Synthesis and Luminescence of Europium-Containing Compositions Based on Yttrium Oxide and Oxyfluorides

摘要

By heating the products isolated from an ethyl acetate medium, luminescent europium-containing compositions based on yttrium oxyfluorides and oxide have been synthesized. The concentration of Eu3+ ions in the compositions was from 0.10 to 10 at % of the yttrium content. It has been shown that the (Eu?Y1-?)(n)On-1Fn + 2, (Eu?Y1-?)OF, (Eu?Y1-?)(2)O-3, and (Eu?Y1-?)5O(4)F(7) phases are formed during the synthesis. The luminescence of the compositions is related to the D-5(0) F-7(j) electron transitions of Eu3+ ions. It depends on the synthesis conditions, the type of matrix, the position of the Eu3+ ions in the crystal lattice, the excitation wavelength, and other factors.