Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5400386 | Journal of Luminescence | 2013 | 6 Pages |
Abstract
Eu3+ activated Mâ²-type LuTaO4 phosphors were successfully prepared by using inorganic salts, citric acid and PEG400 via the Pechini sol-gel technique. Their crystallization, morphology, photoluminescence (PL) and X-ray excited luminescence (XEL) characteristics were investigated in detail. The results indicated that the Mâ²-type LuTaO4 phase appeared at about 850 °C, which was much lower than the crystallization temperature of the solid-state reaction. And the grain size of the phosphor was controlled from nano- to micron-scale by adjusting the sintering temperature. The optimal doping concentration of Lu1âxEuxTaO4 phosphors was at x=0.10. With the sintering temperature increasing, PL intensity of the phosphor was improved remarkably, whereas its decay time was decreased. It is worth to notice that the sol-gel derived Mâ²-type LuTaO4:Eu3+ phosphors reveal excellent XEL performance and easily controlled grain size, which implies that they will have promising applications in high-spatial-resolution X-ray imaging.
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Authors
Shiwei Chen, Xiaolin Liu, Mu Gu, Chen Ni, Bo Liu, Shiming Huang,