Massive red-shifting of Ce3+ emission by Mg2+ and Si4+ doping of YAG:Ce transparent ceramic phosphors

Y3MgxAl5−2xSixO12:Ce (YAMSG:Ce) transparent ceramics were successfully prepared for the first time by a vacuum sintering technique. Regulation of a wide range of spectra from 533 nm to 598 nm was accomplished in YAMSG:Ce transparent ceramics. The transmittance of the as-prepared YAMSG:Ce transparent ceramics can reach 78%. Moreover, the internal quantum efficiencies of Y2.985Mg0.5Al4Si0.5O12:Ce can reach 75%. Both a high luminous efficiency of up to 95 lm W−1 and a low correlated color temperature of 3762 K can be achieved in a Y2.985Mg0.5Al4Si0.5O12:Ce transparent ceramic as the ceramic was coupled with a commercial blue LED chip. The broad color area from yellow-green to orange-red region in the color coordinates diagram was recorded. YAMSG:Ce transparent ceramics prepared in the present work can offer scientists a new matrix to explore their applications in areas such as luminescent materials, scintillators, solid-state lasers and armor.

[1]  F. Selim,et al.  MgO assisted densification of highly transparent YAG ceramics and their microstructural evolution , 2018 .

[2]  Jun Jiang,et al.  Spectrum regulation of YAG:Ce transparent ceramics with Pr, Cr doping for white light emitting diodes application , 2017 .

[3]  Z. Xia,et al.  Ce3+-Doped garnet phosphors: composition modification, luminescence properties and applications. , 2017, Chemical Society reviews.

[4]  Yung-Tang Nien,et al.  Improved thermal quenching of Y3Al5O12:Ce phosphor ceramics with silica addition , 2016 .

[5]  Song Hu,et al.  Transparent YAG:Ce ceramics for WLEDs with high CRI: Ce3+ concentration and sample thickness effects , 2016 .

[6]  Zhaohui Huang,et al.  New garnet structure phosphors, Lu3−xYxMgAl3SiO12:Ce3+ (x = 0–3), developed by solid solution design , 2016 .

[7]  Yifan Zheng,et al.  Structure and redshift of Ce3+ emission in anisotropically expanded garnet phosphor MgY2Al4SiO12:Ce3+ , 2016 .

[8]  M. Lee,et al.  Warm-white light-emitting diode with high color rendering index fabricated by combining trichromatic InGaN emitter with single red phosphor. , 2015, Optics express.

[9]  Daqin Chen,et al.  Transparent Ce3+: Y3Al5O12 glass ceramic for organic-resin-free white-light-emitting diodes , 2014 .

[10]  Yongchi Tian.  Development of phosphors with high thermal stability and efficiency for phosphor-converted LEDs , 2014 .

[11]  Shengming Zhou,et al.  Fabrication of Ce:YAG, Ce,Cr:YAG and Ce:YAG/Ce,Cr:YAG dual-layered composite phosphor ceramics for the application of white LEDs , 2014 .

[12]  S. Denbaars,et al.  Consequences of Optimal Bond Valence on Structural Rigidity and Improved Luminescence Properties in SrxBa2–xSiO4:Eu2+ Orthosilicate Phosphors , 2014 .

[13]  S. Denbaars,et al.  An efficient, thermally stable cerium-based silicate phosphor for solid state white lighting. , 2013, Inorganic chemistry.

[14]  Y. Fujimoto,et al.  Properties of transparent Ce:YAG ceramic phosphors for white LED , 2011 .

[15]  S. Jeong,et al.  Luminescence Characteristics of Y3Al5 − 2y ( Mg , Si ) y O12 : Ce Phosphor Prepared by Spray Pyrolysis , 2010 .

[16]  A. Zukauskas,et al.  Y3−xMg2AlSi2O12:Cex3+ phosphors – prospective for warm-white light emitting diodes , 2010 .

[17]  Q. Zhang,et al.  Warm white light from Y4MgSi3O13:Bi3+, Eu3+ nanophosphor for white light-emitting diodes. , 2009, Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy.

[18]  D. Jeon,et al.  Improvement of electroluminescent property of blue LED coated with highly luminescent yellow-emitting phosphors , 2009 .

[19]  James S. Speck,et al.  Prospects for LED lighting , 2009 .

[20]  C. Humphreys.  Solid-State Lighting , 2008 .

[21]  Jong Kyu Kim,et al.  Solid-State Light Sources Getting Smart , 2005, Science.

[22]  W. H. Baur.  The geometry of polyhedral distortions. Predictive relationships for the phosphate group , 1974 .

[23]  Yingliang Liu,et al.  Eu3+‐Doped Phosphor‐in‐Glass: A Route toward Tunable Multicolor Materials for Near‐UV High‐Power Warm‐White LEDs , 2017 .