Browse > Article
http://dx.doi.org/10.3740/MRSK.2008.18.1.001

Phase Transformation and Luminescent Properties of Ca1-xSrxAl2O4:Eu2+ Phosphors  

Park, Yun-Jin (Dept. of Materials Science and Engineering, Kyonggi University)
Song, Hyun-Don (EPIPLUS Inc)
Jung, Sang-Hyun (DAEJOO ELECTRONIC MATERIALS Co.)
Lee, Jee-Hee (Dept. of Materials Science and Engineering, Kyonggi University)
Hwang, Min-Ha (Dept. of Materials Science and Engineering, Kyonggi University)
Kim, Young-Jin (Dept. of Materials Science and Engineering, Kyonggi University)
Publication Information
Korean Journal of Materials Research / v.18, no.1, 2008 , pp. 1-4 More about this Journal
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.
Keywords
strontium-aluminates; calcium-aluminates; luminescence; europium; phase transformation;
Citations & Related Records

Times Cited By SCOPUS : 0
연도 인용수 순위
  • Reference
1 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)   DOI   ScienceOn
2 T. -P. Tang, C. -M. Lee and F. -C. Yen, Ceram. Int., 32, 665 (2006)   DOI   ScienceOn
3 C. Chang, D. Mao, J. Shen and C. Feng, J. Alloys Compd., 348, 224 (2003)   DOI   ScienceOn
4 A.K. Prodjosantoso and B.J. Kennedy, Mater. Res. Bull., 38, 79 (2003)   DOI   ScienceOn
5 T. Aitasalo, J. Hilsa, H. Jungner, M. Lastusaari and J. Niittykoski, J. Lumin., 94, 59 (2001)   DOI   ScienceOn
6 D. Ravichandran, S. T. Johnson, S. Erdei, R. Roy and W.B. White, Display, 19, 197 (1999)   DOI   ScienceOn
7 J. Hilsa, H. Jungner, M. Lastusaari and J. Niittykoski, J. Alloys Comp., 323, 326 (2001)   DOI   ScienceOn
8 Y. Lin, Z. Zhang, Z. Tang, J. Zhang, Z. Zheng and X. Lu, Mater. Chem. Phys., 70, 156 (2001)   DOI   ScienceOn
9 W. S. Shi, H. Yamada, K. Nishikubo, H. Kusaba and C. N. Xu, J. Electrochem. Soc., 151, H97 (2004)   DOI   ScienceOn
10 L. T. Chen, C. S. Hwang, I. G. Chen and S. J. Chang, J.Alloys Comp., 426, 395 (2006)   DOI   ScienceOn
11 C. Zhu, Y. Yang, G. Chen, S. Baccaro, A. Cecilia and M. Falconieri, J. Phys. Chem. Solids, 68, 1721 (2007)   DOI   ScienceOn
12 T. Aitasalo, J. Hilsa, H. Jungner, M. Lastusaari and J. Niittykoski, J. Alloys Comp., 341, 76 (2002)   DOI   ScienceOn
13 S. Ito, S. Banno, K. Suzuki and M. Inagaki, Z. Phys. Chem., Neuw Folge, 105, 173 (1977)   DOI
14 D. D. Jia, B. Q. Wu and J. Zhu, Chin. Phys., 9, 69 (2002)   DOI   ScienceOn
15 L. T. Chen, C. S. Hwang, I. L. Sun and I. G. Chen, J.Lumin., 118, 12 (2006)   DOI   ScienceOn
16 T. Aitasalo, J. Hilsa, H. Jungner, M. Lastusaari, J.Niittykoski, M. Paekkinen and R. Valtonen, Opt. Mater.,26, 113 (2004)   DOI   ScienceOn
17 Z. Fu, S. Zhou, Y. Yu and S. Zang, Chem. Phys. Lett.,395, 285 (2004)   DOI   ScienceOn