Influence of Vacuum on Nano-Diamond Cathode Field Emission Characteristics

Abstract:

The test of nano-diamond cathode field emission characteristics was conducted by changing the vacuum, the influence of vacuum change on nano-diamond field emission characteristics was also explored. It was found that under the condition of low vacuum, nano-diamond field emission turn-on field is relatively high, as the vacuum increases, turn-on field decreases gradually, and current density increases. When system vacuum reaches to above 10^-4 Pa level, turn-on field becomes stable, the stable value is 4.5 V/μm; and current density also becomes stable, the stable value is 117 μA/cm²; the luminescence effect of anode which is 200μm distant from the cathode in the vacuum chamber also becomes stable. Results show that 10^-4 Pa is system vacuum limit parameter of stable working of field emission display, the experiment provides a basis to the design and manufacture of nano-diamond field emission display.

• Periodical: Applied Mechanics and Materials (Volumes 633-634)
• Pages: 21-24
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.633-634.21
• Online since: September 2014
• Authors: Yan Ning Yang, Zhi Yong Zhang, Wei Xia Li, Chun Xue Zhai, Qiao Ping Liu, Fu Chun Zhang
• Keywords: Current Density, Field Emission, Nanodiamond, Turn-on Field, Vacuum

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