본문 바로가기
KCI 등재

Homogeneous precipitation synthesis and photolumi-nescence properties of La2O2 SO4 : Eu3+ quasi-spherical phosphors

Journal of Ceramic Processing Research
약어 : J. Ceram. Process. Res.
2014 vol.15, no.6, pp.382 - 388
DOI : 10.36410/jcpr.2014.15.6.382
발행기관 : 한양대학교 청정에너지연구소
연구분야 : 재료공학
Copyright © 한양대학교 청정에너지연구소
Jingbao Lian 1

1Liaoning Shihua University

12 회 열람

Synthesis and photoluminescence properties of La2O2SO4 : Eu3+ quasi-spherical phosphors were investigated by homogeneous precipitation from La(NO3)3,Eu(NO3)3, (NH4)2SO4 and urea ((CO(NH2)2) as the starting materials. It was found that the yield of the precursor is strongly dependent on m value, namely, the molar ratio of urea to La(NO3)3, and the optimal m value is 10. Thermal analysis, FT-IR and XRD show the optimal precursor is composed of La2(OH)2CO3SO4 • 2H2O and can be converted into pure La2O2SO4 phase at a temperature higher than 600 o C for 1 h in air. SEM observation shows that the obtained La2O2SO4 phosphor particles are quasi-spherical in shape and narrow distribution with a mean particle size of about 2 μm. Photoluminescence spectra reveal that the emission intensities of the La2O2SO4 : Eu3+ phosphors depend on the calcination temperature and the strongest emission peak is located at 620 nm under 280 nm UV light excitation for the La2O2SO4 : Eu3+ phosphors calcined at 1000 o C, which corresponds to the 5 D0 → 7 F2 transition of Eu3+ ions. The quenching concentration of Eu3+ ions is 5 mol% and the concentration quenching mechanism is the electric dipole-quadrupole interaction for the 5 D0 → 7 F2 transition of Eu3+ ions.

Luminescent materials, Rare earth oxysulfate, Homogeneous precipitation synthesis, Photoluminescence

  • 1. [학술지] W. Paul / 1990 / / J. Magn. Magn. Mater / 87 : 23 ~
  • 2. [학술지] W. Kratz / 1996 / / J. Magn. Magn. Mater / 161 : 249 ~
  • 3. [학술지] M. Shoji / 2006 / / J. Alloy. Comp / 426 : 244 ~
  • 4. [학술지] A. M. Srivastava / 2008 / / Optical Materials / 30 : 1499 ~
  • 5. [학술지] T. Kijima / 2008 / / J. Lumin / 128 : 311 ~
  • 6. [학술지] T. Kijima / 2009 / / J. Alloy. Comp / 485 : 730 ~
  • 7. [학술지] P. Porcher / 1983 / / J. Solid State Chem / 46 : 101 ~
  • 8. [학술지] J. B. Lian / 2009 / / Mater. Res. Bull / 44 : 1822 ~
  • 9. [학술지] J. B. Lian / 2011 / / Mater. Chem. and Phys / 125 : 479 ~
  • 10. [학술지] X. H. Liu / 2012 / / RSC Advances / 2 : 9362 ~
  • 11. [학술지] D. Zhang / 2008 / / Chem. Mater / 20 : 6697 ~
  • 12. [학술지] M. Machida / 2005 / / Chem. Mater / 17 : 1487 ~
  • 13. [학술지] M. Machida / 2004 / / Chem. Commun / 6 : 662 ~
  • 14. [학술지] M. Machida / 2007 / / Chem. Mater / 19 : 954 ~
  • 15. [학술지] K. Ikeue / 2008 / / J. Alloy. Comp / 451 : 338 ~
  • 16. [학술지] S. Yamamoto / 2006 / / J. Alloy. Comp / 418 : 226 ~
  • 17. [학술지] S. Zhukov / 1997 / / Mater. Res. Bull / 32 : 43 ~
  • 18. [학술지] L. C. Machado / 2012 / / J Therm Anal Calorim / 107 : 305 ~
  • 19. [학술지] E. I. Sal’nikova / 2011 / / Russian J. Phys. Chem. A / 85 : 2121 ~
  • 20. [학술지] L. H. Lee / 1990 / / Progr Colloid Polym Sci / 82 : 337 ~
  • 21. [학술지] D. Y. Liu / 2009 / / J Mater Sci / 44 : 108 ~
  • 22. [학술지] G. X. Liu / 2007 / / J. Alloy. Comp / 432 : 200 ~
  • 23. [학술지] Q. L. Dai / 2008 / / J. Phys. Chem. C / 112 : 19399 ~