbon dioxide (CO2) on an alumina substrate in an indoor environment using mass production techniques. This design can reduce 70% of the active area compared to a planar-type potentiometric solid-state (P-PSS) sensor, as a reference material is not required. All deposition materials used in the sensor were screen-printed except for the electrolyte, which was deposited using thermal evaporation. The prepared materials were characterized through an X-ray diffraction analysis and scanning electron microscopy. The gas response characteristics of the S-PSS and P-PSS were examined a temperature range of 350-500°C and for CO2 gas concentrations of between 16 and 5000ppm. The S-PSS sensor showed a response of 40-90 mV/dec, which is similar to the P-PSS sensor performance at the same operating temperatures. The response and recovery times of the S-PSS were about 2 and 4 s, respectively. Repeated measurements showed a very good consistency of within 5 mV in a full measurement range. © 2012 Elsevier B.V. All rights reserved.
키워드
Carbon dioxide, Gas sensor, Small active area, Stacked-type, USN
KSP 제안 키워드
Active area, Alumina substrate, Gas response, Indoor Environment, Li-ion, Measurement range, Planar-type, Reference material, Repeated measurements, Response and recovery, Response characteristics