In this paper we report the fabrication and testing of diode-type low-voltage field emission display (FED) devices with SiC-nanowire-based cathodes. The SiC-nanowire FEDs (flat vacuum lamps) were characterized by low emission threshold fields (∼2 V µm(-1)), high current density and stable long-term performance. The analysis of field emission data evidenced that the Schottky effect would have a considerable influence on the field emission from nanowire-based samples, leading to the true values of the field enhancement factor being significantly lower than those derived from Fowler-Nordheim plots.

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The goal of the work is to make a comparative analysis of the luminance, efficiency, and lifetime of some green and blue phosphors based on (Zn,Mg)O, ZnOLi20-Ba203, ZnGa204, ZnS etc.The optimal synthesis conditions for the ZnGa204:Mn phosphor have been designed. The CL efficiency of this phosphor has been found to reach 0.8 lm/W in the range 100-1000 eV. When excitation density is below 1 WIcm2, the luminance decrease does not exceed 10% per 2000 hours in the stationary mode as well as in the pulse one. Addition of some aluminum and ammonium halogenides at manganese activation raises efficiency up to 1 1".It should be noted that the efficiency drop of the green ZnS:Cu,Al phosphor is above 45-50% with other conditions being equal.A blue Z~G~~O~+ ( L~O . S G~O . S )~. Z~O . S G~~O~ phosphor was synthesized. Replacement of half zinc atoms by lithium and gallium atoms leads to an increase in CL efficiency up to 0.2 lm/W, doping with titanium improves the purity of colour. The blue ZnS:Ag,Cl phosphor at the mentioned excitation conditions looses up to 70% of its luminance during 2,000 hours (the stationary mode) while the oxide phosphor remains resistant to electron bombardment.A comparative study was made of the volt-ampere and volt-luminance curves of the green and blue phosphors based on oxide and sulphide matrices in pilot VFDs. The effect of saturation is shown to be mainly peculiar to the sulphide phosphors and to be dependent on the activator concentration and the content of the conductive additive In203 in CL screens in VFDs.

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