Abstract
Electrophoretic deposition (EPD ) has been used as a phosphor screening procedure for a variety of information displays and more recently, solid state lighting. EPD is well suited to deposit the fine (nanometer to micrometer diameter) phosphor particles needed for high resolution displays. The fundamentals of the EPD process in a standard isopropanol bath are characterized by the dissociation behavior of nitrate salts in isopropanol, measurement of the effects of pH and nitrate salt concentration on the zeta potential of the particles, and process conditions with modeling of the deposition rates. The electrochemical precipitation reactions that form the adhesive agents and techniques to enhance the adhesion strength to meet the requirements of these new applications are discussed. Methods to fabricate full-color and the optical performance of the phosphor film are reviewed.
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