Luminescent Rule of Carbon Nanotubes Field Emission Display

A carbon nanotubes cathode was prepared by chemical vapor deposition (CVD) method on silicon substrate, and a field emission display with the carbon nanotubes cathode was fabricated by the vacuum-fluorescent-display-like package processes. Both the power supply voltage and the device voltage were measured at the same time. Very ideal current-voltage characteristic and luminance - voltage characteristic of the carbon nanotubes-field emission display (CNT-FED) are obtained for device voltage. It is found that substituting power supply voltage for device voltage is unreasonable. Compared with the luminance-voltage curve and the luminance-power curve, the luminance-current curve is better linear. Theoretical analysis showed that the reasons are the inner resistance of the CNT-FED consumes electric energy and real voltage change between the cathode and the anode of CNT-FED is very small after electrons emit. Hence, we prefer to describe the characteristic of CNT-FED by luminance-current linear relationship, which is advantageous to device test and design.