LSO:Cex, Liy(x = 0.002-0.016 and y = 0.01-0.08) phosphors were prepared by Pechini sol-gel chemistry, and the influence of Li+ions on luminescence properties of LSO:Ce phosphors was discussed. It was exhibited that the optimal doping concentrations were at x = 0.006 and y = 0.02, and the crystallization temperature of pure LSO phase was reduced distinctly by Li+codoping. It was found that photoluminescence intensity of LSO:Ce0.006> Li0.02phosphors was increased by factors of 2.2 in comparison to that of LSO:Ce0.006phosphors. Enhanced luminescence was regarded as the result of alteration of crystal field surrounding Ce3+activator. Moreover, the energy transfer from Ce2 to Cel centers was induced by Li+codoping.
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Jia et al. (2010) studied this question.
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