Luminescent properties of BaMg₂Si₂O₇:Eu²⁺,Mn²⁺

Abstract

Pure BaMg₂Si₂O₇ , and its europium and magnesium doped forms, have been synthesized by solid state reaction. BaMg₂Si₂O₇ and BaMn₂Si₂O₇ crystallize in an orthorhombic structure with the space group Ama2. The lattice constants obtained from X-ray powder diffraction are a=13.742(2) Å, b=12.698(2) Å and c=7.237(1) Å for BaMg₂Si₂O₇ and a=14.030(2) Å, b=12.941(1) Å and c=7.285(1) Å for BaMn₂Si₂O₇ . The emission spectra of the Eu²⁺ and Mn²⁺ doped BaMg₂Si₂O₇ materials appear as broad bands peaking at 400 and 690 nm respectively. The luminescent studies performed on the samples with different doping concentrations suggest that the Eu²⁺ →Mn²⁺ energy transfer takes place in the doubly doped samples.

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