Temperature dependence of the luminescence of powder SrAl₂O₄:(Eu²⁺, Dy³⁺) phosphor excited by cw and pulsed laser radiation

Abstract This paper presents the results of a study of the temperature dependence of the photoluminescence and phosphorescence of the mechanoluminophor powder SrAl2O4:(Eu2+), SrAl2O4:(Eu2+, Dy3+), CaAl2O4:(Eu2+, Dy3+) which are promising materials for the creation of mechano-optical converters. The photoluminescence of the phosphors’ phosphorescence was excited by a set of cw lasers with different wavelengths. The temperature dependence of the kinetics of the photoluminescence and phosphorescence afterglow was studied. It is shown that with an increase in temperature to T » 90 °C, an increase in the intensity of the afterglow (phosphorescence) is observed in the initial period of time after switching off the exciting laser radiation.