Structure and Luminescence Properties of (Y1 –хLaх)3(Al1 –уGaу)5O12:Ce3+ Substituted Garnets

Resumo

The compounds of different composition with garnet structure, doped with Ce³⁺, have been obtained by co-precipitation method with use of partial substitution of Y³⁺ and Al³⁺ onto La³⁺ and Ga³⁺. The crystal structure of the substituted materials has been studied in detail by neutron diffraction. The nature and concentration of substituent cations have been shown to influence the structural parameters and luminescence spectra of (Y_{1 –х}La_х)₃(Al_{1 –у}Ga_у)₅O₁₂:Ce³⁺ compounds. Changes in the geometry of the oxygen dodecahedra have the strongest effect on Ce³⁺ luminescence in the substituted materials.