STRUCTURAL AND PHOTOLUMINESCENCE PROPERTIES OF EU3+ DOPED (GD1-XLUX)3AL5O12 SYNTHESIZED BY SOLID STATE REACTION

Imane Lanez; Brahim  Rekik; Nesrine  Naimi

Authors

Imane Lanez LPCMIA Laboratory, Department of Physics, Faculty of Sciences, Saad Dahleb Blida 1University, Blida, BP 270 Soumaa Road Blida, Algeria
Brahim Rekik LPCMIA Laboratory, Department of Physics, Faculty of Sciences, Saad Dahleb Blida 1 University, Blida, BP 270 Soumaa Road Blida, Algeria
Nesrine Naimi LPCMIA Laboratory, Department of Physics, Faculty of Sciences, Saad Dahleb Blida 1 University, Blida, BP 270 Soumaa Road Blida, Algeria

Abstract

The (Gd_1-xLu_x)₃Al₅O₁₂ garnet compounds doped with 5% Eu³⁺ were synthesized using the solid-state reaction method calcined at 1450°C. Despite the stabilization of the phase Gd₃Al₅O₁₂ by lutetium and doped europium, XRD structural analysis revealed the presence of secondary phases, including sesquioxide (R: Ln₂O₃), monoclinic garnet (M: Ln₄Al₂O₉), and perovskite (P: LnAlO₃) as major phase, accompanied the cubic garnet (G: Ln₃Al₅O₁₂) phase. FTIR results confirmed the structure of the samples identified the characteristic bands of all observed phases. The energy transfers of Gd³⁺ enhance the luminescence of Eu³⁺activator ions. Photoluminescence analysis indicated that Eu³⁺ improves structural symmetry within the luminescent host materials. Under excitation at 360 nm, the non-centrosymmetric phases R, M and P were identified by the dominance of electric dipole ⁵D₀to ⁷F₂ transitions. In contrast, the emission from centrosymmetric cubic garnet doped with Eu³⁺ presents by the magnetic dipole ⁵D₀ to⁷F₁ dominant transition.

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