Studies of luminescence efficiency of Eu2+ activated phosphors as a function of temperature and high pressure

Abstract

The effect of pressure and temperature on peak energy and shape, intensity, and luminescence lifetime of a series of alkaline earth compounds doped with Eu²⁺ has been measured. The results are analyzed in terms of a quantum mechanical single configuration coordinate model. The quenching of the luminescence cannot be explained in terms of a two state model. It is possible to postulate the presence of a third state which accounts for the quenching. The properties of this third state vary in a reasonable and internally consistent manner among the compounds.