Shifting and enhanced photoluminescence performance of the Sr^sub 1-x^Eu^sub x^MgAl^sub 10^O^sub 17^ phosphor

In the present work, the SrMgAl10O17:Eu2+, efficient nanophosphors were prepared using combustion route by employing urea as a fuel. The structural and PL (Photoluminescence) properties were measured. The crystallite sizes of the synthesized phosphor were found in the order of ∼15 nm–90 nm by the Hall-Williamson equation. The surface area of the phosphor was found ∼35.9 m2/g and the band gap was calculated ∼5.29 eV. The Photoluminescence properties were studied for monitoring excitation (λem. = 460 nm) and emission spectra (λex. = 330 nm). The phosphor shows strong blue luminescence in the range of ∼460 nm–470 nm due to the Eu (II) ions originating from the transitions 4f65d1→4f7. The photoluminescence intensity and quantum efficiency is upgraded by using an important parameter of the combustion process. The efficient SrMgAl10O17:Eu phosphors exhibits strong blue luminescence and 93.2% quantum efficiency for 8 mol% Eu. Long persistence phenomena of the phosphor was discussed using PL decay properties. The CIE color coordinate of the efficient phosphor was found (X = 0.16, Y = 0.18) suitable as a blue light emitting phosphor.