Optimization of Yttrium Aluminum Garnet:Ce3+ Phosphors for White Light-Emitting Diodes by Combinatorial Chemistry Method
Open Access
- 1 January 2002
- journal article
- Published by The Electrochemical Society in Journal of the Electrochemical Society
- Vol. 149 (11), J85-J88
- https://doi.org/10.1149/1.1511755
Abstract
Filament light bulbs and halogen lamps are widely used to light houses and offices but are energy inefficient. We synthesized optimal phosphors for 460 nm blue light-emitting diodes (LEDs) and fabricated white LEDs to develop energy-efficient, reliable, and long-lived solid-state lighting LED devices. GaN-based blue LEDs are the excitation source for yttrium aluminum garnet: Ce3+Ce3+ (YAG:Ce3+)(YAG:Ce3+) phosphors, and the YAG:Ce3+YAG:Ce3+ phosphors convert the blue light into red and green lights. We take combinatorial chemistry method as a tool to rapidly synthesize and screen potential garnet phosphors for use as blue to yellow down-conversion phosphors in white LEDs. Using combinatorial chemistry, we find the optimal YAG:Ce3+YAG:Ce3+ phosphors, (Y0.95(Y0.95 Ce0.05)3Al5O12Ce0.05)3Al5O12 for white LEDs. We also fabricate highly energy-efficient white light emitting diodes by combining (YAG): Ce3+Ce3+ phosphors and blue LEDs. © 2002 The Electrochemical Society. All rights reserved.Keywords
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