Preparation and Luminescent Properties of Na₂Sr(MoO₄)₂: Eu³⁺, Gd³⁺ Red Phosphors

Abstract:

Red phosphors Eu³⁺- doped and Eu³⁺, Gd³⁺ co-doped Na₂Sr (MoO₄)₂ were prepared by sol-gel method, the crystal structural, morphology and composition were characterized by powder X-ray diffraction, and scanning electron microscope. The results showed that the synthesized Na₂Sr (MoO₄)₂: Eu³⁺, Gd³⁺ crystallites with stability tetragonal scheelite structure after sintering temperature at 800°C. The particle size distributions of phosphor sample are irregular and the granule size about 0.5μm.The excitation and emission spectra were investigated that the influence of Gd³⁺ ions on the luminescent properties of Eu³⁺ in Na₂Sr (MoO₄)₂: Eu³⁺ system. Luminescent intensity of Eu³⁺ on the Na₂Sr (MoO₄)₂: Eu³⁺, Gd³⁺ phosphor is much stronger than that of Eu³⁺ single doped. It is indicated that the sensitizing effect of Gd³⁺ for luminescence of Eu³⁺ obviously. The highest excitation intensity of Na₂Sr (MoO₄)₂: Eu³⁺, Gd³⁺ at 466 nm, matching the output wavelengths of blue LED chips.

• Periodical: Applied Mechanics and Materials (Volume 343)
• Pages: 107-111
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.343.107
• Online since: July 2013
• Authors: Sha Ren, Gao Wa
• Keywords: CIE, Luminescent Properties, Na₂Sr (MoO₄)₂: Eu³⁺, Gd³⁺, Red Phosphor

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