Luminescence properties of the x-ray storage phosphor BaBr 2

Ce3+

G. Corradi, M. Secu, S. Schweizer, J. M. Spaeth

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Photoluminescence studies on single-crystal samples of the x-ray storage phosphor orthorhombic BaBr2Ce3+ show the existence of three luminescent Ce sites with distinct emission and excitation spectra. The isolated Ce3+ emits only at low temperatures, while the two other Ce3+ sites are charge compensated and active also at room temperature. One of the charge compensators was identified as a monovalent cation impurity, which was confirmed by the investigation of BaBr 2:Ce3+ co-doped with potassium. The same charge-compensated sites serve as efficient emission sources during the read-out of stored images following x-ray exposure. Read-out is a photostimulated luminescence (PSL) process initiated by the excitation of x-ray-induced F-type trapped electron centres in the visible region. There are two different PSL processes, corresponding to the two kinds of charge-compensated Ce centre, each involving trapped electron and trapped hole centres of a slightly different kind in the vicinity of the charge-compensated Ce sites.

Original languageEnglish
Pages (from-to)1489-1500
Number of pages12
JournalJournal of Physics Condensed Matter
Volume16
Issue number8
DOIs
Publication statusPublished - Mar 3 2004

Fingerprint

Phosphors
phosphors
Luminescence
luminescence
X rays
Monovalent Cations
x rays
Electrons
compensators
excitation
Potassium
potassium
Photoluminescence
emission spectra
Positive ions
Single crystals
Impurities
photoluminescence
cations
impurities

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Luminescence properties of the x-ray storage phosphor BaBr 2 : Ce3+. / Corradi, G.; Secu, M.; Schweizer, S.; Spaeth, J. M.

In: Journal of Physics Condensed Matter, Vol. 16, No. 8, 03.03.2004, p. 1489-1500.

Research output: Contribution to journalArticle

Corradi, G. ; Secu, M. ; Schweizer, S. ; Spaeth, J. M. / Luminescence properties of the x-ray storage phosphor BaBr 2 : Ce3+. In: Journal of Physics Condensed Matter. 2004 ; Vol. 16, No. 8. pp. 1489-1500.
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