at Google ScholarTitle data
Rettig, Frank ; Moos, Ralf:
Semiconducting direct thermoelectric gas sensors.
In: Jaaniso, Raivo ; Tan, Ooi Kiang
(ed.):
Semiconductor gas sensors. 2nd Edition. -
Cambridge, UK
: Woodhead Publishing
,
2020
. - pp. 347-384
ISBN 978-0-08-102559-8
DOI: https://doi.org/10.1016/B978-0-08-102559-8.00011-2
Abstract in another language
This chapter deals with semiconducting direct thermoelectric gas sensors (DTEGs) based on oxide materials. The principle of the sensor is based on a direct measurement of the position of the Fermi level, which can be strongly dependent on the concentration of an analyte in the ambience. The DTEG principle measures a path-independent quantity—the thermovoltage. This makes the sensors extremely resistant to damage stemming from abrasives in gas streams. This chapter shows the importance of developing an adequate transducer and includes a careful analysis of the sensor signals obtained. From a technological point of view, an integration of an equipotential layer for better signal quality will appear to be necessary. Considerable effort is spent on the thermal design of the transducers using finite element method (FEM) modeling. The gas sensitive material itself is analyzed by an FEM model in terms of semiconductor equations combined with thermoelectric equations. The R&D efforts described culminate in a transfer to real-world sensors, which is reported in the final section. The DTEGs manufactured show a fast response and are stable and reproducible. DTEGs can be an alternative to the commonly used resistive or conductometric gas sensors.
Further data
| Item Type: | Article in a book |
|---|---|
| Refereed: | Yes |
| Keywords: | Gas sensor; Simulation; Thermoelectric; Thermopower; Tin oxide |
| Institutions of the University: | Faculties > Faculty of Engineering Science Faculties > Faculty of Engineering Science > Chair Functional Materials > Chair Functional Materials - Univ.-Prof. Dr.-Ing. Ralf Moos Profile Fields > Advanced Fields > Advanced Materials Research Institutions > Research Centres > Bayreuth Center for Material Science and Engineering - BayMAT Faculties Faculties > Faculty of Engineering Science > Chair Functional Materials Profile Fields Profile Fields > Advanced Fields Research Institutions Research Institutions > Research Centres |
| Result of work at the UBT: | Yes |
| DDC Subjects: | 600 Technology, medicine, applied sciences > 620 Engineering |
| Date Deposited: | 09 Feb 2021 07:40 |
| Last Modified: | 09 Feb 2021 07:40 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/62837 |