Field emission device having field emitter including photoelectric material and method of manufacturing the same

A field emission device comprising:

• an anode electrode provided with a counter layer;
• a cathode electrode spaced from the anode electrode and provided with a field emitter facing the counter layer;
• and
• a first photoelectric material layer provided between the cathode electrode and the field emitter,
• wherein the field emitter comprises:
• a field emission paste formed by melting and curing a photoelectric material and metal particles;
• and
• a carbon nanotube provided on the field emission paste and projecting from the field emitter toward the anode electrode,
• wherein cold electron emission caused by a field effect is generated from the carbon nanotube, and
• wherein photo electron emission caused by incident light is generated from the photoelectric material.

A method of manufacturing a field emission device, comprising:

• forming a carbon nanotube paste, which consists of carbon nanotubes, a photoelectric material, metal particles, an organic binder, and a solvent, on a cathode electrode;
• removing the solvent by drying the carbon nanotube paste;
• removing the organic binder by firing the carbon nanotube paste and melting the photoelectric material and the metal particles;
• and
• treating a field emitter formed by melting the photoelectric material and the metal particles to allow a surface of the field emitter to be activated,
• wherein the photoelectric material comprises a material having a lower critical frequency than a frequency of light incident on the field emitter.