A Study on Luminescence of SrAl2O4:Eu2+

SrAl2O4:Eu2+ with optimum luminescence properties was prepared.The excitation spectrum,the emission spectrum and the long decay curve were measured and analyzed.The results showed that the long decay curve had the form L = ct-α(α=0.754).The long afterglow mechanisms of SrAl2O4 :Eu2+ were also discussed.It must have arisen from the capture and release of the hole by the trap.The stress-induced luminescence was observed here,and possible reasons were suggested.