Abstract: Field emission properties of colloidal graphite were investigated. The electric fields for extracting 10μA/cm² and 1mA/cm² current densities were measured to be about 5.4 and 8.8V/μm, respectively. Morphologic image of the colloidal graphite film was obtained using a scanning electron microscope. The Fowler-Nordheim model was used to analyze the obtained results. The enhancement factor of electric field was calculated to be about 4×10².

Key words: Field emission, colloidal graphite, flat panel display

摘要： 研究了胶体石墨涂层的场发射特性。测得其相应于10μA/cm²场发射电流密度的开启场强为5.4V/μm，相应于1mA/cm²场发射电流密度的阈值场强为8.8V/μm。扫描电子显微镜观察表明场发射应该来自细小石墨碎片的尖锐边缘。通过计算估计出这些尖锐边缘处的场强比阴阳极之间的平均场强增加了大约4×10²倍。

关键词: 场发射, 胶体石墨, 平板显示器