金刚石粉末淀积层的场发射特性研究  

Field Emission Characteristics of the Diamond Powder

作　　者：周江云[1] 徐静芳[1] 茅东升[2] 柳襄怀[2] 

机构地区：[1]上海华东师范大学电子科学技术系,上海200062 [2]中国科学院上海冶金研究所离子束开放实验室,上海200050

出　　处：《发光学报》2000年第4期330-333,共4页Chinese Journal of Luminescence

基　　金：国家自然科学基金资助!(6 96 710 11)

摘　　要：采用电镀方法和直接刷涂的方法在钨针衬底和硅衬底上沉积高压合成的金刚石粉末形成冷阴极。将这种冷阴极与荧光阳极组成真空二极管结构。通过该结构电流 电压特性的测量和发光特性的观察研究了金刚石粉末冷阴极的电子场发射性能。实验显示 ,这些冷阴极都具有很高的电子发射能力 ,最低开启场强达到3 2 5V/μm。Electroplating and direct brushing technique were used to deposit commercial HTHP diamond powder on W needles and Si substrates to form cold cathodes.These cold cathodes combined with phosphor anodes constructed testing vacuum diodes.By measuring current voltage characteristics and observing light emission of these diodes,electron emission feature of these diamond powder cold cathodes were investigated.Experiments show that,these cold cathodes have good electron emission ability,the minimum threshold field is 3 25V/μm.Thermal electric positive feed back and conductivity modulation effects were proposed to interpret the phenomenon of random distribution of electron emission sites.

关 键 词：金刚石粉末 场发射 电导调制效应 热电正反馈 电镀法 直接刷涂法 点状场发射 冷阴极制备技术 

分 类 号：O462.4[理学—电子物理学]