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Stacked-Type Potentiometric Solid-State CO2 Gas Sensor
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- Authors
- Nak-Jin Choi, Hyung-Kun Lee, Seung Eon Moon, Woo Seok Yang, Jongdae Kim
- Issue Date
- 2013-10
- Citation
- Sensors and Actuators B : Chemical, v.187, pp.340-346
- ISSN
- 0925-4005
- Publisher
- Elsevier
- Language
- English
- Type
- Journal Article
- Abstract
- 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.
- KSP Keywords
- Active area, Alumina substrate, Diffraction analysis, Gas concentration, Gas response, Indoor environment, Measurement range, Operating Temperature, Planar-type, Recovery time, Reference material