Abstract
The luminescent properties of solid solutions Y1-xScxPO4 : 0.5 mol.% Eu3+ (x=0,0.2, 0.4, 0.5, 0.6, 0.8, 1) under excitation by ultraviolet and vacuum-ultraviolet radiation were studied. The influence of disorder of the crystal structure in solid solutions on the structure of Eu3+ luminescence spectra is shown. A non-linear dependence of values of the optical band gap on solid solution composition was obtained and a model was suggested to explain this effect. Keywords: energy transfer, luminescence, solid solutions, ScPO4 : Eu3+, YPO4 : Eu3+.
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