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Effect of W 6+ dopant on the morphology and luminescence properties of NaLa(MoO 4 ) 2 : Eu 3+ phosphors

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Abstract W6+ dopant on the NaLa(MoO4)2:Eu3+ solid solution phosphors with various shapes have been synthesized via the hydrothermal method without using any structural modifier and organic solvents. The morphology and… Click to show full abstract

Abstract W6+ dopant on the NaLa(MoO4)2:Eu3+ solid solution phosphors with various shapes have been synthesized via the hydrothermal method without using any structural modifier and organic solvents. The morphology and luminescence properties of W6+ doped NaLa(MoO4)2:Eu3+ phosphors are obtained and characterized by SEM and PL/PLE spectra. Both morphology and luminescence properties are considered to manipulate by the mole ratio of W/Mo. By increasing the W6+ amount, particle shapes are changed from rice-shaped particles to spindle-shaped, cocoon-shaped, then to layers of octahedron-shaped. Under UV light excitation, all samples show bright red light due to the characteristic 4f-4f transitions of Eu3+. Tungstate and molybdate phosphors have higher luminescence intensity than that of tungstate and molybdate solid solution phosphors.

Keywords: effect dopant; luminescence properties; dopant morphology; morphology luminescence; luminescence

Journal Title: Materials Research Bulletin
Year Published: 2018

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