SUN Jian-ping, ZHANG Zhao-xiang, HOU Shi-min, et al. Work Function of Tungsten Carbide Thin Film Calculated Using Field Emission Microscopy[J]. Acta Electronica Sinica, 2002, 30(5): 655-657.
SUN Jian-ping, ZHANG Zhao-xiang, HOU Shi-min, et al. Work Function of Tungsten Carbide Thin Film Calculated Using Field Emission Microscopy[J]. Acta Electronica Sinica, 2002, 30(5): 655-657.DOI:
a thin film of tungsten carbide is formed on the surface of tungsten tip of field emission microscopy after certain annealing treatment.Typical field emission patterns of tungsten carbide thin film is observed
and its I-V behavior and Fowler-Nordheim plot is measured.Using transmission electron microscopy
we measure the curvature radius of emission tip
and estimate the ratio factor β with an empirical formula
then calculate the work function φ of tungsten carbide thin film to be 3.79eV according to Fowler-Nordheim formula.