NDLI: Field emission performance of nanostructured carbon films

Content Provider	IEEE Xplore Digital Library
Author	Carta, S. Rossi, M.C. Conte, G. Ralchenko, V.
Copyright Year	2009
Description	Author affiliation: Elect. Eng. Dept., IFN and CNISM, University of Roma Tre, Via della Vasca Navale 84, Rome, Italy (Rossi, M.C.; Conte, G.) \|\| Istituto di Fotonica e Nanotecnologie, Consiglio Nazionale delle Ricerche, Rome, Italy (Carta, S.) \|\| Physics Institute, RAS, Vavilova ul. 38, 119991 Moscow, Russia (Ralchenko, V.)
Abstract	The field emission performance of n-type NCD films with different composition and nanostructure is investigated in detail by analyzing the different role played by composition, grain size and orientation in the attempt to identify the material better suited for cold emitters realization in terms of low voltage operation, current driving capability and stability. Different configurations of collecting electrodes are employed to verify the occurrence of nitrogen induced morphology changes and partial orientation into elongated in plane diamond domains. By increasing nitrogen content up to N=25% the threshold field for an electron emission current density of 1µA/mm decreases from 25 $Vµm^{−1}down$ to 11 $Vµm^{−1}.$ In addition, by comparing the field emission performance achieved for the sample with N=25% using planar and vertical electrode arrangements, a further reduction of threshold electric field from 11 to 7.5 $Vµm^{−1}$ and much higher emission current density (up to 50 $mA/cm^{2})$ are found, without showing fatigue effects after prolonged emission. Thanks to the composition and to the orientation of carbon emission sites, the N=25% UNCD film then appears the elective material for the realization of stable cold cathodes.
Starting Page	265
Ending Page	266
File Size	535263
Page Count	2
File Format	PDF
ISBN	9781424435005
DOI	10.1109/IVELEC.2009.5193532
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-04-28
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Carbon dioxide Composite materials Electrodes Nitrogen Current density Performance analysis Grain size Nanostructured materials Low voltage Stability analysis nanostructured carbon field emission
Content Type	Text
Resource Type	Article

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