Atomic layer coating of hafnium oxide on carbon nanotubes for high-performance field emitters | Zendy

Young Il Song | Zendy; CheolMin Yang | Zendy; Lee Ku Kwac | Zendy; Hong Gun Kim | Zendy; Yoong Ahm Kim | Zendy

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Atomic layer coating of hafnium oxide on carbon nanotubes for high-performance field emitters

Author(s) -

Young Il Song,

CheolMin Yang,

Lee Ku Kwac,

Hong Gun Kim,

Yoong Ahm Kim

Publication year - 2011

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.3650471

Subject(s) - hafnium , carbon nanotube , materials science , field electron emission , work function , fermi level , oxide , current density , optical properties of carbon nanotubes , coating , layer (electronics) , electron , nanotube , nanotechnology , metallurgy , zirconium , physics , quantum mechanics

Carbon nanotubes coated with hafnium oxide exhibit excellent electron emission characteristics, including a low turn-on voltage, a high field enhancement factor, and exceptional current stability. Their enhanced emission performance was attributed to a decrease in the work function and an increase in the electron density of states at the carbon nanotube Fermi level closest to the conduction band minimum of hafnium oxide. In addition, the enhanced current stability was attributed to the ability of hafnium oxide to protect the carbon nanotubes against ions and free radicals created in the electron field emission process.

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