Characterization of Low-Voltage Phosphor Screens for Fed Applications

Abstract

A phosphor screen which operates at low excitation energy must show good emission efficiency and sustain stabilities against high vacuum and high current density operation. In this study, low voltage phosphors suitable for FED applications were experimentally addressed and screened onto ITO-glass by the electrophoretic deposition which offers several advantages, including easy control of film thickness and high packing density. Process variables such as deposition rate, salt concentration, etc., in electrophoretic deposition method were optimized to achieve high quality of the screens. Correlations of process variables with particle size, surface morphology and luminescent properties of phosphors will be presented. Particularly, much attention was put on the optimization of phosphor screens for the maximal CL intensities and adhesion of particles over substrate when excited by field emitter arrays.

Autogenic Synthesis of Green- and Red-Emitting Single-Phase Pr2O2CO3 and PrO1.833 Luminescent Nanopowders

“…There are limited reports in the literature on the synthesis of Pr 3+ ion related materials. The praseodymium ions were embedded in SiO 2 /TiO 2 glasses by the sol−gel method, and PL excitation spectra revealed the presence of energy transfer between the host matrix states and the Pr 3+ ions . The praseodymium oxide formation by thermal decomposition of a praseodymium carbonate octahydrate was demonstrated by Popa and Kakihana .…”

Electrophoretic Deposition of Phosphors for Information Displays and Solid State Lighting

“…EPD with the standard IPA bath is routinely used to deposit phosphor coatings for study of their luminescent behavior [42][43][44] …”

Optical characteristics of phosphor screen in field emission environments

“…5. Deposition rate was found to be the important process variables in obtaining the maximal packing density which might give the maximal luminance [8]. Here, another method to increase the efficiency of phosphor screens under the operation of low voltage and high current is to make a leakage path for the electrons.…”