| Summary: | 碩士 === 國立成功大學 === 電機工程研究所 === 85 ===
Blue CRT phosphor of ZnS: Ag,Cl is tried to use as luminescent material of Field Emission display in this study. The conductivity of phosphor layers is more serious in FEDs than in CRTs because of the low work voltage and high current density in FEDs. Therefore, proper conductive treatment is necessary for phosphor in FEDs.
The phosphor layers are grown on ITO glass substrate by sedimentation. In this study, it is found that phosphor layers grown on ITO glass substrate have similar single crystal construction. And obtained optimum growth conditions are that the electrolyte concentration is at 3.75×10-2%, the binder concentration at 2.5%, and the phosphor weight at 2 mg/cm2.
In the way of conductive treatment, it is found that coating temperature is very important factor than coating time and concentration. The oxidization occurs at 90℃ with above coating time of half an hour. And in our measuring conditions, the luminance increases with the increase of coating solution concentration when temperature of conductive layers forming is at room temperature; but when temperature is at 90℃, the luminance decreases the increase of coating solution concentration. Besides, mixture with conductive powders In2O3 is able to improve the luminance, efficiency and stability of phosphor layers. And by proper heat treatment, the luminance of phosphor layers also increases effectively. The CIE of phosphor by conductive treatment measured in this study is X＝0.1241, Y＝0.0641.
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