Enhanced Photoluminescence Properties of Li/Al-doped YPO4:Eu Phosphors
نویسندگان
چکیده
Different concentrations of Li/Al-doped YPO4:Eu0.05 phosphors have been prepared by the solid state reaction method and are characterized by X-ray diffraction, scanning electron microscopy, excitation and emission measurements. The dependence of various optical and morphological properties of the prepared materials on Li/Al concentration has been discussed in our present work. Incorporation of Li + /Al 3+ ions into the YPO4:Eu phosphors has greatly enhanced the crystallinity, particle size and hence the luminescence properties and the optimum concentration in case of both Li and Al dopants are found to be 10 mol %. The improvement in PL performance with Li/Al-doping may result from the improved crystallinity and from the enlarged grain sizes inducing lower scattering loss and distortion of symmetry. The results are discussed in comparison of results with similar reported works.
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