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Synthesis and Optical Characterization of Red-Emitting BaTa2O6:Eu3+ Phosphors
Authors:Mustafa İlhan  Mete Kaan Ekmekçi  Ayhan Mergen  Cemalettin Yaman
Affiliation:1.Department of Metallurgical and Materials Engineering,Marmara University,?stanbul,Turkey;2.Department of Chemistry,Marmara University,?stanbul,Turkey;3.Department of Metallurgical and Materials Engineering,Y?ld?z Technical University,?stanbul,Turkey
Abstract:Undoped and Eu3+ doped BaTa2O6 phosphors were synthesized via solid state reaction method and characterized by using XRD, SEM-EDS and photoluminescence (PL) analyses. The XRD results revealed that the crystal structure of BaTa2O6 allowed up to 10 mol% levels of Eu3+ ions due to the TTB characteristic network of adjacent octahedrals. SEM-EDS analyses confirmed the formation of BaTa2O6 structure and EuTaO4 secondary phase. BaTa2O6:Eu3+ phosphors exhibited orange and red emissions at 592.2 nm and 615.7 nm in the visible region respectively. The Commission Internationale d’Eclairage (CIE) chromaticity coordinates of the BaTa2O6:Eu3+ phosphors that excited at λ ex = 400 nm ranged from orangish-red to pinkish-red depending on increasing Eu3+ concentration.
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