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Morphology and Cathodoluminescence of Li-Doped SrTiO3:Pr3+,Ga3+, A Red Phosphor Operating at Low Voltages

Published online by Cambridge University Press:  21 March 2011

Jin Young Kim ,
Duk Young Jeon ,
Seong-Gu Kang ,
Seung-Youl Kang  and
Kyung-Soo Suh
Jin Young Kim
Affiliation:
Dept. of Materials Sci. and Eng., Korea Advanced Institute of Sci. & Tech., 373-1, Kusong-dong, Yusung-gu, Taejon, 305-701, Korea
Duk Young Jeon
Affiliation:
Dept. of Materials Sci. and Eng., Korea Advanced Institute of Sci. & Tech., 373-1, Kusong-dong, Yusung-gu, Taejon, 305-701, Korea
Seong-Gu Kang
Affiliation:
Dept. of Chemical Eng., Hoseo Univ., Korea
Seung-Youl Kang
Affiliation:
Electronics and Telecommunications Research Institute, Korea
Kyung-Soo Suh
Affiliation:
Electronics and Telecommunications Research Institute, Korea
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Abstract

SrTiO3:Pr,Ga phosphor using Li2CO3 as a flux has been investigated as a red phosphor for the application to fluorescent displays operated at low voltage. In SrTiO3:Pr,Ga system, Pr3+can substitute for Sr2+ because the ionic radius of Pr3+almost coincides with that of Sr2+. Previous work, it was found by XRF analysis of SrTiO3:Pr,Ga single crystal that only a small fraction of Pr ions are incorporated in the SrTiO3 lattice. In the present study, the effect of Li addition into SrTiO3:Pr,Ga on the cathodoluminescence (CL) properties was examined at low acceleration voltage. Especially, thanks to the liquid phase of Li2CO3 during the sintering process, doped Li ions act as a lubricant for the efficient incorporation of Pr ions into SrTiO3:Pr,Ga lattice. Furthermore, it is found that the Li addition could enhance the generation of the characteristic emission of Pr-activated SrTiO3phosphors.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 667: Symposium G – Luminescence and Luminescent Materials , 2001 , G3.7
Copyright
Copyright © Materials Research Society 2001

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References

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