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Photoluminescence Characteristics of the Caal2o4: Eu2+ Co-Doped With Ion Dy3+ Synthesized by Combustion Method

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  • Nguyen Ngoc Trac
  • Nguyen Manh Son
  • Phan Tien Dung

Abstract

The phosphors of CaAl2O4: Eu2+, Dy3+ with varying concentrations were synthesized by combustion method. The monoclinic single phase structure of CaAl2O4 was investigated by X-ray diffraction. The emission spectra of phosphors had a broad band with maximum at 444 nm due to electron transition from the 4f65d1 to the 4f7 of Eu2+ ion and a small peak at 575 nm due to 4F9/2 6H13/2 transition of Dy3+ ions. The excitation spectra and the decay time of phosphors were investigated also. The phosphors of CaAl2O4: Eu2+, Dy3+ had long persistence luminescence. In these phosphors, Eu2+ ions play the role of activators. Whereas, Dy3+ ions generate the hole traps that lead to the long persistent phosphorescence and act as the activators in the phosphors simultaneously. The concentration of Dy3+ ion co-doped has strong influence on the luminescence of phosphor.

Suggested Citation

  • Nguyen Ngoc Trac & Nguyen Manh Son & Phan Tien Dung, 2014. "Photoluminescence Characteristics of the Caal2o4: Eu2+ Co-Doped With Ion Dy3+ Synthesized by Combustion Method," International Journal of Chemistry and Materials Research, Conscientia Beam, vol. 2(8), pages 75-80.
    • Handle: RePEc:pkp:ijocmr:v:2:y:2014:i:8:p:75-80:id:1833
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