168. PHOSPHORS FOR NEAR UV-EMITTING LEDS FOR EFFICACIOUS GENERATION OF WHITE LIGHT

Department: Mechanical & Aerospace Engineering
Faculty Advisor(s): Joanna Mckittrick

Primary Student
Name: Jinkyu Han
Email: jih006@ucsd.edu
Phone: 858-334-8454
Grad Year: 2013

Abstract
An overview of the designs and materials used in white-light sources based on light diodes (LEDs) is discussed, focusing on a novel concept that has been developed by our group. This employs a near-UV LED instead of the blue-emitting LED. This design is described and contrasted and advantages and obstacles are outlined. Phosphors development and deposition are discussed for the near-UV LED design. Visible light-emitting materials (phosphors) have broad use in a variety of applications, from fluorescent and LED lighting, displays, and scintillators. Powder synthesis and post-processing methods significantly affect the luminescence properties. Several methods are outlined and compared. The luminescence properties can be used to evaluate the quality of powders ? the chemical composition and crystallite size.

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