Tunable field emission characteristics of ZnO nanowires coated with varied thickness of lanthanum boride thin films

C X Zhao; Y F Li; Jun Chen; S Z Deng; N S Xu

doi:10.1016/j.ultramic.2012.12.008

Tunable field emission characteristics of ZnO nanowires coated with varied thickness of lanthanum boride thin films

Ultramicroscopy. 2013 Sep:132:36-40. doi: 10.1016/j.ultramic.2012.12.008. Epub 2012 Dec 12.

Authors

C X Zhao¹, Y F Li, Jun Chen, S Z Deng, N S Xu

Affiliation

¹ 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.

PMID: 23298537
DOI: 10.1016/j.ultramic.2012.12.008

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.

Keywords: Coating; Field emission; Interface; Tunneling.

Publication types

Research Support, Non-U.S. Gov't