Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Phase Transformation and Luminescent Properties of Ca1-xSrxAl2O4:Eu2+ Phosphors

[Ca1-xSrxAl2O4:Eu2+] 형광체의 상전이 및 발광특성에 관한 연구

  • Published : 2008.01.31
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Abstract

The phase transformations and luminescent properties of Eu-doped $Ca_{1-x}Sr_xAl_2O_4$ phosphors were investigated. $Ca_{1-x}Sr_xAl_2O_4:Eu^{2+}$ phosphors were synthesized by a solid-state reaction with a flux, $H_3BO_3$. A phase transformation from monoclinic $CaAl_2O_4$ to monoclinic $SrAl_2O_4$ was observed as the x values increased. A high-temperature hexagonal phase of $SrAl_2O_4$ was formed during this transformation as an intermediate phase under an $H_2$ atmosphere due to oxygen vacancies; this did not occur in an air atmosphere. Accordingly, the emission spectra shifted from a blue region to a green region as x increased.

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References

  1. L. T. Chen, C. S. Hwang, I. L. Sun and I. G. Chen, J.Lumin., 118, 12 (2006) https://doi.org/10.1016/j.jlumin.2005.06.003
  2. T. Aitasalo, J. Hilsa, H. Jungner, M. Lastusaari, J.Niittykoski, M. Paekkinen and R. Valtonen, Opt. Mater.,26, 113 (2004) https://doi.org/10.1016/j.optmat.2003.11.007
  3. Z. Fu, S. Zhou, Y. Yu and S. Zang, Chem. Phys. Lett.,395, 285 (2004) https://doi.org/10.1016/j.cplett.2004.07.114
  4. T. Aitasalo, J. Hilsa, H. Jungner, M. Lastusaari and J. Niittykoski, J. Alloys Comp., 341, 76 (2002) https://doi.org/10.1016/S0925-8388(02)00068-3
  5. T. Aitasalo, J. Hilsa, H. Jungner, M. Lastusaari and J. Niittykoski, J. Lumin., 94, 59 (2001) https://doi.org/10.1016/S0022-2313(01)00279-4
  6. J. Hilsa, H. Jungner, M. Lastusaari and J. Niittykoski, J. Alloys Comp., 323, 326 (2001) https://doi.org/10.1016/S0925-8388(01)01084-2
  7. Y. Lin, Z. Zhang, Z. Tang, J. Zhang, Z. Zheng and X. Lu, Mater. Chem. Phys., 70, 156 (2001) https://doi.org/10.1016/S0254-0584(00)00500-9
  8. W. S. Shi, H. Yamada, K. Nishikubo, H. Kusaba and C. N. Xu, J. Electrochem. Soc., 151, H97 (2004) https://doi.org/10.1149/1.1677038
  9. D. Ravichandran, S. T. Johnson, S. Erdei, R. Roy and W.B. White, Display, 19, 197 (1999) https://doi.org/10.1016/S0141-9382(98)00050-X
  10. L. T. Chen, C. S. Hwang, I. G. Chen and S. J. Chang, J.Alloys Comp., 426, 395 (2006) https://doi.org/10.1016/j.jallcom.2006.02.033
  11. S. H. Ju, S. G. Kim, J. C. Choi, H. L. Park, S.-I. Mho and T. W. Kim, Mater. Res. Bull., 34, 1905 (1999) https://doi.org/10.1016/S0025-5408(99)00201-9
  12. T. -P. Tang, C. -M. Lee and F. -C. Yen, Ceram. Int., 32, 665 (2006) https://doi.org/10.1016/j.ceramint.2005.03.034
  13. C. Chang, D. Mao, J. Shen and C. Feng, J. Alloys Compd., 348, 224 (2003) https://doi.org/10.1016/S0925-8388(02)00836-8
  14. A.K. Prodjosantoso and B.J. Kennedy, Mater. Res. Bull., 38, 79 (2003) https://doi.org/10.1016/S0025-5408(02)01009-7
  15. C. Zhu, Y. Yang, G. Chen, S. Baccaro, A. Cecilia and M. Falconieri, J. Phys. Chem. Solids, 68, 1721 (2007) https://doi.org/10.1016/j.jpcs.2007.04.016
  16. S. Ito, S. Banno, K. Suzuki and M. Inagaki, Z. Phys. Chem., Neuw Folge, 105, 173 (1977) https://doi.org/10.1524/zpch.1977.105.3_4.173
  17. D. D. Jia, B. Q. Wu and J. Zhu, Chin. Phys., 9, 69 (2002) https://doi.org/10.1088/1009-1963/9/1/014