%0 Journal Article %1 WOS:000547841100001 %A Nascimento, Patresio A M %A Silva, Ariovaldo J S %A Carvalho, Iure S %A Silva, Ronaldo S %A Paschoal, Carlos William A %A Moulton, Benjamin J A %A Sampaio, David V %A Freire, R S %A dos Rezende, Marcos V S %C PO BOX 564, 1001 LAUSANNE, SWITZERLAND %D 2020 %I ELSEVIER SCIENCE SA %J JOURNAL OF ALLOYS AND COMPOUNDS %K Lithium Luminescence; X-ray absorption excited luminescence; optical spectroscopy; variation} {LiSrPO4; %R 10.1016/j.jallcom.2020.155388 %T Effects of Li addition on the luminescent properties of LiSrPO4:Eu3+ excited with X-ray and ultraviolet radiation %V 836 %X Li1+xSr0.99PO4:Eu-0.01 (x = 0.1, 0.3 or 0.5) phosphors are prepared using glucose with a modi fied sol-gel method. X-ray diffraction (XRD), scanning electron microscopy and photoluminescence and X-ray absorption spectroscopy are used to characterize the structural and optical behaviour of the phosphors. LSPOE powders have been successfully synthesized by sol-gel route and con firmed by XRD. A variation in lithium stoichiometry does not contribute to signi ficant changes in structural properties, as probed by XRD. The samples have a partially spherical morphology with a high degree of particle agglomeration. The emission intensity of Eu3+ varies with the increase in Li+ content, in agreement with the variation of the symmetric factor. This behaviour veri fies that the Eu3+ ion is in a site of low symmetry. The X-ray absorption near edge structure results reveal that the reduction of Eu3+ to Eu2+ is induced by ionising radiation and the intensity of the X-ray excited optical luminescence emission is inversely proportional to the concentration of lithium. (C) 2020 Elsevier B.V. All rights reserved.

@article{WOS:000547841100001, abstract = {Li1+xSr0.99PO4:Eu-0.01 (x = 0.1, 0.3 or 0.5) phosphors are prepared using glucose with a modi fied sol-gel method. X-ray diffraction (XRD), scanning electron microscopy and photoluminescence and X-ray absorption spectroscopy are used to characterize the structural and optical behaviour of the phosphors. LSPOE powders have been successfully synthesized by sol-gel route and con firmed by XRD. A variation in lithium stoichiometry does not contribute to signi ficant changes in structural properties, as probed by XRD. The samples have a partially spherical morphology with a high degree of particle agglomeration. The emission intensity of Eu3+ varies with the increase in Li+ content, in agreement with the variation of the symmetric factor. This behaviour veri fies that the Eu3+ ion is in a site of low symmetry. The X-ray absorption near edge structure results reveal that the reduction of Eu3+ to Eu2+ is induced by ionising radiation and the intensity of the X-ray excited optical luminescence emission is inversely proportional to the concentration of lithium. (C) 2020 Elsevier B.V. All rights reserved.}, added-at = {2022-05-23T20:00:14.000+0200}, address = {PO BOX 564, 1001 LAUSANNE, SWITZERLAND}, author = {Nascimento, Patresio A M and Silva, Ariovaldo J S and Carvalho, Iure S and Silva, Ronaldo S and Paschoal, Carlos William A and Moulton, Benjamin J A and Sampaio, David V and Freire, R S and dos Rezende, Marcos V S}, biburl = {https://www.bibsonomy.org/bibtex/2103b3abd53d0dec8cd73c1283ae117bf/ppgfis_ufc_br}, doi = {10.1016/j.jallcom.2020.155388}, interhash = {a48348114db66cc8093c54952ab228f2}, intrahash = {103b3abd53d0dec8cd73c1283ae117bf}, issn = {0925-8388}, journal = {JOURNAL OF ALLOYS AND COMPOUNDS}, keywords = {Lithium Luminescence; X-ray absorption excited luminescence; optical spectroscopy; variation} {LiSrPO4;}, publisher = {ELSEVIER SCIENCE SA}, pubstate = {published}, timestamp = {2022-05-23T20:00:14.000+0200}, title = {Effects of Li addition on the luminescent properties of LiSrPO4:Eu3+ excited with X-ray and ultraviolet radiation}, tppubtype = {article}, volume = 836, year = 2020 }