DC Field | Value | Language |
---|---|---|
dc.contributor.author | Yang, Dae Jin | ko |
dc.contributor.author | Whitfield, George C. | ko |
dc.contributor.author | Cho, Nam Gyu | ko |
dc.contributor.author | Cho, Pyeong-Seok | ko |
dc.contributor.author | Kim, Il-Doo | ko |
dc.contributor.author | Saltsburg, Howard M. | ko |
dc.contributor.author | Tuller, Harry L. | ko |
dc.date.accessioned | 2013-03-12T16:52:50Z | - |
dc.date.available | 2013-03-12T16:52:50Z | - |
dc.date.created | 2012-10-29 | - |
dc.date.created | 2012-10-29 | - |
dc.date.issued | 2012-08 | - |
dc.identifier.citation | SENSORS AND ACTUATORS B-CHEMICAL, v.171, pp.1166 - 1171 | - |
dc.identifier.issn | 0925-4005 | - |
dc.identifier.uri | http://hdl.handle.net/10203/102921 | - |
dc.description.abstract | The response characteristics of amorphous-InGaZnO4 (a-IGZO(4)) thin films toward reducing/oxidizing gases (H-2/NO2), at sensor operating temperatures, are reported for the first time. The lack of grain boundaries eliminates a major source of electrical, microstructural and chemical inhomogeneities associated with polycrystalline semiconducting metal oxides (SMOs), rendering a-IGZO(4) a highly promising model sensor system. Gas sensor tests were carried out in the temperature range of 200-400 degrees C by monitoring changes in DC resistance during cyclic exposure to trace concentrations (between 1.25 and 50 ppm) of H-2 or NO2 in dry air. The response (S) to H-2 was found to go through a temperature maximum (e.g. S similar to 0.7 at 350 degrees C for pH(2) = 12.5 ppm) that value being a function of pH(2). The response to NO2, on the other hand, decreased with increasing temperatures with the highest recorded values at 200 degrees C (e.g. S similar to 33 at 200 degrees C for pNO(2) = 5 ppm). The response followed an approximate power law dependence on gas partial pressure (p), S = Ap(beta), with beta taking on values of similar to 0.5-1.0 as temperature increased from 200 to 400 degrees C. Response times were found to range from 10 s to greater than 1000 s as temperature decreased. The hysteretic behavior exhibited by a-IGZO films between 150 and 400 degrees C, under temperature sweep conditions, is attributed to kinetically limited adsorption/desorption and reaction rates. (C) 2012 Elsevier B.V. All rights reserved. | - |
dc.language | English | - |
dc.publisher | ELSEVIER SCIENCE SA | - |
dc.subject | OXIDE SEMICONDUCTORS | - |
dc.subject | GRAIN-SIZE | - |
dc.subject | SENSITIVITY | - |
dc.subject | TRANSISTORS | - |
dc.subject | ATMOSPHERE | - |
dc.subject | SURFACE | - |
dc.subject | LAYERS | - |
dc.subject | MODEL | - |
dc.title | Amorphous InGaZnO4 films: Gas sensor response and stability | - |
dc.type | Article | - |
dc.identifier.wosid | 000308572700154 | - |
dc.identifier.scopusid | 2-s2.0-84864276859 | - |
dc.type.rims | ART | - |
dc.citation.volume | 171 | - |
dc.citation.beginningpage | 1166 | - |
dc.citation.endingpage | 1171 | - |
dc.citation.publicationname | SENSORS AND ACTUATORS B-CHEMICAL | - |
dc.identifier.doi | 10.1016/j.snb.2012.06.057 | - |
dc.contributor.localauthor | Kim, Il-Doo | - |
dc.contributor.nonIdAuthor | Yang, Dae Jin | - |
dc.contributor.nonIdAuthor | Whitfield, George C. | - |
dc.contributor.nonIdAuthor | Cho, Nam Gyu | - |
dc.contributor.nonIdAuthor | Cho, Pyeong-Seok | - |
dc.contributor.nonIdAuthor | Saltsburg, Howard M. | - |
dc.contributor.nonIdAuthor | Tuller, Harry L. | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | Semiconducting metal oxides | - |
dc.subject.keywordAuthor | Hydrogen gas sensor | - |
dc.subject.keywordAuthor | NOx gas sensor | - |
dc.subject.keywordAuthor | Amorphous semiconductor | - |
dc.subject.keywordPlus | OXIDE SEMICONDUCTORS | - |
dc.subject.keywordPlus | GRAIN-SIZE | - |
dc.subject.keywordPlus | SENSITIVITY | - |
dc.subject.keywordPlus | TRANSISTORS | - |
dc.subject.keywordPlus | ATMOSPHERE | - |
dc.subject.keywordPlus | SURFACE | - |
dc.subject.keywordPlus | LAYERS | - |
dc.subject.keywordPlus | MODEL | - |
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