Abstract
BaxZn1−xMoO4:Eu3+ (0.1 ≤ x ≤ 0.7) red phosphors were synthesized at the temperature of 800 °C by solid-state reaction method in air atmosphere. The structures of the phosphors were characterized by X-ray diffraction and Raman spectra. Photoluminescence (PL) spectra were also used to investigate the photoluminescent properties of the phosphors. The experimental results indicated that the introduction of Ba2+ enhanced the emission at 615 nm. The different Ba2+/Zn2+ ratios of the molybdate phosphors caused the corresponding changes of photoluminescent properties. The variation of photoluminescent intensity with Ba2+ concentration as well as with different excitation wavelengths was discussed systematically. BaxZn1−xMoO4:Eu3+ phosphors with the optimal compositions of x = 0.5 exhibited satisfactory and excellent PL and the intensity of the emission at 615 nm was about three times stronger than that of ZnMoO4:Eu3+, which could be applied as red-emitting phosphors excited by ultra-violet and blue chips in white light-emitting diodes.
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