Title of article
Electron–hole and excitonic processes in CaSO4 doped with Gd3+, Tb3+ and Dy3+ luminescent ions
Author/Authors
I. Kudryavtseva، نويسنده , , P. Liblik، نويسنده , , A. Lushchik، نويسنده , , A. Maaroos، نويسنده , , E. Vasil’chenko، نويسنده , , Z. Azmaganbetova، نويسنده , , T. Nurakhmetov، نويسنده , , B. Toxanbayev، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2009
Pages
4
From page
1890
To page
1893
Abstract
The spectra of cathodoluminescence and phosphorescence (T=6 K) as well as recombination thermostimulated luminescence of rare-earth centres (T=8–400 K) have been measured for CaSO4:Gd3+,Na+; CaSO4:Tb3+,Na+; CaSO4:Dy3+,Na+ and CaSO4:Gd3+,Dy3+,Na+ phosphors synthesized in Tartu. The tunnel luminescence and photo-stimulated (by 2–3 eV photons) luminescence of Gd3+ centers have been revealed. A comparison of the excitation spectra for fast and recombination emissions allowed to separate the processes of photoionization (hν>9.5 eV) and photoexcitation (hν=8–9 eV) of SO42− molecular oxyanions. In CaSO4:Dy3+,Gd3+,Na+ polydoped phosphors, thermoluminescence at 6–750 K has been studied.
Keywords
Tunnel and thermoluminescence , Trivalent rare earth ions , CaSO4
Journal title
Journal of Luminescence
Serial Year
2009
Journal title
Journal of Luminescence
Record number
1259803
Link To Document