Temprature dependence of luminescence property of SrA1204:Eu2+,Dy3+ phosphors

Luminescence property of SrAl2O4:Eu2+, Dy3+ phosphors in different temperatures between 100 K and 500 K was studied in this paper. The results indicate that fluorescence and afterglow intensity take on linear change in certain temperature range and obtain perfect luminescence property at the temperature of thermo-luminescence peak of SrAl2O4:Eu2+, Dy3+ phosphors. What is more, the regular changes between fluorescence or afterglow intensity of SrAl2O4:Eu2+, Dy3+ phosphors and temperature reveal that the electron release process composes of instantaneous release process and time-lapse release process. The luminescence induced by instantaneous release process is the component of fluorescence and the time-lapse release process induces afterglow luminescence. These processes become active with the increase of circumstance temperature and appear temperature quenching when the circumstance temperature is too high. The fluorescence and afterglow intensity of SrAl2O4:Eu2+, Dy3+ phosphors are changed linearly by circumstance temperature, which indicates its potential applications in fiber-optical thermometer material.