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Issue 92, 2016, Issue in Progress
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On the thermoluminescence properties and mechanism of LuPO4:Eu sintered materials

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Abstract

Thermoluminescence (TL) of X-rayed LuPO4:Eu sintered materials was investigated as a function of the processing parameters and Eu concentration. Sinterability of the powders precipitated from a water solution was found to be much better than that previously reported for hydrothermally made precursors. The mechanism of the TL process was tracked by means of TL and EPR techniques. It was shown that TL efficacy was greatly dependent upon the processing temperature becoming most potent for pellets sintered at 1700 °C. The most potent TL was obtained for materials containing 2% Eu and sintered in vacuum. The high-temperature treatment appeared to be needed to generate defect states able to participate in energy storage by immobilization of excited carriers. With increasing concentration of the activator ions from 0.1% to 5%, the mechanism of TL in LuPO4:Eu had a continuously more localized character. EPR spectroscopy revealed that Eu3+ attracts excited electrons to the conduction band and gets converted to Eu2+, while a hole is postulated to be trapped on oxygen ions surrounding a vacant Lu site.

Graphical abstract: On the thermoluminescence properties and mechanism of LuPO4:Eu sintered materials

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Publication details

The article was received on 24 Jul 2016, accepted on 05 Sep 2016 and first published on 05 Sep 2016


Article type: Review Article
DOI: 10.1039/C6RA18804D
RSC Adv., 2016,6, 89019-89027

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    On the thermoluminescence properties and mechanism of LuPO4:Eu sintered materials

    J. Zeler and E. Zych, RSC Adv., 2016, 6, 89019
    DOI: 10.1039/C6RA18804D

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