Photostimulated luminescence in Eu-doped fluorochlorozirconate glass ceramics

Schweizer, Stefan; Hobbs, Linn W.; Secu, Mihail; Spaeth, Johann-Martin; Edgar, Andrew; Williams, Grant V. M.
July 2003
Applied Physics Letters;7/21/2003, Vol. 83 Issue 3, p449
Academic Journal
We report the synthesis of Eu[SUP2+]- and chlorine-doped fluorozirconate glass-ceramics that show an intense photostimulated luminescence (PSL) after x-ray irradiation at room temperature. The PSL efficiency is up to 80% of that found in the well-known crystalline x-ray storage phosphor BaFBr:Eu[SUP2+], and it is the largest thus far reported for a glass-ceramic. We attribute the PSL to crystallites of orthorhombic BaCl[SUB2] that are formed after annealing above the glass temperature. Hexagonal BaCl[SUB2] crystallites are also observed after short annealing times, but they do not provide a measurable PSL signal. The photoluminescence peak from glass-ceramics containing orthorhombic BaCl[SUB2] crystallites occurs at 402 nm, and the stimulation band is centered at about 560 nm.


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