Abstract
Self-assembled flowers of (Na0.5La0.5)MoO4:Eu3+ with many petals have been successfully synthesized by using the Ethylenediaminetetraacetic acid mediated hydrothermal route. X-ray diffraction patterns(XRD) indicated that (Na0.5La0.5)MoO4:Eu3+ crystallized into a scheelite tetragonal structure with the space group I41/a. A significant spectral blue shift was observed when the Eu3+ doping concentration increased from 2 mol% to 10 mol%. Upon 395 nm excitation, the flower-like (Na0.5La0.5)MoO4:Eu3+ structures showed a strong emission in the red region due to the characteristic 5D0 → 7F2 transition of Eu3+. The effect of doping content of Eu3+ (2, 4, 6, 8, 10 mol%) on the luminescence properties of (Na0.5La0.5)MoO4 have been reported. To check the color purity and emission quality of the phosphors, photometric parameters were investigated. The percentage of luminous efficiency of as-synthesized micro flowers was found to be 43%, which has the potential to be used in phosphor converted light emitting diodes (LED).
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