Field emission of MgO-coated graphene sheets prepared by electrophoretic deposition

被引：7

作者：

Long, Yaping ^{[1
]}

Zeng, Baoqing ^{[1
,2
]}

Liu, Jianlong ^{[1
]}

Yang, Yun ^{[1
]}

Li, Nannan ^{[1
]}

Wu, Zhe ^{[1
]}

机构：

[1] Univ Elect Sci & Technol China, Sch Phys Elect, Chengdu 610054, Peoples R China

[2] Univ Elect Sci & Technol China, Zhongshan Inst, Dept Elect Engn, Zhongshan 528402, Peoples R China

来源：

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B | 2015年 / 33卷 / 01期

基金：

芬兰科学院;

关键词：

SINGLE-LAYER GRAPHENE; CARBON NANOTUBE; FILMS;

D O I：

10.1116/1.4905094

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Improvements in field emission (FE) of graphene sheets were demonstrated by radio frequency magnetron sputtering with magnesium oxide (MgO). Following MgO coating, the turn-on field of graphene sheets is decreased from 6.3 to 3.8 V/mu m, and the threshold field is decreased from 9 to 6.5 V/mu m. The deposited MgO nanoparticles not only decrease the turn-on field but also enhance the tolerance ability of graphene sheets to various pressure conditions. Field emission stability measurements indicated better lifetime and field emission stability for MgO-coated graphene emitter. Meanwhile, atomic force microscopy, scanning electron microscopy, transmission electron microscope, and x-ray photoelectron spectroscopy were used to analyze the influence of MgO. This study presents an effective method of depositing wide-bandgap oxides on graphene emitters to improve the FE properties of graphene. (C) 2014 American Vacuum Society.

引用

页数：6

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