Evaluation of YAG:Ce3+ Phosphor Properties Synthesized by Mechanical Method

In this study, the properties of Ce3+-doped Y3Al5O12 (YAG:Ce3+) phosphors for white light emitting diodes by mechanical method was evaluated. The YAG:Ce3+ phosphors were synthesized by the mechanical method using an attrition-type mill without any extra-heat assistance. BaF2, YF3 and Al(OH)3 was used as an additive for its lower temperature reaction, respectively. The synthesis of YAG:Ce3+ phosphor was favorably achieved after 10–30 min by mechanical processing with the addition of each additive. As a result, it was made clear that the quantum yield of phosphor was well related to the crystallite size of the sample regardless of the kind of additives. The absorption rate of YAG phosphors were also well related to its median diameter. Both relationships almost agreed to those obtained for the YAG:Ce3+ phosphors synthesized by solid reaction method. It was suggested that the increase of crystallite size and median size of the sample synthesized by mechanical method is key issue to achieving higher quality of YAG:Ce3+ phosphor.

[1]  T. Kozawa,et al.  Effect of BaF2 powder addition on the synthesis of YAG phosphor by mechanical method , 2017 .

[2]  T. Kozawa,et al.  Low temperature synthesis of YAG:Ce3+ phosphor by mechanical method , 2016 .

[3]  T. Kozawa,et al.  The Synthesis of YAG : Ce 3 + Phosphor by Mechanical Method , 2016 .

[4]  T. Kozawa,et al.  One-step mechanical synthesis of LiFePO4/C composite granule under ambient atmosphere , 2014 .

[5]  T. Kozawa,et al.  Rapid synthesis of LiNi0.5Mn1.5O4 by mechanical process and post-annealing , 2014 .

[6]  T. Kozawa,et al.  One-pot Mechanical Synthesis of LiCoO2 from Li2O Powder , 2014 .

[7]  S. Chu,et al.  Effects of flux additives on the characteristics of Y2.95Al5O12:0.05Ce3+ phosphor: Particle growth mechanism and luminescence , 2013 .

[8]  H. Abe,et al.  One-step mechanical synthesis of the nanocomposite granule of LiMnPO4 nanoparticles and carbon , 2013 .

[9]  P. Bodrogi,et al.  White LED Light Characteristics as a Function of Phosphor Particle Size , 2012 .

[10]  A. Meijerink,et al.  Temperature Quenching of Yellow Ce3+ Luminescence in YAG:Ce , 2009 .

[11]  Kikuo Okuyama,et al.  Formation and Luminescence Enhancement of Agglomerate-Free YAG : Ce3 + Submicrometer Particles by Flame-Assisted Spray Pyrolysis , 2007 .

[12]  M. Senna,et al.  Effects of reduced coordination number for Ca on the electron redistribution during Ca-O-Si bridge bonding from CaO or Ca(OH)2 and SiO2 , 1999 .

[13]  M. Senna,et al.  Mechanisms of incipient chemical reaction between Ca(OH)2 and SiO2 under moderate mechanical stressing II: Examination of a radical mechanism by an EPR study , 1996 .

[14]  M. Senna,et al.  Mechanisms of Incipient Chemical Reaction between Ca(OH)2and SiO2under Moderate Mechanical Stressing , 1996 .

[15]  Akio Ikesue,et al.  Fabrication and Optical Properties of High‐Performance Polycrystalline Nd:YAG Ceramics for Solid‐State Lasers , 1995 .

[16]  K. Ohno,et al.  The Synthesis and Particle Growth Mechanism of Bright Green Phosphor YAG : Tb , 1994 .

[17]  M. Kestigian,et al.  Optical Properties of Cerium-Activated Garnet Crystals* , 1969 .

[18]  G. Blasse,et al.  Investigation of Some Ce3+‐Activated Phosphors , 1967 .