Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
권호 표지
DOI QR코드

DOI QR Code

Preparation of Ba2Mg(PO4)2:Eu Phosphors and Their Photoluminescence Properties Under UV Excitation

Ba2Mg(PO4)2:Eu 형광체의 합성과 자외선 여기하의 발광특성

  • Tae, Se-Won (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Jung, Ha-Kyun (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Choi, Sung-Ho (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Hur, Nam-Hwi (Dept. of Chemistry, Sogang University)
  • 태세원 (한국화학연구원 화학소재연구단) ;
  • 정하균 (한국화학연구원 화학소재연구단) ;
  • 최성호 (한국화학연구원 화학소재연구단) ;
  • 허남회 (서강대학교, 화학과)
  • Published : 2008.11.30
Download PDF
⟨ Previous Next ⟩

Abstract

For possible applications as luminescent materials for white-light emission using UV-LEDs, $Ba_2Mg(PO_4)_2:Eu^{2+}$ phosphors were prepared by a solid state reaction. The photoluminescence properties of the phosphor were investigated under ultraviolet ray (UV) excitation. The prepared phosphor powders were characterized to from a single phase of a monoclinic crystalline structure by a powder X-ray diffraction analysis. In the photoluminescence spectra, the $Ba_2Mg(PO_4)_2:Eu^{2+}$ phosphor showed an intense emission band centered at the 584 nm wavelength due to the f-d transition of the $Eu^{2+}$ activator. The optimum concentration of $Eu^{2+}$ activator in the $Ba_2Mg(PO_4)_2$ host, indicating the maximum emission intensity under the excitation of a 395 nm wavelength, was 5 at%. In addition, it was confirmed that the $Eu^{2+}$ ions are substituted at both $Ba^{2+}$ sites in the $Ba_2Mg(PO_4)_2$ crystal. On the other hand, the critical distance of energy transfer between $Eu^{2+}$ ions in the $Ba_2Mg(PO_4)_2$ host was evaluated to be approximately 19.3 A. With increasing temperature, the emission intensity of the $Ba_2Mg(PO_4)_2$:Eu phosphor was considerably decreased and the central wavelength of the emission peak was shifted toward a short wavelength.

Keywords

References

  1. S. Neeraj, N. Kijima and A.K. Cheetham, Chem. Phys. Lett., 387, 2 (2004) https://doi.org/10.1016/j.cplett.2003.12.130
  2. S. Nakamura, M. Senoh and T. Mukai, Appl. Phys. Lett., 62(19), 2390 (1993) https://doi.org/10.1063/1.109374
  3. P. Schlotter, R. Schmidt and J. Schneider, Appl. Phys., A64, 417 (1997)
  4. P. Schlotter, J. Baur, C. Hielscher, M. Kunzer, H. Obloh, R. Schmidt and J. Schneider, Mater. Sci. Eng., B59, 390 (1999) https://doi.org/10.1016/S0921-5107(98)00352-3
  5. Y. Pan, M. Wu and Q. Su, J. Phys. Chem. Solids, 65, 845 (2004) https://doi.org/10.1016/j.jpcs.2003.08.018
  6. R. M. Mach, G. Mueller, M. R. Krames, H. A. Hoppe, F. Standler, W. Schnick, T. Juestel and P. Schmidt, Phys. Stat. Sol., 202(9), 1727 (2005) https://doi.org/10.1002/pssa.200520045
  7. T. Nishida, T. Ban and N. Kobayashi, Appl. Phys. Lett., 82(22), 3817 (2003) https://doi.org/10.1063/1.1580649
  8. V. Bachmann, T. Justel, A. Meijerink, C. Ronda and P. J. Schmidt, J. Lumin., 121, 441 (2006) https://doi.org/10.1016/j.jlumin.2005.11.008
  9. M. Zhang, J. Wang, Q.Zhang, W. Ding and Q. Su, Mater. Res. Bull., 42, 33 (2007) https://doi.org/10.1016/j.materresbull.2006.05.011
  10. M. Zhang, J. Wang, W. Ding, Q Zhang and Q. Su, Appl. Phys., B86, 647(2007) https://doi.org/10.1007/s00340-006-2535-0
  11. S. Yan, J. Zhang, X.Zhang, S. Lu, X. Ren, Z. Nie and X. Wang, J. Phys. Chem., C 111, 13256 (2007) https://doi.org/10.1021/jp073991c
  12. X. Zhang, H. Zeng and Q. Su, J. Alloys & Compd., 441, 259 (2007) https://doi.org/10.1016/j.jallcom.2006.09.090
  13. H. He, R. Fu, X. Song, D. Wang and J. Chen, J. Lumin., 128, 489 (2008) https://doi.org/10.1016/j.jlumin.2007.09.023
  14. Y. Hu, W. Zhuang, H. Ye, S. Zhang, Y Fang and X. Huang, J. Lumin., 111, 139 (2005) https://doi.org/10.1016/j.jlumin.2004.07.005
  15. C. Chartier, C. Barthou, P. Benalloul and J. M. Frigerio, J. Lumin., 111, 147 (2005) https://doi.org/10.1016/j.jlumin.2004.07.006
  16. H.K. Jung, D.W. Lee, K.Y. Jung and J.H. Boo, J. Alloys & Compd., 390, 189 (2005) https://doi.org/10.1016/j.jallcom.2004.06.106
  17. F. Lucas, G. Wallez, S. Jaulmes, A. Elfakir and M. Quarton, Acta Cryst., C53, 1741 (1997) https://doi.org/10.1107/S010827019700841X
  18. Z. Wu, M. Gong, J. Shi, G. Wang and Q. Su, Chem. Lett., 36(3), 410 (2007) https://doi.org/10.1246/cl.2007.410
  19. G. Blasse, Philips Res. Rep., 24 (1969) 131