Preparation and Investigation of Efficient-Electron-Emitting Cathodes-Filaments Coated with Metal Oxide Complexes
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Static electricity often occurs in mass production of advanced electrical and electronic products such as organic light-emitting diodes, quantum dot displays (QLED), semiconductors and optolelctronic thin film. In this study, a highiy electron emitting cathode was fabricated to remove the electrostatic charge. The metal oxide cathodes were prepared by introducing metal chlorides forms of three different metals (Gd, Eu, and Nd) into the typical metal oxide (Ca-Sr-Ba) emitter. The viscosity of the solution was increased by mixing a binder nitrocellulose so that it could coincer uniformly on the coils. Compared to the typical emitters all three metal emitters showed larger enhancement in their electron emissions. In particular, the oxid containing the neodymium oxide as 15 mole% demonstrated the largest performance among them. It was confirmed that the cathode system containing Nd rather than Gd, Eu has excellent electron emitting properties.