Transport and field emission in carbon nanotube - polymer composite cathodes

Abstract

In this study, arc discharge multiwall carbon nanotubes have been incorporated into PmPV polymer, a derivative of the conjugated polymer PPV. Electron field emission characterisation was made as a function of nanotube mass fraction using large area phosphor coated anode. It is concluded that emission occurs at front surface under the action of applied field. As the mass fraction of nanotubes is increased, a greater density of nanotube-nanotube contacts is made, increasing the overall charge transport of carriers via FIT. Replenishment of the electrons occurring by a percolation controlled charge transport through the disordered nanotube network.