Title of Paper:Exploring a particle-size-reduction strategy of YAG:Ce phosphor via a chemical breakdown method

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Affiliation of Author(s):[1]School of Materials and Energy,University of Electronic Science and Technology of China,Chengdu 611731,China;[2]College of Materials and Chemistry&Chemical Engineering,Chengdu University of Technology,Chengdu 610059,China;[3]Department of Materials Science and Engineering,University of Central Florida,Orlando 32816,USA;[4]National Engineering Research Center of Electromagnetic Radiation Control Materials,University of Electronic Science and Technology of China,Chengdu 6U731,China;[5]Laboratory of Materials for Energy Conversion,Department of Materials Science and Engineering,University of Science and Technology of China,Hefei 230026,China;[6]CNBM(Hefei)Powder Technology Equipment CO.,Ltd.,Hefei Cement Research&Design Institute,Hefei 230026,China

Journal:稀土学报（英文版）

Key Words:Y_(3)Al_(5)O_(12):Ce phosphor;Particle size reduction;Carbon coating;Rare earths

Abstract:Particle size reduction of Y_(3)Al_(5)O_(12):Ce(YAG:Ce) phosphor is highly needed for micro-LED display applications.In this work,size control of YAG:Ce phosphor particles is achieved via carbon coating and further heat treatment.A thin layer of carbon is deposited on the surface of YAG:Ce by chemical vapor deposition.During the heat treatment,carbon reacts with oxygen element in the phosphor and escapes from phosphor particles.The reaction results in the phosphor breaking into smaller particles.The phosphors were characterized by laser light scattering for particle size distribution,scanning electron microscopy(SEM),transmission electron microscopy for morphologies,X-ray diffraction refinements for crystal structure and electron energy-loss spectroscopy for elemental analysis.It is demonstrated that the median diameter(D_(50)) of the phosphor particle size is significantly reduced from 19.1 to 0.96 μm yet the photoluminescent properties have little changes.The carbon coating and further heat treatment method show potential application in size control of phosphors.

Volume:39

Issue:8

Page Number:938-945

ISSN No.:1002-0721

Translation or Not:no

CN No.:11-2788/TF