LUMINESCENCE PROPERTIES OF RARE EARTH TELLURATES

The fluorescent properties of a new class of inorganic phosphor materials based on rare-earth tellurates R2TeO6 as host materials are discussed. Yttrium, lanthanum, gadolinium, and lutetium tellurates, activated by trivalent rare-earth or by uranyl ions, show significant luminescence under ultraviolet or cathode ray excitation. The cathodoluminescent response of the uranyl-activated rare-earth tellurates is comparable to that of the most efficient uranyl phosphors known. The effect of structural variations on the spectral energy distribution of the UO22+ and Eu3+ emission is considered. © 1969, The Electrochemical Society, Inc. All rights reserved.