P5.11 - Cyclic optical activation of semiconducting gas sensors: influence of cycling frequency
- Event
- AMA Conferences 2017
2017-05-30 - 2017-06-01
Nürnberg, Germany - Band
- Proceedings Sensor 2017
- Chapter
- P5 - Gas, Chemo and Biosensors
- Author(s)
- T. Wagner, D. Klawinski - Paderborn University (Germany), D. Meixner, C. Kohl - Justus-Liebig-University Giessen (Germany)
- Pages
- 731 - 733
- DOI
- 10.5162/sensor2017/P5.11
- ISBN
- 978-3-9816876-4-4
- Price
- free
Abstract
Resistive semiconducting gas sensors are typically cost-efficient and highly sensitive devices. However, due to the detection mechanism based on oxidizing or reducing surface reactions they lack in inherent selectivity. To compensate this, different methods can be applied, as e.g. utilizing catalytic supplements or temperature cycled operation, each with its specific pros and cons. Here we present a new method based on the utilization of surface reaction kinetics by cyclic optical activation in the
UV/Vis range. Optical activation enables low temperature operation of the sensing element and therefore reduces the power consumption of the element drastically. This work focuses on the systematic optimization process of the illumination cycle for detection of ozone on nanoporous indium oxide (In2O3) sensing layer.