Investigation On The Preparation Of Nano-diamond Field Emission Cathode By Electrophoretic Deposition

Field emission displays (FED) with all the advantages of CRT and flat panel displays (FPD), have great potential to become the mainstream device of next-generation displays. The FED with diamond as the material of the field emission cathode has huge superiority in many aspects. Currently, the research of diamond field emission cathode has becoming one of the important investigative directions of the FED fields.The thesis supposed Ti-based nano-diamond coating field emission cathode (FEC) for the purpose of exploring a simple, effective and good performance diamond FEC which is suited to fabricate large-area FED. The cathode has been formed as Ti-TiC-diamond structure through a procedure as solution preparation—electrophoretic deposition—thermal bonding treatment—hydrogen plasma treatment.According to the orthogonal experimental principle, several groups of experiments have been designed and conducted. The effect of technological parameters on the performance of the samples has been discussed, combined with the morphology and lighting feature of the samples, optimal technological parameters have been determined. The field emission (FE) properties have been promoted by means of hydrogen plasma treatment, and the plasma treatment technological parameters have been optimized.The influence of temperature and vacuity on FE properties of the Ti-based nano-diamond coating field emission cathode has been investigated, the device's stable work extents of temperature and vacuity has been achieved. The works laid foundation for further study and exploitation of cathode properties improving, work extents extending and device designing.The ingredient and surface feature of the samples are characterized by XRD, Raman, SEM and AFM, combined with the measuring and analyzing of the FE properties of those samples, the reasons which led to different FE properties of samples prepared in different technological conditions have been explained. These works provide powerful experimental and theoretical foundations for exploring preferable field emission cathode.