Abstract
Lithium ions incorporated samarium doped yttrium oxide nanostructured thin films are prepared by spray pyrolysis. Glancing angle X-ray diffraction spectrum reveals the phase and crystallinity of the film. The crystallites sizes are found to be ∼50nm. Surface morphology of the film is studied using field emission scanning electron microscope. The image appears as carved sculptures of particles with agglomeration. Fourier transformed infrared spectrum shows a sharp and wide absorption peak at 875cm−1. Optical absorption spectrum exhibits a prominent absorption peak at 270nm and the corresponding energy gap is found to be ∼5.53eV. A broad photoluminescence emission is observed in the range 560–690nm with a peaks at 595, 608 and 622nm and shoulders at 580, 645 and 662nm. The films are irradiated with γ-rays in a dose range 187–563Gy. Thermoluminescence glow curve is deconvoluted into three peaks with temperature maxima at 400, 460 and 580K. The activation energy and frequency factor of these TL glows are found to be in the order of ∼0.58eV and ∼106s−1 respectively.
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