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Effect of PVA Polymerization on Synthesis of YAG:Ce3+ Phosphor Powders Prepared by a Solid-liquid Hybrid Route

PVA 중합도가 고상-액상 혼합 방식에 의한 YAG:Ce3+ 형광체 분말 합성에 미치는 영향

  • Kim, A-Reum (Department of Advanced Materials Science and Engineering, Mokpo National University) ;
  • Lee, Sang-Jin (Department of Advanced Materials Science and Engineering, Mokpo National University)
  • 김아름 (국립목포대학교 신소재공학과) ;
  • 이상진 (국립목포대학교 신소재공학과)
  • Received : 2014.08.18
  • Accepted : 2014.09.04
  • Published : 2014.09.30

Abstract

YAG:$Ce^{3+}$ phosphor powders were synthesized using $Al(OH)_3$ seeds by means of a PVA-polymer-solution route. Various types of PVA with different molecular weights (different polymerization) were used. All dried precursor gels were calcined at $500^{\circ}C$ and then heated at $1500^{\circ}C$ in a mix of nitrogen and hydrogen gases. The final powders were characterized via XRD, SEM, PSA, PL, and PKG analyses. The phosphor properties and morphologies of the synthesized powders were dependent on the PVA type. As the molecular weight of the PVA was increased, the particle size gradually decreased with agglomeration, and the luminous intensity of the phosphor increased. However, the phosphor powder prepared from the PVA exhibiting very high molecular weight, showed a 531 nm (blue) shift from the 541 nm (yellow) wavelength of the YAG:$Ce^{3+}$ phosphor. Finally, the synthesized YAG:$Ce^{3+}$ phosphor powder prepared from the PVA with 89,000 - 98,000 molecular weight showed phosphor properties similar to those of a commercial phosphor powder, but without a post-treatment process.

Acknowledgement

Supported by : 지식경제부(MKE)

References

  1. H. J. Chang, C. S. Son, and J. S. Hur, "Effect of Yellow Phosphor on Characteristics of White Light Emitting Diode," Surf. Eng., 40, 103-06 (2007). https://doi.org/10.5695/JKISE.2007.40.2.103
  2. H. W. Choi and J. H. Ko, "Analysis of Luminous Characteristics of White LEDs Depending on Yellow Phosphors," Kor. J. Optics and Photonics, 24 [2], 64-70 (2013). https://doi.org/10.3807/KJOP.2013.24.2.064
  3. H. G. Jung, G. H. Hwang, K. Y. Lim, Y. H. Lee, and S. G. Kang, "Synthesis and Phase Transformation Behavior of YAG Powders by a Mechanochemical Solid Reaction," J. Kor. Powder. Metall. Inst., 13 [4], 243-49 (2006). https://doi.org/10.4150/KPMI.2006.13.4.243
  4. X. Li, H. Liu, J. Wang, H. Cui, and F. Han, "YAG:Ce Nanosized Phosphor Particles Prepared by a Solvothermal Method," Mater. Res. Bull., 39 [12], 1923-30 (2004). https://doi.org/10.1016/j.materresbull.2004.05.013
  5. J. Zhou, F. Zhao, X. Wang, Z. Li, Y. Zhang, and I. Yang, "Template Synthesis and Luminescent Properties of Nanosized YAG:Tb Phosphors," J. Luminescence, 119-120, 237-41 (2006). https://doi.org/10.1016/j.jlumin.2005.12.036
  6. S. M. Kim, S. H. Gee, J. I. Goo, and T. O. Kim, "The Luminescence Properties of YAG:Tb$^{3+}$ Phosphor Prepared by Hydrothermal Synthesis(in Korean)," J. Kor. Ceram. Soc., 37 [8], 745-50 (2000).
  7. S. K. Lee and H. W. Choi, "Photoluminescence Characteristics of YAG:Ce Phosphor by Combustion Method," J. Kor. Inst. Electron. Mater. Eng., 20, 536-40 (2007). https://doi.org/10.4313/JKEM.2007.20.6.536
  8. T. M. Chen, S. C. Chen, and C. J. Yu, "Preparation and Characterization of Garnet Phosphor Nanoparticles Derived from Oxalate Coprecipitation," J. Solid State Chem., 144 [2], 437-41 (1999). https://doi.org/10.1006/jssc.1999.8202
  9. H. J. Lee, S. K. Hong, D. S. Jung, Y. C. Kang, and K. Y. Jung, "Fine Size YAG:Tb Phosphor Particles Prepared by Spray Pyrolysis," Kor. Chem. Eng. Res., 43 [3], 407-11 (2005).
  10. M. Suarez, A. Fernandez, J. L. Menendez, and R. Torrecillas, "Production of Dispersed Nanometer Sized YAG Powders from Alkoxide, Nitrate and Chloride Precursors and Spark Plasma Sintering to Transparency," J. Alloy. Comp., 493 [1-2], 391-95 (2010). https://doi.org/10.1016/j.jallcom.2009.12.108
  11. M. L. Saladino, G. Nasillo, D. C. Martino, and E. Caponetti, "Synthesis of Nd:YAG Nanopowder Using the Citrate Method with Microwave Irradiation," J. Alloy. Comp., 491 [1-2], 737-41 (2010). https://doi.org/10.1016/j.jallcom.2009.11.054
  12. C. H. Lu, W. T. Hsu, W. T. J. Dhanaraj, and R. Jagannathan, "Sol-gel Pyrolysis and Photoluminescent Characteristics of Europium-ion Doped Yttrium Aluminum Garnet," J. Eur. Ceram. Soc., 24 [15-16], 3723-29 (2004). https://doi.org/10.1016/j.jeurceramsoc.2003.12.009
  13. T. Ogi, A. B. D. Nandiyanto, W. N. Wang, F. Iskandar, and K. Okuyama, "Direct Synthesis of Spherical YAG:Ce Phosphor from Precursor Solution Containing Polymer and Urea," Chem. Eng. J., 210, 461-66 (2012). https://doi.org/10.1016/j.cej.2012.09.033
  14. Y. H. Kim and S. J. Lee, "Synthesis of YAG:Ce$^{3+}$ Phosphor Powders by Polymer Solution Route and Alumina Seed Application," J. Kor. Powder. Metall. Inst., 20, 37-42 (2013) https://doi.org/10.4150/KPMI.2013.20.1.037
  15. S. K. No, K. H. Choi, J. W. Kuk, and W. S. Ryu, "Preparation and Application of Poly(vinyl alcohol) Having Various Molecular Parameters," Polym. Sci. Technol., 15, 4-11 (2004).
  16. M. Harada and M. Goto, "Synthesis of Y-Al-O Compounds by a Polymer Complex Method," J. Alloy Comp., 408-412, 1193-95 (2005).