Photostimulated luminescence in Eu-doped fluorochlorozirconate glass ceramics

Abstract

We report the synthesis of Eu2+- 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:Eu2+, and it is the largest thus far reported for a glass-ceramic. We attribute the PSL to crystallites of orthorhombic BaCl2 that are formed after annealing above the glass temperature. Hexagonal BaCl2 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 BaCl2 crystallites occurs at 402 nm, and the stimulation band is centered at about 560 nm.

Optical absorption and photoluminescence in Sm3+- and Eu3+-doped rare-earth borate glasses

“…Trivalent rareearth ions Er 3+ -and Tm 3+ -doped phosphate, silicate, germanate and tellurite glasses have been developed for infrared active optical devices [5][6][7][8][9]. Recently, research focus on rare-earth doped glasses is not limited to infrared optical devices, and there is a growing interest in visible optical devices [10][11][12][13][14]. rare-earth ions, such as Sm 3+ and Eu 3+ ions, are becoming more significant [15][16][17][18][19][20].…”

Intense visible fluorescence and energy transfer in Dy3+, Tb3+, Sm3+ and Eu3+ doped rare-earth borate glasses

“…Trivalent rare-earth ions Er and Tm doped phosphate, silicate, gemanite and tellurite glasses have been developed for infrared active optical devices [4][5][6][7][8]. Recently, research focus on rare-earth doped glasses is not limited to infrared optical devices, and there is a growing interest in visible optical devices [9][10]. With the increasing demand of various visible lasers and light sources, further investigations in other rare-earth ions, such as Dy, Tb, Sm and Eu ions, are becoming more important [11][12][13][14][15][16][17].…”

Radiation defects in Ce‐doped BaCl 2 and fluorochlorozirconate glass‐ceramic X‐ray storage phosphors

“…Eu-activated BaCl 2 and fluorochlorozirconate glass-ceramics with photostimulated luminescence (PSL)-active BaCl 2 nano-particles are very efficient X-ray storage phosphors [1,2]. The nano-crystallites are formed after heating the quenched glass above the glass temperature T g .…”