The study of a tetrapod-like nanostructure ZnO field emission display

A tetrapod-like ZnO nanostructures prepared by hyperthermia vapour phase oxidation process were used as the field emission cathode material. The field emission cathode panel prototype is fabricated with ZnO slurry printed and sintered. We packed the cathode panel and the fluorescence panel on which was printed with phosphor power as a 5 inch field emission display of diode structure. The field emission experiments were done and the panel realized stable field emission, it could display simple characters. The turn-on electric field of diode structure ZnO-FED is 1.5 V/mum. When the electric field reaches 5.3 V/mum, the emission current density can approach to 5.11muA/cm
²
. We had obtained the electric field enhance factor about 6772 by the experiment. It has shown from the experimental results that tetrapod-like ZnO nano-material has good electron emission performance and it is also a beautiful field emission cathode material.