The behavior of thermally and optically stimulated luminescence of long persistent phosphor after blue light illumination

Thermoluminescence of SrAl2O4:Eu2+, Dy3+: Kinetic analysis of a composite-peak

“…Regarding deep electron traps, Chernov et al, (2008) suggested that these are substitutional Dy 3+ at different Sr host-sites. We speculate that other electron traps may include oxygen vacancies acting as F-centres or aggregates such as (Dy 3+ + ‡‰ .…”

“…The solid line through the data points is the best fit of Eq. (6) (Chernov et al;2008) and that its thermoluminescence fades.…”

Temperature dependence of persistent luminescence in β-irradiated SrAl2O4:Eu2+, Dy3+ phosphor

“…Experiments carried out by Kowatary et al [16] in UV-irradiated samples exhibited an increase of the PLUM emission at 150 K, reaching maximum intensity at around 270 K. Kamiyanagi et al [17] reported that the time-integrated intensity of the PLUM in SrAl 2 O 4 :Eu, Dy decreased in the range 10-90 K from its initial value, and gradually increased above 150 K, reaching a maximum at 270 K. Chernov et al [18] confirmed that the temperature dependence of the PLUM intensity is not monotonous: it decreases about 15 times from 20 to 100 K, then exponentially increases up to 250 K, reaches maximum at 320 K and starts to decrease with increase in temperature. The common observation of room temperature long-lasting luminescence in PLUM SrAl 2 O 4 :Eu, Dy phosphors [19,20] is surely related to the PLUM intensity maximum around 320 K, described in the works previously mentioned [16][17][18].…”

Red emission in B3+- and Li+-doped SrAl2O4:Eu3+ phosphor under UV excitation

“…It is well known that SrAl 2 O 4 doped with Eu 2+ and Dy 3+ ions has been found extensive applications as long afterglow material [17,18]. However, luminescence property of Eu 3+ in SrAl 2 O 4 phosphors has seldom been reported.…”