Surface-conducted field emission lamp with ZnO nanotetrapod and magnesium oxide composite emitter

With all the advantages of the FED, surface conduction electron emission display (SED), which is developed by the Canon-Toshiba with a 36 inch diagonal, has additional superiorities compared to the foregoing displays as better brightness, power consumption and response time.Surface conduction emission is a planar-triode configuration field emission, which refers to electron emission from a roughed emitter-film that locates between the gate electrode and cathode electrode. When a voltage is applied between the gate and cathode, there is current flow in the emitter-layer, where electrons can be easily scattered and extracted by the counter anode. As the Canon-Toshiba described the surface-conducted field emission cathode for surface conduction electron emission display (SED) is formed by application of applying PdO thin films produced by an ink -jet process on a glass substrate. The nanogap which is crucial in the electron emission is fabricated across the PdO films. However, surface-conduction emission display (SED) has great promise for a number of applications, the electron beams formed by these devices are poorly utilized which limits their use for certain applications. This article describes an approach to promoting the emission efficiency and anode current by using a composite emitter.