Structural and luminescence properties of MgO: Li nanocrystals

Abstract

The effect of Li doping on the structural and luminescence properties of MgO were investigated in the present work. Decrease in Lattice parameter and generation of vacancies, and interstitial defects were analysed by XRD and rietveld refinement. Shift in edge energy of Mg K-edge indicates unsaturated cations which affects the PL spectra on excitation wavelength of 275 nm and 405 nm. Thermoluminescence were carried out on gammairradiated samples to study the defects present in the host. Li+ ions creates stable radiative favourable traps at 437 K with dose increment. The constant TL peaks with dose demonstrates the stability of the glow curves, indicates performance for dosimetry applications.