Effect of Dopants on Long Afterglow Properties of Y2O2S:Eu Phosphor and Its Long Afterglow Mechanism

Abstract

Abstract: Y₂O₂S:Eu phosphors doped with Mg²⁺, Ca²⁺, Sr²⁺, Ba²⁺, Ti⁴⁺ were studied by PL spectra, XRD, decay curve, relative brightness and TL spectra. The results show that those dopants
do not change crystal structure of the host, but influence afterglow properties and relative brightness, and the decay curve comprised of a fast and a slow part is well exponential. Codopants of Mg and Ti
suggest the longer afterglow duration than single ion doping, being dependent on their contents. The long afterglow mechanism of Y₂O₂S:Eu host materials was discussed on the basis of experimental results.

Key words: long afterglow, yttrium oxysulfide, dopant, mechanism

CLC Number:

O482

YUAN Shuang-Long,YANG Yun-Xia,XU Zhi-Zhen,FANG Bin. Effect of Dopants on Long Afterglow Properties of Y₂O₂S:Eu Phosphor and Its Long Afterglow Mechanism[J]. Journal of Inorganic Materials.

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Effect of Dopants on Long Afterglow Properties of Y₂O₂S:Eu Phosphor and Its Long Afterglow Mechanism

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