碳纳米管场发射阴极的制备及其场发射特性  

Fabrication and field emission characteristic of carbon nanotubes field emission cathode

作　　者：吕文辉[1,2] 宋航[1] 金亿鑫[1] 魏燕燕[1,2] 郭万国[1,2] 曹连振[1,2] 陈雷锋[1,2] 赵海峰[1] 李志明[1] 蒋红[1] 缪国庆[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所激发态重点实验,长春130033 [2]中国科学院研究生院,北京100039

出　　处：《功能材料与器件学报》2008年第6期983-987,共5页Journal of Functional Materials and Devices

基　　金：国家973计划资助(2003CB314702);国家自然科学基金资助项目(6057100490406024)

摘　　要：采用电泳法将碳纳米管组装到电化学淀积的银台阵列上作为场发射阴极并研究了它的场发射特性。场发射特性测试结果表明:该阴极具有优异的场发射特性,开启电场为2.8V/μm,在应用电场为5.5V/μm时,发射电流密度达到1.7mA/cm2。具有优异的发射性能的原因可以归结到银台的边缘和银台类山状的表面增强了碳纳米管的场致电子发射。该阴极制备工艺简单、发射特性优异,且容易实现大面积制备,可以应用到大面积场发射显示器件中。An efficient carbon nanotubes （CNTs） field emission cathode has been successfully fabricated by combining electrophoresis and by electrochemical deposition technology. In fabrication, the silver patterns are deposited on an indium tin oxide glass by electrochemical method and then the CNTs are covered onto surface of the silver patterns by electrophoretic method. The cathode shows that excellent field emission characteristic, including a turn - on electric field of 2. 8V/μm and an emission current density of 1. 692mA/cm2 at an applied electric field of 5.5V/μm. The excellent field emission characteristic may be attributed to that surface electric field of CNTs are enhanced by edge and hills - like surface of silver pattern. The cathode is a promising candidate for large scale carbon nanotubes based field emission display, due to its simple fabrication processes and excellent field emission characteristic.

关 键 词：碳纳米管 场发射阴极 银台阵列 电泳淀积 电化学淀积 

分 类 号：O462.4[理学—电子物理学]