Optical properties of densified phosphor-in-glass LED encapsulants by spark plasma sintering

被引：8
作者：
Kim, Sunil [1 ]
Kim, Byungnam [2 ]
Kim, Hyungsun [1 ]
机构：
[1] Inha Univ, Dept Mat Sci & Engn, Incheon 22212, South Korea
[2] Natl Inst Mat Sci, Funct Mat Res Ctr, Tsukuba, Ibaraki 3050047, Japan
来源：
OPTICAL MATERIALS EXPRESS | 2017年 / 7卷 / 12期
关键词：
LIGHT-SCATTERING; LUMINESCENCE PROPERTIES; LINE TRANSMISSION; LUMINOUS EFFICACY; CERAMIC PHOSPHOR; COLOR CONVERTER; COMPOSITE; PORES; FABRICATION; PARTICLE;
D O I：
10.1364/OME.7.004304
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Phosphor-in-glass (PIG) has recently been receiving attention for use in light emitting diode encapsulants because of the remarkable chemical and mechanical properties of the resulting encapsulants. The PIG plate, however, contains pores that interact with the light and lead to changes in transmittance and chromaticity of the plate. In this study, therefore, PIG was sintered via spark plasma sintering (SPS) to reduce the number of pores via the densification process, and the factors for improving the luminous efficacy of PIG were confirmed by analyzing the pore size and scattering coefficient. The luminous efficacy and color rendering index were dramatically improved in all of the PIG samples subjected to SPS. The purpose of this study is to reduce the pores and improve the optical properties of PIG via the densification process. Further, it also aims to understand the effect of the pores on the increase in the efficacy of the PIGs based on the scattering events. (C) 2017 Optical Society of America
引用
收藏
页码：4304 / 4315
页数：12
相关论文
共 32 条
  • [1] [Anonymous], 1992, LIGHT COLOR OUTDOORS
  • [2] Light scattering by pores in transparent Nd:YAG ceramics for lasers: correlations between microstructure and optical properties
    Boulesteix, R.
    Maitre, A.
    Baumard, J. -F.
    Rabinovitch, Y.
    Reynaud, F.
    [J]. OPTICS EXPRESS, 2010, 18 (14): : 14992 - 15002
  • [3] LED light sources: a survey of quality-affecting factors and methods for their assessment
    Burmen, Miran
    Pernus, Franjo
    Likar, Bostjan
    [J]. MEASUREMENT SCIENCE AND TECHNOLOGY, 2008, 19 (12)
  • [4] Synthesis and luminescence properties of glass ceramics containing MSiO3:Eu2+ (M=Ca, Sr, Ba) phosphors for white LED
    Cui, Zhiguang
    Jia, Guohua
    Deng, Degang
    Hua, Youjie
    Zhao, Shilong
    Huang, Lihui
    Wang, Huanping
    Ma, Hongping
    Xu, Shiqing
    [J]. JOURNAL OF LUMINESCENCE, 2012, 132 (01) : 153 - 160
  • [5] Influence of light scattering on luminous efficacy in Ce:YAG glass-ceramic phosphor
    Fujita, Shunsuke
    Umayahara, Yoshio
    Tanabe, Setsuhisa
    [J]. JOURNAL OF THE CERAMIC SOCIETY OF JAPAN, 2010, 118 (1374) : 128 - 131
  • [6] Spark plasma sintering of hydroxyapatite powders
    Gu, YW
    Loh, NH
    Khor, KA
    Tor, SB
    Cheang, P
    [J]. BIOMATERIALS, 2002, 23 (01) : 37 - 43
  • [7] Ce3+ Doped yttrium aluminum and lutetium aluminum garnet embedded in a soda-lime silica glass by a sintering technique
    Herrmann, Andreas
    Ruessel, Christian
    Pachler, Peter
    [J]. OPTICAL MATERIALS EXPRESS, 2015, 5 (10): : 2193 - 2200
  • [8] Fabrication of transparent continuous oxynitride glass fiber-reinforced glass matrix composite
    Iba, H
    Naganuma, T
    Matsumura, K
    Kagawa, Y
    [J]. JOURNAL OF MATERIALS SCIENCE, 1999, 34 (23) : 5701 - 5705
  • [9] Effect of hydroxyapatite morphology/surface area on the rheology and processability of hydroxyapatite filled polyethylene composites
    Joseph, R
    McGregor, WJ
    Martyn, MT
    Tanner, KE
    Coates, PD
    [J]. BIOMATERIALS, 2002, 23 (21) : 4295 - 4302
  • [10] Facile one-step fabrication of 2-layered and 4-quadrant type phosphor-in-glass plates for white LEDs: an insight into angle dependent luminescence
    Kim, Eden
    Unithrattil, Sanjith
    Sohn, In Seong
    Kim, Seung Jun
    Chung, Woon Jin
    Im, Won Bin
    [J]. OPTICAL MATERIALS EXPRESS, 2016, 6 (03): : 804 - 814
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