Persistent luminescence and thermoluminescence of UV/VIS -irradiated SrAl2O4: Eu2+, Dy3+ phosphor

The persistent luminescence and thermoluminescence properties of SrAl2O4: Eu2+, Dy3+ phosphors excited with UV–VIS light in the 200–500 nm region were investigated. The thermoluminescence glow curve was found to be composed of peaks around 70, 125 and 245 °C. The persistent luminescence and thermoluminescence excitation spectra exhibited a broad band around 300–500 nm centered at 400 and 420 nm respectively. A linear behavior of the integrated thermoluminescence intensity and persistent luminescence versus irradiation time was found for the first 60 s. The charge detrapping from the 70 °C trapping levels was the major contributor to the observed persistent luminescence at room temperature. The SrAl2O4: Eu2+, Dy3+ phosphors have suitable properties to be applied as storage and persistent luminescence UV–VIS irradiation dose phosphor.

► SrAl2O4:Eu2+, Dy3+ persistent luminescence and thermoluminescence was measured.
► The phosphor was irradiated with UV–VIS photons in the 200–500 nm wavelength range.
► SrAl2O4:Eu2+, Dy3+ behaves adequately as persistent and storage UV–VIS dosimeter.
► The persistent luminescence dosimetry does not require heat or light stimulation.