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

Authors

  • Nguyen Ngoc Trac College of Sciences, Hue University, Hue City, Vietnam and Hue Industrial College, Hue City, Vietnam
  • Nguyen Manh Son College of Sciences, Hue University, Hue City, Vietnam
  • Phan Tien Dung Vietnam Academy of Science and Technology, Hanoi, Vietnam

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.

Keywords:

Alkaline earth, Photoluminescence, Persistence, Phosphorescence, Combustion method, Calcium aluminate

Published

2014-08-15

How to Cite

Trac, N. N. ., Son, N. M. ., & Dung, P. T. . (2014). Photoluminescence Characteristics of the Caal2o4: Eu2+ Co-Doped With Ion Dy3+ Synthesized by Combustion Method. International Journal of Chemistry and Materials Research, 2(8), 75–80. Retrieved from https://archive.conscientiabeam.com/index.php/64/article/view/1833

Issue

Vol. 2 No. 8 (2014)

Section

Articles