Synthesis and characterisation of europium activated yttrium oxide fine powders

摘要

In order to prepare fine powders of red emitting Y_2O_3: Eu phosphors, the reagent simultaneous addition (SimAdd) technique was developed and the influence of some preparative conditions on morpho-structural and optical properties of phosphors was studied. There was revealed that the precipitating reagent type and the pH of the precipitation medium influence on the photoluminescence (PL) properties as well as on the microstructure and morphology of phosphor particles. The SimAdd-tcchnique, enables us to prepare fine powders (<1 mu m) of Y_2O_3:Eu phosphors with relatively good PL performances to be used in modern optoelectronic devices.