Adhesion Improvement of Phosphor Layer by Combining Electrophoretic Deposition and UV Curing

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Abstract
Electrophoretic deposition of a phosphor layer was examined in order to improve the adhesion strength of phosphor particles using (Y0.964Eu0.036)2O3.(Y0.964Eu0.036)2O3. A considerable level of improvement in adhesion strength between phosphor particles (and substrate) was obtained when an ultraviolet (UV) curing process was used instead of water inclusion and/or postannealing. An aqueous solution of polyvinyl alcohol and ammonium dichromate was coated by spraying onto the electrophoretically deposited phosphor layer followed by curing under UV light for cross-linking. Based upon photoluminescence and scanning electron microscope studies, little optical and structural changes in the phosphor layer were found as a result of optimized amount of the curing agents and UV exposure. © 2003 The Electrochemical Society. All rights reserved.