Effect of Liquid Surface Treatments on Field Emission Properties of Carbon Nanotube Cathodes

  • Lee, Ji-Eon (School of Materials Science and Engineering, Pusan National University) ;
  • An, Young-Je (School of Materials Science and Engineering, Pusan National University) ;
  • Shin, Heon-Cheol (School of Materials Science and Engineering, Pusan National University) ;
  • Chung, Won-Sub (School of Materials Science and Engineering, Pusan National University) ;
  • Cho, Young-Rae (School of Materials Science and Engineering, Pusan National University)
  • Published : 2007.08.27

Abstract

Carbon nanotube (CNT) cathodes having a trench structure similar to the structure of the gated triodetype cathode were successfully fabricated by a screenprinting method with multi-walled carbon nanotubes. We observed that a liquid method not only readily removes the organic residues on the CNT films, but also satisfactorily protrudes the CNTs out of the electrode surface. The CNT cathodes prepared by the liquid method showed a turned-on field of $1.4\;V/{\mu}m$. The emission current density of them was about $3.1\;mA/cm^2$ at the electric field of $3\; V/{\mu}m$. The liquid method appears to be a promising surface treatment of CNT cathode for gated triode-type FEDs applications.

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