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Hybrid thermal-field emission of ZnO nanowires
University of Rome Tor Vergata.
University of Rome Tor Vergata.
SENSOR Lab, Department of Chemistry and Physics, Brescia University and CNR-IDASC.ORCID iD: 0000-0003-2935-1165
CNR-ISTM.
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2011 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 99, no 24, article id 243108Article in journal (Refereed) Published
Abstract [en]

The electron emission properties of an array of ZnO nanowires were studied in the temperature range of 300-473 K. An almost doubling of the current density at 473 K under an electric field of 8 V/μm (j (T=473 K) = 190 μA/cm 2, j (T=300 K) = 114 μA/cm 2) was observed together with a reduction of the turn-on field from 552 V/μm to 482 V/μm. Theoretical model that combines the thermal-field emission for high electric field and the Schottky emission for the low field can satisfactorily account for temperature dependence of current at low as well as at high applied bias. The obtained effect is particularly appealing for the application in micro-gun for THz vacuum tubes. © 2011 American Institute of Physics.

Place, publisher, year, edition, pages
2011. Vol. 99, no 24, article id 243108
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Experimental Physics
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URN: urn:nbn:se:ltu:diva-10639DOI: 10.1063/1.3670331Scopus ID: 2-s2.0-83755173267Local ID: 979012cf-67e0-4e96-8fcd-e762fabb5a9cOAI: oai:DiVA.org:ltu-10639DiVA, id: diva2:983584
Note

Upprättat; 2011; 20141117 (albvom)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2019-08-16Bibliographically approved

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Vomiero, Alberto

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