Conditioning of vertically aligned reduced graphene oxide film electron emitter for terahertz vacuum electronic devices
IRMMW-THz 2015 - 40th International Conference on Infrared, Millimeter, and Terahertz Waves
Baek I.-K., Bhattacharya R., Lee J.S., Kim S., Hong D., Ohjoon K., Kim Y.H., Park G.-S.
Abstract
The field emission from the edge of vertically aligned reduced graphene oxide (rGO) film was examined experimentally. High current (I > 5 mA) and high emission current density (J > 100 A/cm2) was obtained using diode configuration. The thermal runaway of sharp protrusions on emission edge are considered to be source for the destructive vacuum breakdowns due to high local emission current. A remarkable field emission stability was achieved using processed field induced evaporation, by removing the protrusions and recovering the totally field emission attributed I-V characteristics. © 2015 IEEE.