摘要
碳纳米管是一种性能优良的场发射冷阴极材料,具有低的阈值电场和高的发射电流密度,在平板显示领域具有广阔的应用前景。本文从Fow ler-Nordhe im s场发射理论出发,阐述了CNT的场发射机制,详细论述了包括CNT的结构、方向性、阵列密度、吸附气体、工作环境等诸多因素对其场发射特性的影响。研究表明,垂直取向,长径比高,密度适中,表面洁净的CNT场增强因子较大,场发射性能较好。
The carbon nanotube （CNT） is a kind of cold cathode material with excellent field emission performance. It has a low threshold electric field and a high emission current density which make it attractive for the potential application in the flat panel display. The Fowler-Nordheims theory and the mechanism of CNT field emission are clarified in this paper. The effects on field emission characteristics of CNT by different factors, such as the structure of CNT, the orientation, structure, density of the CNT arrays, adsorbed gas,work environment and so on, are discussed in detail. Result shows that CNT arrays can have a sufficient field enhancement and excellent field emission performance as which is of vertical alignment, high ratio of length to diameter, moderate density and clean surface.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2006年第3期573-579,555,共8页
Journal of Synthetic Crystals
基金
天津市自然科学基金重点资助项目(No.05YFJZJC00200)
关键词
场发射
冷阴极
平板显示
F-N理论
碳纳米管
field emission
cold cathode
flat panel display
F-N theory
carbon nanotube
