Photoluminescence properties of Ca–α-SiAlON:Ce3+ phosphors as function of composition and microstructure

Fang-Fang Xu
Lin Gana,b, Zhi-YongMaob,c, Yi-FeiWangd, Fang-FangXua,n, Ying-ChunZhuc, Qing Huangd, Xue-JianLiue

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Publication date

April 2013

DOI

10.1016/j.ceramint.2013.03.102

ISSN

0272-8842

Citation count (estimate)

Abstract

Cerium-doped Ca–α-SiAlON phosphorswithCan？1.5xSi12？m？nAlm+nOnN16？n:Cex (m？2n, 0.8≤m≤2.4, and0.02≤x≤0.40) nominalcomposi- tions havebeensynthesizedbygaspressuresintering(GPS).Thephotoluminescence(PL)propertieswerestudiedinrelationtophase composition, particlemorphology,andmicrostructure.ContinuousadditionofCerare-earth(RE)couldenhancetheemissionintensityof phosphors, whichwaspartiallyattributedtotheformationofincreasedamountofplanardefectswheredensedopingofCeionsisachieved.Such enhancement couldholdupto x？0.32, abovewhichtheemissionintensityfellslightlyduetotheformationofmoresecondaryphasesanda surface glassyphaseratherthanconcentrationquenching.Finally,possiblewaystoimprovetheluminescencepropertiesofCe-doped α-SiAlON phosphors werediscussed...

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Photoluminescence properties of Ca–α-SiAlON:Ce3+ phosphors as function of composition and microstructure

Abstract

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Photoluminescence properties of Ca–α-SiAlON:Ce3+ phosphors as function of composition and microstructure

Abstract

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