Abstract
Diamond-like carbon (DLC) films and nitrogen-doped DLC (N-DLC) films were deposited on a molybdenum-coated ceramic substrate using the pulsed laser deposition technique. The structure and surface morphology of the films were examined using X-ray diffraction, Raman spectroscopy, Auger electron spectroscopy and scanning electron microscopy. Field emission measurements were carried out, with the DLC or the N-DLC films as the cathode and ITO-coated glass as the anode. The field emission measurements indicated that the nitrogen doping could lower the turn-on field and increase the current density. It was believed that the interface at the molybdenum–N-DLC film plays an important role in improving the field emission performance of the N-DLC film.
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