165. ELECTROPHORETIC DEPOSITION OF PHOSPHORS FOR WHITE LIGHT EMITTING DIODES (LEDS)

Department: Mechanical & Aerospace Engineering
Research Institute Affiliation: Graduate Program in Materials Science and Engineering
Faculty Advisor(s): Joanna Mckittrick | Jan Talbot

Primary Student
Name: Jae Ik Choi
Email: jic053@ucsd.edu
Phone: 404-386-5155
Grad Year: 2014

Abstract
Electrophoretic deposition (EPD) is widely used in the processing of materials and coatings and is popular because of its versatility and cost-effectiveness as a coating technique. This technique is suitable for depositing charged particles dispersed in a liquid on a substrate under the force of an applied electric field. There are many factors related to the suspension and the process that affect EPD. We have investigated in the past various aspects of EPD of phosphor particles, such as the dissociation of nitrate salts in IPA, the zeta potential of charged particles, the formation of the adhesive agents, and the factors which affect the adhesion strength of the deposited particles. Our objective is to deposit phosphors for "remote phosphor" application in a LED-based light source for better light extraction. White-emitting LED screens can be formulated by blending efficient red, green, blue, yellow and orange phosphors.

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