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Chinese Physics, 2000, Vol. 9(1): 69-72    DOI: 10.1088/1009-1963/9/1/014
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev  

PHASE DEPENDENCE OF LUMINESCENT EMISSION OF Eu2+ DOPED SrAl2O4

Jia Dong-dong (贾冬冬)a, Wu Bo-qun (吴伯群)a, Zhu Jing (朱静)b
a Central Iron and Steel Institute, Beijing 100081, China; b School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
Abstract  In this work, we made five samples of SrAl2O4: Eu2+, Dy3+, the $\alpha$ phase and $\beta$ phase SrAl2O4:Eu2+,Dy3+ powder and pellet samples, and $\alpha$ phase single crystal. We have measured the emission spectra of all the samples. All the emission peaks are around 520 nm, which correspond to the transition from 4f65d1(2Eg) to 4f7(8S7/2) of Eu2+ in SrAl2O4 host. The intensity of emission of the $\beta$ phase is stronger than that of the $\alpha$ phase. We believe that it is because the Eu2+ ions have occupied the two types of sites in the $\alpha$  phase SrAl2O4 host and the lifetime of the transition of Eu2+ in the A site is longer than that in the B site. This result also proves that the $\beta$ phase of the material is brighter than the $\alpha$  phase. In addition, the $\beta$ phase can be achieved by quenching technique.
Received:  15 July 1999      Accepted manuscript online: 
PACS:  71.70.Ch (Crystal and ligand fields)  
  78.55.Hx (Other solid inorganic materials)  
  81.40.Gh (Other heat and thermomechanical treatments)  

Cite this article: 

Jia Dong-dong (贾冬冬), Wu Bo-qun (吴伯群), Zhu Jing (朱静) PHASE DEPENDENCE OF LUMINESCENT EMISSION OF Eu2+ DOPED SrAl2O4 2000 Chinese Physics 9 69

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