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 flat 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 flat panel display areas were also introduced.
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