title: Tunable field emission characteristics of ZnO nanowires coated with varied thickness of lanthanum boride thin films.
abstract: Lanthanum boride (LaB(x)) thin films with various thicknesses were deposited on ZnO nanowire arrays by electron beam evaporation. Field emission characteristics of ZnO nanowires show close dependence on LaB(x) coating thickness. The turn-on field increases with increasing LaB(x) coating thickness from 10 nm to 50 nm. The observed phenomena were explained by a model that the tunneling at ZnO/LaB(x) interface dominates the emission process.
authors.affiliation: State Key Laboratory of Optoelectronic Materials and Technologies, Gongdong Province Key Laboratory of Display Material and Technology, School of Physics and Engineering, Sun Yat-sen University, Guangzhou 510275, Guangdong, People's Republic of China.
authors.forename: C X
authors.initials: CX
authors.lastname: Zhao
authors.forename: Y F
authors.initials: YF
authors.lastname: Li
authors.forename: Jun
authors.initials: J
authors.lastname: Chen
authors.forename: S Z
authors.initials: SZ
authors.lastname: Deng
authors.forename: N S
authors.initials: NS
authors.lastname: Xu
keywords: Coating; Field emission; Interface; Tunneling