Abstract
In the present work the Dy3+ doped Sr1-xAl2O4: xDy (x = 0.01) phosphor (SAD 0.01 phosphor) was synthesized using the urea fuel combustion method at 610 °C temperature with Sr(NO3)2 and Al(NO3).H2O as precursors. After a structural study employing XRD, it was found to be single phased in nature and to have crystallized into monoclinic phase with standard JCPDS 34–0379 card. The optical band gap for Dy3+ doped Sr1-xAl2O4: xDy (x = 0.01) phosphor (SAD 0.01 phosphor) is 2.7494 eV in the current scenario, showing that the sample is a wide band gap material. The majority of the particles appear to be irregular spherical grains with a mean size of 30–41 nm, according to transmission electron microscopy (TEM). Using excitation wavelength of 350 nm, the photo-luminescence analysis revealed that it produces broad emission spectra. With a colour temperature of 81953 K and colour purity of 47.77 %, the Dy3+ doped Sr1-xAl2O4: xDy (x = 0.01) phosphor (SAD 0.01 phosphor) can be tuned as blue (0.22, 0.22) emission. The spectra are very bright and in the visual range.
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