Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/75648
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dc.contributor.authorHe, Qen_US
dc.contributor.authorSun, MZen_US
dc.contributor.authorKuang, XJen_US
dc.contributor.authorHuang, BLen_US
dc.contributor.authorYe, Sen_US
dc.contributor.authorZhang, QYen_US
dc.date.accessioned2018-05-10T02:54:18Z-
dc.date.available2018-05-10T02:54:18Z-
dc.date.issued2017-
dc.identifier.citationJournal of materials chemistry C, 2017, v. 5, no. 42, p. 10965-10970en_US
dc.identifier.issn2050-7526-
dc.identifier.urihttp://hdl.handle.net/10397/75648-
dc.description.abstractAn optical approach is an alternative method to give insight into the oxide-ion motion in oxide-ion conductors. Herein, we illustrate the correlation between upconversion (UC) luminescence in Yb3+-Er3+ and oxide-ion motion in a beta-La-2(Mo,W)(2)O-9 series. The break points at similar to 150 degrees C in the logarithmic UC emission intensity ratio of I-525/I-660 or I-660/I-550 (the three emission peaks of Er3+) versus temperature imply oxide-ion jumps, whereas the slopes of these plots above 150 degrees C suggest the capacity of oxide-ion motion. Specifically, the larger the absolute slope values, the higher the oxide-ion conduction capacity. Due to the pinning feature of the Fermi level contributed by the Mo-O bonds in beta-La2Mo2O9 both with and without anion-Frenkel defects or W dopants, as revealed by density functional theory calculations, beta-La2Mo2O9 remains electronically insulating. Thus, the increase in activation energy and decline in conductivity with an increase in W contents at low temperature (<400 degrees C) are likely attributed to the higher barrier for the formation of new anion-Frenkel defects. This research gives another perspective on oxide-ion conductors via an optical probe.en_US
dc.description.sponsorshipDepartment of Applied Biology and Chemical Technologyen_US
dc.language.isoenen_US
dc.publisherRoyal Society of Chemistryen_US
dc.relation.ispartofJournal of materials chemistry Cen_US
dc.titleUnraveling the correlation between oxide-ion motion and upconversion luminescence in beta-La2Mo2O9:Yb3+,Er3+ derivativesen_US
dc.typeJournal/Magazine Articleen_US
dc.identifier.spage10965-
dc.identifier.epage10970-
dc.identifier.volume5-
dc.identifier.issue42-
dc.identifier.doi10.1039/c7tc03695g-
dc.identifier.isiWOS:000414359500007-
dc.identifier.scopus2-s2.0-85032797846-
dc.identifier.eissn2050-7534-
dc.identifier.rosgroupid2017005220-
dc.description.ros2017-2018 > Academic research: refereed > Publication in refereed journal-
dc.description.validate201805 bcrc-
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