Influence of Temperature and Vacuum on Nano-Diamond Filed Emission

In order to obtain the stabilized operating temperature and vacuum of nano-diamond filed emission display, the influence of temperature and vacuum changes on nano-diamond filed emission was studied, and the mechanism of field emission under high temperature and low vacuum was analyzed. It was found that nano-diamond filed emission turn-on filed decreases, and current density increases as the temperature increases. After the temperature increases to 130°C, filed emission starts to deviate from the traditional Fowler-Nordheim theory. Under low vacuum, nano-diamond field emission is very unstable. As the vacuum increases, turn-on filed decreases, and current density increases. However, when the vacuum increases to 10^-4 Pa level, turn-on filed, current density, and luminescence effect becomes stable. vacuum can decrease with the increase of temperature. When the temperature is below 150°C, the decrease of the vacuum will not influence the stability of field emission. When the system operates stably, the temperature of cathode surface should be below 130°C, and the vacuum should be above 10^-4 Pa level.