Persistent luminescence, also commonly called afterglow, is a long-lasting visible emission that lasts several hours after ultraviolet excitation. It has a wide variety of applications, ranging from glow-in-the-dark signage to in-vivo imaging for disease diagnosis and treatment. Persistent luminescence materials are generally lanthanides and transition metals such as Eu/Dy/Mn, Eu/Pr/Dy, Mn/Cr/Pr have which are embedded in silicate, diopside, gallate and germanate hosts. In this application note, the decay kinetics of SrAl2O4 : Eu2+, Dy3+ are measured using the FS5 and FLS1000 photoluminescence spectrometers.
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