Comparison of emission characteristics of molybdenum and tungsten field emitter using the S-K chart

In this paper, we compare the field emitters of molybdenum and tungsten close to the work function using Seppen-Katamuki (S-K) chart. The work functions of the emitters of Mo and W are about the same as calculated by using the Fowler-Nordheim (F-N) plot, but the emission current characteristic by the field emission is obviously smaller for the Mo emitter. Therefore, the characteristics of Mo and W emitters are compared using S-K chart, it was found that there is a clear difference.