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/lm (j(T¼473 K) ¼ 190 lA/cm2, j(T¼300 K)¼114 lA/cm2) was observed together with a reduction of the turn-on field from 552 V/lm to 482 V/lm. 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.

Ulisse, G., Brunetti, F., Vomiero, A., Natile, M., Sberveglieri, G., DI CARLO, A. (2011). Hybrid thermal-field emission of ZnO nanowires. APPLIED PHYSICS LETTERS, 99(24), 243108-243108-4 [10.1063/1.3670331].

Hybrid thermal-field emission of ZnO nanowires

BRUNETTI, FRANCESCA;DI CARLO, ALDO
2011-01-01

Abstract

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/lm (j(T¼473 K) ¼ 190 lA/cm2, j(T¼300 K)¼114 lA/cm2) was observed together with a reduction of the turn-on field from 552 V/lm to 482 V/lm. 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
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore ING-INF/01 - ELETTRONICA
English
Con Impact Factor ISI
Ulisse, G., Brunetti, F., Vomiero, A., Natile, M., Sberveglieri, G., DI CARLO, A. (2011). Hybrid thermal-field emission of ZnO nanowires. APPLIED PHYSICS LETTERS, 99(24), 243108-243108-4 [10.1063/1.3670331].
Ulisse, G; Brunetti, F; Vomiero, A; Natile, M; Sberveglieri, G; DI CARLO, A
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/104514
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