ROLE OF HETERO-JUNCTIONS IN OXIDE SEMICONDUCTOR GAS SENSORS

Authors
YAMAZOE N TAMAKI J MIURA N
Citation
N. Yamazoe et al., ROLE OF HETERO-JUNCTIONS IN OXIDE SEMICONDUCTOR GAS SENSORS, Materials science & engineering. B, Solid-state materials for advanced technology, 41(1), 1996, pp. 178-181
Citations number
12
Categorie Soggetti
Material Science","Physics, Condensed Matter
Journal title
Materials science & engineering. B, Solid-state materials for advanced technology → ACNP
ISSN journal
09215107
Volume
41
Issue
1
Year of publication
1996
Pages
178 - 181
Database
ISI
SICI code
0921-5107(1996)41:1<178:ROHIOS>2.0.ZU;2-3
Abstract
A new design concept of semiconductor gas sensors, which introduces a foreign antenna material to a gas in problem, is described for the det ection of dilute odorous gases such as HN3 and H2S. The antenna materi al, dispersed on the surface of a semiconducting oxide, interacts with the gas sensitively and selectively, and the resulting change in its chemical stale induces a change in semiconducting properties of the un derlying oxide through hetero-junctions. Typical examples of such sens ors include NH3 sensors using Au- and Pt-WO3 and an H2S sensor using C uO-SnO2.