碳纳米管的场致发射及在平板显示领域中的应用

Field Emission of Carbon Nanotubes and Application in Flat Panel Display Field

碳纳米管(CNTs)具有低的阈值电场和高的发射电流密度,是一种性能优良的场发射阴极材料,在平板显示领域具有潜在的应用价值．CNTs的场发射性能直接关系到CNTs场发射阴极在未来的实际应用．本文从Fowler-Nordheims场发射理论出发,阐述了CNTs的场发射机制;详细论述了各种因素包括CNTs的定向性、层结构、几何特征、阵列密度、系统真空度以及CNTs与基底材料之间的键合等对CNTs场发射特性的影响;介绍了CNTs场发射特性在平板显示领域中的实际应用．

Carbon nanotubes （CNTs） are excellent field emission cold cathode materials. They have a low threshold electric field and a high emission current density which make them attractive for potential application in fiat panel display. In this paper, the Fowler-Nordheims theory and other mechanisms of CNTs field emission were clarified; The effects on field emission characteristics of CNTs by different factors, such as the structure of CNTs （MWNT versus SWNT）, the orientation, geometrical structure, density of the CNTs arrays, the interaction of CNTs with the supporting suface and the environmental condition and so on, were discussed in detail; The practical applications of field emission characteristics from CNTs in fiat panel display areas were also introduced.