State Key Laboratory of Gansu Advanced Non-Ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, China; School of Science, Lanzhou University of Technology, Lanzhou 730050, China
Abstract:
A hexagon pitch carbon nanotube (CNT) array vertical to
the normal gate of cold cathode field emission displayer (FED) is
simulated by solving the Laplace equation. The calculated results
show that the normal gate causes the electric field around the CNT
tops to be concentrated and emission electron beam become a column.
The field enhancement factor and the emission current intensity step
up greatly compared with those of diode structure. Emission current
density increases rapidly with the decrease of normal-gate aperture.
The gate voltage exerts a critical influence on the emission
current.