涂布法制备碳纳米管场发射阴极及其性能的研究  

Spreading Technique and Performance of Field Emission Cathode Made of Powder Carbon Nanotubes

作　　者：冯涛[1] 柳襄怀[1] 王曦[1] 李琼[2] 徐静芳[2] 诸玉坤[2] 

机构地区：[1]中国科学院上海微系统与信息技术研究所离子束开放研究实验室,上海200050 [2]华东师范大学电子科学与技术系,上海200062

出　　处：《发光学报》2002年第4期406-408,共3页Chinese Journal of Luminescence

基　　金：国家自然科学基金资助项目(59972039);国家973计划资助项目(G2000067207-2)

摘　　要：碳纳米管（CNT）作为场发射阴极（FEC）具有很好的性能。报导了利用粉末状碳纳米管制作CNT-FEC的方法,包括涂布方法、纯化方法和表面处理方法。主要关心的FEC性能为电子发射均匀性、电流密度和寿命。Carbon naontubes(CNT) have excellent electron emission performance as field emission cathode (FEC). In this paper, the method of fabrication FEC with powder CNT, including of affixing, purifying and surface treating, has been reported. The major performance of the most concern are the uniformity of electron emission, current density and lifetime. The raw materials CNT were ground with little balls in alcohol suspension, then were dropped on metal substrate. After hydrogen plasma surface treatment, electron field emission properties of these CNT cathodes were studied using a diode structure with phosphor-coated ITO transparent anode. The results showed that the threshold field is less than 3V/μm; emission site density was about 104/cm2; the emission current density was 1mAl/cm2 at an electric field of 4.4V/μm and the lifetime was more than 800h.

关 键 词：涂布法 制备 场发射阴极 碳纳米管 FEC 

分 类 号：O462.4[理学—电子物理学] TN105[理学—物理]