Recombination luminescence of CaSO4:Tb3+ and CaSO4:Gd3+phosphors

• Authors: Irina Kudryavtseva , Aleksandr Lushchik , Aarne Maaroos , Zhannur Azmaganbetova , Turlybek Nurakhmetov , Zhussupbek Salikhoja
• Languages of publication: EN

Abstracts

EN

A comparative study of the excitation of luminescence by VUV radiation as well as of thermally and photostimulated luminescence has been carried out for CaSO4:Tb3+ and CaSO4:Gd3+ phosphors, where Na+ or F− ions are used for charge compensation. The distinction in hole processes for the phosphors with Na+ or F− compensators is determined by the differing thermal stability of the holes localized at/near Tb3+Na+ and Gd3+Na+ (up to 100–160 K) or at/near Tb3+F−
V
Ca and Gd3+F−
V
Ca centers involving also a cation vacancy (up to 400–550 K). Tunnel luminescence in the pairs of localized electrons and holes nearby Tb3+ or Gd3+ has been detected. The mechanisms of electron-hole, hole-electron and tunnel recombination luminescence as well as a subsequent released energy transfer to RE3+ ions are considered.

Keywords

EN

luminescence; trivalent rare-earth ions; anhydrite

• Publisher: De Gruyter Open
• Journal: Open Physics
• Year: 2012
• Volume: 10
• Issue: 4
• Pages: 995-1001

Dates

published

1 - 8 - 2012

online

17 - 7 - 2012

Contributors

author

Irina Kudryavtseva

• Institute of Physics, University of Tartu, Riia 142, 51014, Tartu, Estonia

author

Aleksandr Lushchik

• Institute of Physics, University of Tartu, Riia 142, 51014, Tartu, Estonia

author

Aarne Maaroos

• Institute of Physics, University of Tartu, Riia 142, 51014, Tartu, Estonia

author

Zhannur Azmaganbetova

• L.N. Gumilyov Eurasian National University, Munaitpasov 5, 0100008, Astana, Kazakhstan

author

Turlybek Nurakhmetov

• L.N. Gumilyov Eurasian National University, Munaitpasov 5, 0100008, Astana, Kazakhstan

author

Zhussupbek Salikhoja

• L.N. Gumilyov Eurasian National University, Munaitpasov 5, 0100008, Astana, Kazakhstan

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Identifiers

DOI

10.2478/s11534-011-0091-7