First I will give a brief overview of the current activities in the LumiLab research group at Ghent University related to luminescent materials, highlighting cathodoluminescence spectroscopy in electron microscopy (SEM-CL) and the use of red-emitting Mn4+-doped fluoride phosphors for LED applications.
The main part will deal with a specific class of luminescent materials, namely phosphors which are able to store excitation energy in their lattice, in such a way that the time between excitation and emission can be extended up to minutes, hours or even many thousands of years....
