场发射显示器环境下不同置向碳纳米管的尖端电场强度计算

针对碳纳米管场发射显示器的实际工作环境,计算给出了碳纳米管在垂直、与垂直碳纳米管等长倾斜45°和与垂直碳纳米管等高倾斜45°放置3种情况下的空间电势分布和电场分布,数值计算表明在上述3种情况下的碳纳米管尖端表面附近的电场强度比值约为13:10:12。进一步分析说明在垂直和倾斜碳纳米管同时存在的情况下,要提高电子发射的均匀性,就必须提高倾斜碳纳米管的高度。

Calculations of Electric Field to Different Setting Direction of Carbon Nanotubes Tip

In view of actual environment of carbon nanotubes-field emission display,the electric field and electric potential distribution of single vertical carbon nanotube,including 45o with the same length of the vertical one and 45o with the same height,are calculated respectively.The results indicate that the electric field intensity's ratio for the three types of carbon nanotubes is about 13 : 10 : 12.The further analysis shows that if the uniformity of field emission is desired to obtain improvement,the height of inclining carbon nanotubes should be increased on condition that the vertical and inclining carbon nanotubes exist simultaneously in the cathode of field emission display.